GeophysiKIEL Department of Geophysics Institute for Geosciences Kiel University. Summer 2007

Transcription

1 GeophysiKIEL Department of Geophysics Institute for Geosciences Kiel University Summer

2 Cover picture by D. Schulte-Kortnack: The Irazú Volcano is an active volcano in Costa Rica, situated in the Cordillera Central. The volcano's summit has several craters, one of which contains Diego de la Haya, a green crater lake of variable depth. To read more about projects and field work in Costa Rica, turn to page 5. 2

3 Welcome to our Geophysics-Newsletter! Dear readers, By now, the year 2007 can be regarded as a year of extraordinary discoveries, changes and jubilees of global and local importance. Just some examples: The first habitable exoplanet has been discovered only 20 light-years from here, while the first geophysicists are colonizing the top of OHP1; the twilight of Diplomae has come while Masters are ready to rise; Sputnik turns 50 and the THW wins a hat trick... Another outstanding innovation of 2007 is the newspaper in your hands, or on your screen. This journal has been created by enthusiastic authors and editors in order to help you to keep track of the discoveries, changes and jubilees of our rapidly-evolving geophysical department. The paper speaks for itself: There is a lot to tell and to enjoy. On behalf of the board of directors, I congratulate the editors, wishing them a lot of feed-back from the readers and ongoing inspiration and contributions for further issues. Prof. Dr. Wolfgang Rabbel Impressum: Department of Geophysics Newsletter Published yearly in English at First issue in summer 2007 Editors: Ron Hackney, Martin Thorwart, Susi Woelz 3 Table of Contents CONFUSED VAMPIRES AND GEOPHYSICS IN THE WESTERN CARPATHIANS 4 Maria S. Merian Costa Rica field work 5 Lost in Translation - Seismic campaign 2006 in Taganrog/Russia 6 GRAVITY IS NOT KEEPING US ON THE GROUND 7 MEETINGS: Bienvenidos a Kiel - 20th LATIN AMERICA COLLOQUIUM 8 FUTURE OCEAN CLUSTER: ACKNOWLEDGMENT OF EXCELLENCE IN KIEL 8 GREAT TIME IN SAN FRANCISCO 9 INTAGRAF What do you tink about it? 10 Erasmus cooperation with Kocaeli University in Izmit (Turkey) 10 Merapi Workshop in Yogyakarta, Indonesia 11 ArchaeoGeophysical field trips A Magical Triggerbox or Spiderwebs on the Alkor 12 Analysis of seismic anisotropy in the area of the German Regional Seismic Network 13 Institute field days 14 Graduation, Statistics, Alumni, Nice Things! 15 The students representatives 18 COMIC 20 Who s Who in the institute? 21

4 CONFUSED VAMPIRES AND GEOPHYSICS IN THE WESTERN CARPATHIANS by Zuzana Alasonati Tašárová To most people, the Carpathian mountains are known only for their legendary pointy-toothed, blood sucking vampires, such as the main character in Bram Stoker's popular Dracula novel from To geoscientists, the Carpathians are better known for the Vrancea seismogenic zone, one of the most seismically-active areas in Europe. Vrancea has attracted the attention of several international research programs focused on investigation of the Mesozoic/Cenozoic evolution of the Carpathians and the cause of an unusually vertical zone of seismicity. density model. The model is constrained by a relatively large amount of geophysical and geological data, most notably data from the CELEBRATION 2000, ALP 2002 and SUDETES 2003 seismic experiments. These data provide an excellent foundation for combined geophysical interpretation of gravity, magnetic, seismic and geological data. Geographically, the arcuate Carpathian mountain range extends over a distance of almost 1500 km in Central and Eastern Europe. The Carpathians are typically divided into several distinctive segments: the Western, Eastern and Southern Carpathians (clockwise from left). However, a vampire banished to the Western Carpathians is likely to be confused as to whether he should stop in western Romania or continue all the way to Slovakia. There are two different parts of the Carpathians referred to as western - the westernmost part of the Carpathian Mountains, located mainly in Slovakia but also in Poland and the Czech Republic, and the Apuseni Mountains in Romania located to the west and northwest of the main arc of the Eastern and Southern Carpathians. Topographic map showing the main geographic features of the Carpathian s Confused vampires aside, a study commenced at CAU Kiel in early 2006 aims at understanding lithospheric structure and tectonic evolution of the (western-most) Western Carpathians and surrounding regions, the Bohemian Massif, European Platform and Pannonian Basin in Slovakia, the Czech Republic, Poland and Hungary. The main goal of this project, conducted by Dr. Zuzana Alasonati Tašárová with support from a German Research Foundation Nachwuchswissenschafler (young-scientist) Fellowship, is to develop a three-dimensional (3-D) 4 Dr. Alasonati Tašárová's activities are also fostering international collaboration and facilitating know-how transfer between the CAU-Kiel (Geophysics and Geoinformation, leader Prof. Dr. Götze) and her former working group at the Comenius University in Bratislava, Slovakia (Environmental and Applied Geophysics, leader Assoc. Prof. Dr. M. Bielik).

5 Maria S. Merian 04-2 by Marten Lefeldt & Yvonne Dzierma The second leg of MSM 04 started on 3 Jan 2007 and ended on 19 Jan 2007 at Fort-de-France, Martinique. On board we had an international team of scientists from Germany, France and Norway, all with the aim of investigating the Lesser Antilles subduction zone offshore Martinique and Guadeloupe with two seismic profiles of 50 and 44 ocean bottom stations, respectively. The data quality of the 150 km lines was extraordinarily good. In addition to these measurements, a passive seismic monitoring network was installed in the same area to study transient signals. These stations will be recovered later by the French vessel RV Atalante. Bathymetric measurements were made in the whole area covered by the cruise. However, the real highlight of the cruise was certainly neither the food nor the bar, but the newly developed pore pressure measurement equipment (GCPP) at least for geophysicists who d never seen such a thing before. After each breathtaking recovery, it was filled with curious, reeking sea floor mud: nice stuff for all of those who are secretly missing the sandbox. Finally, a lander for longer term in-situ pore pressure measurements was deployed on a mud volcano. While all the science worked nicely, the largest problem on board was the neverending shaking of the ship, a real physical miracle given the relatively calm seas. Right after MSM 04-2 we headed on to Costa Rica, learning that it can take more time to travel from Fort de France to San José than to Hamburg provided you need to stop in five different countries on the way. Costa Rica field work by Yvonne Dzierma & Marten Lefeld The very next day we turned southwards to service the 16 broadband seismic stations installed along a transect through the Talamanca mountain range as part of the SFB Volatiles and Fluids in Subduction Zones (project A2). The stations were installed in April 2005 to study the deep structure of the subduction zone by a receiver function analysis and will also be included in local and teleseismic tomography. Arriving at the stations is a lot of fun for people who enjoy driving off-road. The only thing moving faster than geophysicists in a Toyota Prado turned out to be running iguanas in the tropical sun and probably on an overdose of sugar cane. After climbing over fences, and sometimes even clearing our way with a machete, we found ourselves facing bulls, huge tarantulas, cable-eating ants, maneating mosquitos and venomous snakes, but were rewarded by wonderful mountain views, waterfalls and tropical fruit and a black jaguar crossing the road in front of us. Six borehole stations looking for non-volcanic tremors are installed in Nicoya Península. After a whole day of transit from the southern moist forests to Guanacaste s dry grasslands, we re looking forward to being back in the field again and whatever is waiting for us. Anyway, Idiana Jones and MacGyver, these preschoolers, could learn quite a few trips from a geophysicist 5

6 Lost in Translation - The seismic campaign 2006 in Taganrog/Russia by Tobias Jokisch [Dobry utro, Sash! Kak dila?] - [Dobry utro, characho, blabla... bladiblubb......piwa bla......naduwnaja lotka]? Er, Susi, what did he say? We're in Taganrog, South Russia, to conduct some marine seismic measurements and the nearest English-speaking individuum is thousands of miles away. We, that's the SEAMAP-3D Team: Christof Müller, Susi Wölz and me. Detlef Schulte-Kortnack, the technician and father of our acquisition software, had to stay in Kiel, though continously working on this campaign. As far as I remember, we received more than just one upgraded version of the software via , not to mention numerous phone calls to Kiel at any time of the day. The latter forced the phone company to freeze Christof s cellphone account he had spent much more than a child at his age (obviously assumed to be 16) would gain as pocket money. frequency boomer source, acquiring data along various seismic profiles within the bay of Taganrog for reconnaissance and, if possible, trying to obtain a coarse grid of singlechannel recordings in the transition zone (which is, in case of Taganrog, defined as the area where people stand in the waters of the Sea of Azov without their panties getting wet). We managed to fullfill all these tasks but have to admit that most of the seismograms display just a bunch of good-looking seafloor multiples. This is probably due to the high algae production in the area, followed by a thick layer of sapropel on and just below the seafloor. Entering the transition zone was not as easy as supposed, as the draft of our research vessel allowed only water depths exceeding approx. one metre. Looking at Sash, our captain, we assumed that the common use of his boat, a hydrofoil, was to impress women. Sash proved that it's not a big deal to accomplish seismic measurements on RV Alkor... Apart from our duties, we experienced two weeks of extremly good weather (meaning no wind and sunshine with temperatures rising up to 40 deg), many nice and helpful people, Hired boat and captain at Taganrogs water front doing boomer seismic with a streamer. 24 h/day radio broadcast in the main street (in But what were we supposed to do down there? which we lived Wherefore did we accept all the risks? It's been the in), as well as hope of scientific success, the challenges of ultrarussian guys shallow, algae-oversaturated waters and, above all, with mesh vests and the attempt to reach ever-growing frustration levels. Russian girls Last but not least, archeological findings of pot with mesh shards on the beach of Taganrog led to the skirts. The assumption that the remains of a Greek settlement latter doesn t could be sedimented below the seafloor. An necessarily onshore excavation followed which revealed look good, but artificial structures in a depth of six metres. Now it's is practical in a warm climate. All in all it has been an up to us to find more... interesting campaign and I would like to thank Experienced as we are, we cut down the survey Christof and Susi for these two weeks in Russia. objectives to the necessities: Investigating the feasibility of marine seismic profiling using a high6

7 GRAVITY IS NOT KEEPING US ON THE GROUND by Ron Hackney The HALO aircraft to be operated by the German Space Agency. Methods for measuring gravity data are rapidly changing. It is ironic that measurements of the force that keep us on the ground are more and more often made in defiance of that force - in the air and from space. Despite resolution limits, the ability to cover large areas quickly overcomes some of the disadvantages associated with measuring gravity on the surface (i.e. the lack of data in inaccessible areas and the discontinuous data across coastlines and international borders). Several Kiel geophysicists are currently active in the acquisition and application of gravity data obtained above the surface of the Earth. These data are, or will be, obtained from a helicopter, a new high altitude, long-range scientific jet, and the satellites of the CHAMP, GRACE and soon GOCE missions. Sketch illustrating the principle of airborne gravimetry. The German government has recently funded a high-altitude, long-range research aircraft (HALO). HALO was initially planned as a platform for atmospheric research, but Prof. Hackney is part of plans to steal the show by using HALO for solid- Earth applications. A HALO geophysical demonstration mission over the Aegean Sea has been proposed and will hopefully take place shortly after preparations of the aircraft are complete (roughly 2009). The longer-term plans are to use HALO to make geophysical measurements in remote areas that are extremely difficult to access (Antarctica, Himalaya, Amazon). Measurements of the gravity (and magnetic) field from new-generation satellites are now achieving global coverage with unprecedented resolution. The CHAMP and GRACE satellites have been active for a few years now. Data from these new satellites has been used by Kiel geophysicists for estimating lithospheric rigidity on a continental scale and for regional tectonic interpretations. We are also positioning ourselves to take advantage of the gravity gradient data that will become available after the GOCE satellite is launched late in In early 2007, Prof. Götze, together with new-arrival Dr. Sungchan Choi, lead an airborne gravity campaign over the Dead Sea transform fault. This campaign involved using a vector gravity meter in a helicopter operated by the German Federal Institute for Geosciences and Natural Resources (BGR). This campaign has provided gravity data to constrain crustal structure associated with a prominent geological feature that poses significant seismic hazard. Importantly, the data obtained will be uniform across politically-sensitive borders. The survey is part of the multidisciplinary DESIRE project and is notable in that, for the first time, the gravity campaign is more expensive than the complementary seismic survey! A joint project with the German oil industry, in which a helicopter gradiometry survey will be conducted offshore from Schleswig-Holstein, is also planned. Using a gradiometer, highresolution measurements of the gravity and magnetic field, as well as its derivatives, will be obtained for application to detailed 3D subsurface modelling of this economicallyimportant part of the south-eastern North Sea. 7 Global gravity field model EIGEN-GL04C (Bouguer anomalies) These activities, and many others around the world, demonstrate a resurgence in utilisation of the gravity field. There are certainly exciting times ahead for users of gravity data! Suggested internet links: DESIRE Project: BGR airborne geophysics: Geophysik/ Aerogeophysik/aerogeophysik node en.html nnn=true GOCE: International Centre for Global Earth Models: HALO:

8 aaaaeeeeccccxxxxkkkkccccnnnneeeeoooollllwwwwlllllllleeeeeeeennnnddddccccggggeeeeeeeemmmmiiiieeeennnnnnnnttttkkkkiiiiooooeeeefffflllmeetings: Bienvenidos a Kiel - 20 th LATIN AMERICA COLLOQUIUM levery two years, geoscientists with an interest in Latin America meet in Germany to discuss their latest results and ideas. These Latin American Colloquia aim to foster cooperation between scientists working in Latin America. The most recent Latin American Colloquium, the 20 th, took place in Kiel from April 10 th to 13 th and was organised by Kiel Geophysics together with IfM-GEOMAR. Multidisciplinary research on the key processes affecting the character of continental and oceanic lithosphere and continental margins was the focus of the conference. Thanks to generous support from the German Research Foundation, Land Schleswig-Holstein, Collaborative Research Centre 574 and Wintershall, almost 40 young and established Latin America researchers were invited to attend the meeting. These scientists added to around 200 other participants who attended from all over the world. Further information, including program and abstract volume: Friday the 13 th of October 2006 was a great day for the University of Kiel. On this day new Clusters of Excellence were announced by the German government. Kiel's ''Future Ocean proposal was one of 17 successful cluster proposals, meaning that over the next 5 years more than 30 million Euros will be available for studying a wide range of issues connected to the world's oceans. The Future Ocean Cluster of Excellence recognises the importance of the world's oceans as the planet's largest ecosystem, as an important regulator of atmospheric composition and global climate, and as a provider of essential living and non-living resources. The aims of the Future Ocean Cluster are: (1) to improve our understanding of ocean change in response to human activities, (2) to provide the scientific basis to develop, implement and assess sound global and regional ocean management options, (3) to build our capacity to reliably predict the risks associated with ocean change and natural hazards, and (4) to explore new marine resources and develop strategies for their sustainable use. These aims will be achieved using a multidisciplinary research strategy 8 that focuses on the pathways, impacts and feedbacks of ocean change and their interaction with society in terms of ocean resources, services and risks. The Cluster comprises 13 elements in two themes ( Oceans in the Greenhouse World and Marine Resources and Risks ). CAU Geophysics is actively involved in two of the 13 Cluster Elements that will focus on Submarine Hazards at Continental Margins (B4) and Sea- Level Rise and Coasts at Risk (B5). A key component of the Excellence Cluster is the establishment of 14 new Junior Research Groups (JRG's) in key interdisciplinary research areas. These JRGs will augment the expertise provided by the well-established research groups that already exist at CAU. At the end of January and in early February, almost 70 candidates for these JRG positions gathered in Kiel to present their current research activities and to share their ideas for the Future Ocean. We are looking forward to working within the Future Ocean Cluster, particularly with the two candidates chosen to lead the B4 and B5 JRGs. Further information:

9 GREAT TIME IN SAN FRANCISCO by Aysun Nilay Dinc My first time at the AGU fall meeting and in the great city of San Francisco was amazing. The meeting hall was unbelievably crowded (over ten thousand scientists). Even though we had a jet lag, we were all the time in a hurry to catch the talks and, at the same time, the life in the city. The most exciting part of the meeting was that there are many well-known scientists all around and you may have the chance to meet with them. They are known by their names and their articles and maybe they are your idols, but you have no idea what they look like. I was in front of my poster and a guy came and asked me to describe my work. He was asking much more theoretical questions than the other people. Therefore, I was sure that he was really experienced in the field of my study. I tried to see his name from the badge but it was turned around. After a nice discussion, he thanked me and said "by the way I am C. Thurber". For me he is the guru of Local Earthquake Tomography (LET). I learned everything about my topic from his publications. Therefore I can't express what I felt at that moment, I just know that I was really excited. If I consider the life in San Francisco, there are not enough words to describe it. I can just say that it is multicultural, full of energy, nice place to live, friendly people all around and... I still do not know how we managed to attend the sessions during the day time and visit the most famous places such as Golden Gate bridge, Alcatraz, Fishermenswharf, Crocodest street, China Town, Ashburry, Golden gate park, Japanese tee garden and so on in just one week. On Saturday we walked all through San Francisco. I think we were influenced by the energy of the city. 9

10 INTAGRAF 2006 What do you tink about it? International Alpine Gravity Field Course Merano, Italy by Venke Giszas & Kathrin Lieser Hello, my name is Fjalar, pronounced Fjalar - Could we call you Olaf? A few initial communication difficulties were to be expected. The International Alpine Gravity Field Course (INTAGRAF) was, after all, a colourful mix of Germans, Austrians, Slovaks, Italians, French, New Zealanders and Icelanders. But after the first two days of INTAGRAF, during which the participants organised their own cultural and scientific exploration of Meran and surrounds, pronouncing Icelandic names was no longer a problem. After two weeks of lectures, field measurements and evening meetings at the Forst Brauerei, for mini-golf or at the sublime thermal resort, even Slovak tongue-twisters were successfully tackled! INTAGRAF is not purely an exercise in linguistics. The course is financed by the European Union through its ERASMUS Intensive Program and has been run three times in the last few years (2003, 2005 and 2006) by the Universities of Kiel (Germany), Triest (Italy), Vienna (Austria), Bratislava (Slovakia), Jena (Germany) and Trondheim (Norway). The final course in this series will take place at the end of July The aim of INTAGRAF is both educational and practical. On the educational side, participants are provided with theoretical and practical training in measuring and processing gravity data. The course is based around a series of lectures on the principles of gravimetry. These lectures are followed by several days of field measurements in the beautiful valleys, between the apple trees and on the steep mountain sides in and around Meran. The gravity data measured in the field are processed at the end of the course and provided to the South Tirol Kadaster Office. The Kadaster Office encourages and supports INTAGRAF because the gravity measurements we made overcome a lack of gravity data in South Tirol. Ultimately, the INTAGRAF data will be used by the Kadaster Office to define a Internet link: high-resolution geoid for South Tirol. Erasmus cooperation with Kocaeli University in Izmit (Turkey) by Sarah Held In 2006 a new Erasmus coorperation with Kocaeli University, Turkey, was established. For this reason, a one-day summerschool was held in Izmit on August 14, Several students took the opportunity to explore a grave mound of the ancient city of Nikomedia (today Izmit) with georadar and geoelectrics. Nikomedia was founded in 264 B.C. as the capital of the Bithynian Kingdom before it joined the Roman Empire in 74 B.C. It became quite important as a residence of the Roman emperor Diokletian in 286 AD. We hope to continue the summerschool on a larger scale next year. On the basis of the Erasmus cooperation, three students are already arrived in Kiel in the winter semester and we welcomed three more students in SS They will be studying here for one semester. The Erasmus coordinator is Dr. Harald Stümpel. 10

11 Merapi Workshop in Yogyakarta, Indonesia by Diana Wagner In September 2006, the Volcano International Gathering took place in Yogyakarta, Indonesia. A field trip to Merapi flank was organized for day one. We visited the village of Kali Adem (Fig.1), which was partly destroyed by pyroclastic flows from Merapi volcano in June Unfortunately, Merapi summit was hidden behind clowds, so that only its flanks were visible. At the end of the field trip we went to Borobudur temple, which is a buddhist Fig.2: Bomo-Tengger-Caldera Fig. 1: Destroyed buildings due to the pyroclastic flows of Merapi volcano in June 2006 discussions about Merapi volcano. The aim was to better understands the volcanology of Merapi and to get a more reliable hazard assessment. I also got a lot of additional information helpful for the interpretation of my own studies. Finally, I joined a field trip to Bromo-Tengger caldera, East Java, which is a volcanic complex that consists of at least two calderas on its top. We got up at three o'clock in the morning to be there during sunrise. It was great to see the panorama during sunrise. The changing colours and the fog covering the bottom of the caldera were impressive. Bromo volcano degassed immensely during our visit and, in the background, Semeru volcano erupted every 15 to 20 min (Fig.2). After taking numerous photos, we drove to Bromo volcano and climbed it. As is clear from the photo showing the Bromo Tengger caldera, the field trip to East Java and Bromo volcano was the highlight of the workshop. monument located in the middle of Java island. Surrounded by volcanoes such as Merapi, Merbabu, Sundoro, Sumbing and Telomoyo you have a impressive scenery, especially during sunset. The following day, the workshop started with an opening ceremony. The next three days consisted of interesting talks and posters and on-going ArchaeoGeophysical field trips 2006 by Ercan Erkul In Archaeometry, we use geophysical methods for detecting archaeological objects from the surface. Targets for this kind of geophysical exploration extend from street networks and city walls to detailed investigation of specific buildings. While geomagnetics is normally used to do large-area mapping of archaeological sites, geoelectric, georadar, and seismic methods can be used to provide detailed information about objects of special interest. To ensure high-precision positioning, differential GPS is used. From Russia in winter to Turkey in summer, we visited many locations in To get more information about our project locations, you can download the following.kmz-file and add it to My Places in Google Earth. Information will be updated from time to time, so don`t forget to check for new content (or just establish a network link). 11

12 A magical Triggerbox or Spiderwebs on the Alkor by Dennis Wilken This is a miraculous story full of ghosts, myths and a huge spiderweb. It happened not long ago on Kiel's legendary research vessel that goes by the promising name of ''Alkor''. Alkor was the lab for simultaneous experiments of, one might say, fantastical nature. A few of those experiments came with a periodic noisy bang that made the whole ship quake and shiver, while others sounded in the backgound, but at the same time, and filled the sea with a silent buzzing. The skilled eye could have seen that those calls to the deepness came from a central room, deep inside the interior of the Alkor, before they were released in the dark water behind the ship. So let us learn a bit more about this room. If one stood at the stern of the proud ship, one could follow two strings comparable to the cirri of a plant. Those cirri were wound over the whole stern until they disappeared into the ship's interior. On their way they avoided great winches, negotiated every hurdle, cases and boxes or even doors. So it happened that the cirri were more or less merged together in some parts. Drawing to the end of their way, one could find a small hole in a steel wall. Having passed this hole one entered the sphere of the fabled and so-called trigger-signal that was the controling part of all the work on our beautiful ship. The trigger-signal followed labyrinthine ways and somewhere it released the clangorous calls. On some other point it ordered to the ship to tell its position for each call, which was a miraculous act in itself. Furthermore, all the little active apparats were given the command to record the echo of the calls. Now it happened that the ways of the signal became disordered and they ended in a dark spiderweb of gluey BNC-wires that restrained the humans on board or even caught them and kept them away from their equipment. And in the darkest moment, they even lost the signal in the web. Then there were strange rumours put out, rumours about a trigger-ghost that walked aboard and disordered both the depth-calls. One even spoke of invisible interaction among the great strings that came from the stern, but the crew on our ship never found this ghost. Some trigger-signals had different duration and one spoke of flanks and that the calls ascended the flanks or descended them, so that they did not sound simultanously anymore. All this confusion lead to only one conclusion. The humans on board said that only order and perhaps a little bit of magic can seize and end the terror. And they decided to build an astonishing and mysthical thing and they called it the allround-triggerbox. This box should send the great controlling signal in ordered and safe ways and even allow it to set up its amplitude, duration and, if needed, form. And one should be able to do this with only one socalled computer that controls many channels. Oh, what a blessing! From that moment on, all lived with the hope that the future holds no more triggerghosts and spiderwebs. 12

13 Analysis of seismic anisotropy in the area of the German Regional Seismic Network (GRSN) by Cyrill Eckhardt The German Regional Seismic Network has been running for about 16 years of now more then 22 broadband stations (Fig. 1). All stations are equipped with a Quanterra digitizer and a Streckeisen STS-2 seismometer. The Seismological Central Observatory collects and archivies the data. Data can be accessed automatically via Internet. We have set up a local data pool of about 2000 teleseismic earthquakes for the GRSN stations. The aim of our project is to study seismic anisotropy in the Earth and to distinguish the anisotropy of the crust and upper mantle. We use the receiver function methods, which is able to image discontinuities like the Moho by separating the energy of P-waves and S-waves generated at discontinuities. The presence of anisotropy leads to two S-waves, SV and SH, which have perpendicular polarisation. They also travel with different velocities. We have identified clear crustal conversions (PmS) and weaker mantle conversions (P410S, P660S) for both S-waves (Q,T Fig. 2). The next step is to evaluate the angle of anisotropy and the delay time between the two S-waves to determine the degree of anisotropy. 13

14 Institute field days by Gudrun Reim & Kathleen Helbig In geophysics, not only is research carried out but pleasure and leisure are rated highly. Under the motto A lovely day for a walk or move in the groove our first excursion in May 2005 was arranged under the administration of Hajo Götze. We took the train from Kiel to Preetz and walked along the banks of the Schwentine River through the glacial valley formed during the ice age until we reached Oppendorfer Mill, which was at one time a water mill. Here, we had a short break and strengthened ourselves with some lunch. On the way, old memorial stones (plaques) and an old manor house gave us some insight into the history of this region. Ignoring signs like walk at your own risk, we courageously carried on to the pier and chugged back along the river with its jungle-like embankments to Kiel. Response positive - which If you think Schleswig-Holstein is small you re wrong. 3,5 hours until we reached Hallig Hooge! A guided tour of a captain s house and a film about the storm surge gave us better understanding of life on a Hallig. In view of so many impressions we had to have a typical Frisian meal. Shrimps, Labskaus (very typical Frisian meal with mashed potatoes, beef, matjes herring and beetroot juice, served with a sunny side up fried egg), a selection of seafood dishes and Rote Gruetze (red currants and raspberries thickened with cornstarch). Did we forget something? Of course, the whole thing was called hiking day, so we hiked from the Backenswharf either halfway or all the way around the whole island. means next year we ll do it again. But, a year is long and the winter in the north is uninviting and dark movement does you good and barley water is healthy, so we decided to play skittles. Never done it before? No problem. Some turned out to be natural talents. Straddle-legged or with an elegant swing of the hips, everything was allowed. Just as well the genuine skittle players weren t watching! After a Pharisäer (cacao with rum and whipped cream) the national drink of the North Frisian's, we started our homeward journey. In summer 2006, the minds needed a little rest again. What makes your head free? A little North Sea breeze maybe? The Hallig in North Frisia is unique in the world. Lucky for us that tideway's also allow the boats to reach the island when the tide is out. Incidentally, Hallig comes from Hal = salt in the Frisian language, hence salty marshes. But before we reached our destination, we took the train over the Kiel Kanal and the Rendsburger Railway Bridge (an engineering masterpiece of the last century). 14

15 GRADUATION DOCTORATES Simone Kugler Estimating 2D and 3D shear wave velocities of shallow-water marine sediments from the analysis of Scholte -wave dispersion Matthias Strahser Near surface seismoelectrics in comparative field studies Sascha Bussat Anregung von Grenzflächenwellen am Meeresboden durch Quellen in der Wassersäule Ulrike Werban Geophysikalische Erfassung von Feuchte- und Substratheterogenitäten im Boden auf unterschiedlichen Skalen DIPLOMA THESES Tanja Fromm Untersuchung des Übergangs von laminarer zu turbulenter Umströmung eines hydroakustischen Empfangssystems und der damit verbundenen akustischen Emission Aaron Gaal Thermoline Strukturen eines reflexionsseismischen Datensatzes vor der Sunda-Strasse Wiebke Suhr Acoustic full waveform inversion for transmission and reflection geometry Christina Klein Die Problematik der Datenkombination bei Messungen mit unterschiedlichen Georadarantennen Angela Schlesinger Störungssysteme in der deutschen Nordsee - Reflexionsseismische Untersuchungen von Wegsamkeiten für Fluid- und Gasmigration Awarded best thesis in 2006 by the Kiel Geophysics Friends and Supporters Society. BACHELOR of SCIENCE Philipp von Wussow Interdisziplinäre Interpretation einer quartären Rinne und deren Visualisierung mit einer 3D Dichtemodellierung SOME NUMBERS 15 This figure shows the number of students in the recent past semesters: yellow bar, diploma; green bar, bachelor and blue bar, PhD. The blue line shows the number of students in the department including PhD-candidates, the red line only regular students.

16 A L U M N I From October 2002 until March 2006 I was employed at the Institut of Geosciences, Dept. of Geophysics. During this time I worked in different projects i.e., EU-Project WATERUSE and the BMBF-Project GeoModel where I was mainly engaged in the mapping of soil substratum and soil water content heterogeneities to support soil scientific and hydrological research. This was done with DC-geoelectrics and GPR (Ground Penetration Radar). I also worked temporarily at the Ecology Centre Kiel and supported landscape investigations using GPR measurements. In February 2006 I was awarded my doctor s degree and since May 2006 I have been working at the Helmholtz Centre for Environmental Research in Leipzig in the department of Monitoring and Exploration technologies. My activities include planning, organisation and carrying out projects, the cooperation and application of third-party funds, supporting and supervising graduate students and doctoral candidates, as well as training technical personnel. My scientific duties lie in the further development and utilization of geophysical procedures in the context of water, soil and biodiversity research. The department was founded at the end of 2005 and takes care of a platform for research and technology called MOSAIC (Model-Driven Site Assessment, Information & Control). This means that I am entrusted with the task of structuring and the realization of MOSAIC. Dr. Ulrike Werban Helmholtz Centre for Environmental Research (UFZ) in Leipzig Dr. Thies Beilecke Leibniz Institute for Applied Geosciences (GGA-Institut) in Hannover Hello, my name is Thies Beilecke. I started my university studies with Physical Oceanography at Kiel University but merged to Geophysics after the socalled "Vordiplom". As a student, I participated in different projects at the university, but also worked for a geophysical consulting company in Kiel. After finishing my studies, I worked as field geophysicist with Geo- ForschungsZentrum Potsdam for some time but soon started to work on my doctoral thesis at Kiel University within the framework of the German Continental Deep Drilling Project (KTB). Currently, I am participating in different projects at the Leibniz Institute for Applied Geosciences (GGA-Institut) in Hannover, Germany, which is situated at the same location as the German Federal Institute for Geosciences and Natural Resources (BGR) and the State Authority for Mining, Energy, and Geology, Lower Saxony, Germany (LBEG). The projects I have been or am involved in are research into pressure-dependent seismic reflection coefficients in the crystalline basement at the Continental Deep Drilling Site (KTB) in Germany and seismic mapping of aquifer structures underneath cities using shear-waves and geophone land-streamers. The seismic projects here are typically carried out in cooperation with external partners, partly with geological or geotechnical background, but with increasing importance in the area of geothermal energy research. One positive aspect of working here is the close link with the practical challenges faced by colleagues from different professions. 16 A L U M N I

17 Rising generation of scientists and other nice things Hi, I'm a little baby boy Adonay Mahatsente, the son of Rezene and Tsige born on the 7th of January 2007 in Kiel (51 cm/3875 g). My hobby is sleeping. Chiara Hackney-Britt here pictured in her Geophysicssponsored dressing gown, is the daughter of Ron and Allison, born in Berlin just as Ron started in Kiel. She has safely negotiated her first 2 years and is a regular visitor to the department - not just for social gatherings, but she has already attended (not necessarily attentatively) two geophysical talks. Tijda Xezal Bilgili born in Kiel; first field trip in summer 2002 to Sarissa/ Turkey, since then 'very' young scientist in archaeo-geophysics workgroup; hobbies: game-playing, music, get together with friends. 17 Geophysics brings people together: Zuzana and Paolo got married last summer. One can see from the cake that it was the wedding of two geophysicists...

18 Contact and General Information Address Otto-Hahn-Platz 1, Kiel, Germany Phone number (+49) Home page Notice board Activies Fachschaft[at]geophysik.uni-kiel.de In the corridor of the second floor in Münster: GAP - Annual meeting for students of geophysics : Geoscience summer party in Kiel GAP in Kiel Please try to contact us by first. Name/Photo Assignment Name/Photo postgurke [at] web.de organisation of student meetings, public affairs Venke Giszas Michael Lay mlay [at] geophysik.uni-kiel.de Fachschaftsvertreterkonferenz (FVK), public affairs, student meetings vera1329 [at] aol.com FVK, coordination with students from other courses Vera Glomb 18

19 Name/Photo Assignment Name/Photo Nils Köther nkoether [at] geophysik.unikiel.de course guidance, student representative of the erweiterter Institutsbeirat kathrinlieser [at] gmx.de inventory, department "Internet" at "Geophysikstudenten.de" Kathrin Lieser Stefan Möller stefanmoeller [at] freenet.de student representative of the erweiterter Institutsbeirat claudia.podolski [at] web.d finances Claudia Podolski Benjamin Gutknecht benjamin [at] geophysik.unikiel.de Website, representative in the convent and the professor search Committee(marine geophysics), department national at "geophysikstudenten.de" plaadin [at] aol.com "Fakultätsausschuss für studentische Angelegenheiten" Martin Proksch 19

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21 Who is Who in the institute Paolo Alasonati Dr. Zuzana Alasonati-Tašárová Born 1974 in Turin; studied Telecommunication Engineering in Turin and Aachen; since 2006 in Kiel, Research associate in the Potential Fields group; Research interests: geophysical signal processing, statistics in Geophysics, volcanology and seismology, shallow Geophysics. Hobbies: sport and outdoor activities. Born 1976 in Banská Bystrica, Slovakia; Studied Geodesy in Bratislava; PhD 2004 in Berlin; since 2006 in Kiel, Research associate in the Potential Fields group; Research interests: gravimetry, 3-D modelling and interpretation of the gravity field in subduction and collision zones; Hobbies: sport, hiking, languages. Dr. Said Attia al Hagrey Sven Arndt Born 1951 in Algafaria; Studied Applied Geophysics at Cairo University; Ph.D in Kiel; since 1988 in Kiel, Research associate in the Applied Geophysics group; Research interests: High-resolution studies of hydro- and biogeophysical problems including 4D (preferential) fluid/solute dynamics in soils, soil-plant-atmosphere water balance and a study of botanical activities and processes; Hobbies: sport, social and cultural activities. Born 1974 in Kiel; Studied Computer Science and Geology in Kiel, Bremen and Seattle; PhD student in the Applied Geophysics group; Research interests: marine seismology, correlation between deep faults and near-surface structures, instrumentation and methods; Hobbies: sailing, reading, software development, internet and telephone infrastructures, roleplaying. Dr. Filiz Bilgili Dr. Sungchan Choi Born 1969 in Pülümür (Turkey); Studied Geophysics in Istanbul and Kiel; PhD 2005 in Kiel; since 1996 in Kiel, Research associate in the Applied Geophysics group; Research interests: combined geophysical investigation of archaeological remains; Hobbies: making music, theater. Born 1963 in Seoul (Korea); Studied Geophysics in Berlin; PhD 2000 in Berlin; since 2007 in Kiel, Research associate in the Potential Fields group; Research interests: interpretation and modeling of satellite gravity and magnetic data and airborne gravity data, processing and modeling within the DESIRE project (Dead Sea density structure from 3D modeling); Hobbies: cooking, Go. Timo Damm Aysun Nilay Dinc Born 1979 in Aurich; Studied Physics in Berlin; since 2005 in Kiel; PhD Student in the Potential Fields group; Research interests: geodata management, stereo visualization, algorithms, physics; Hobbies: the university, spending time with my wife, computers. Born 1978 in Istanbul; Studied Geophysics in Istanbul; since 2005 in Kiel; PhD student in the Applied Geophysics group; Research interests: Seismology, tomography, geological and tectonic evolution of subduction zones in Central America; Hobbies: painting, travelling. Yvonne Dzierma Cyrill Eckhardt Born 1980 in Schwelm; Studied Physics in Bonn; since 2005 in Kiel; PhD student in the Applied Geophysics group; Research interests: Seismology, receiver functions, subduction zone in Central America Hobbies: test new stuff (countries, food, (water)sports). Born 1977 in Schmalkalden; Studied Geophysics in Leipzig; since 2005 in Kiel; PhD student in the Applied Geophysics group; Research interests: Seismology, crustal and mantle structure, anisotropy beneath Germany, receiver functions; Hobbies: sailing. Prof. Dr. Hans-Jürgen Götze Prof. Dr. Ron Hackney Born in Halle/Saale; Studied Geophysics in Clausthal-Zellerfeld; PhD 1976 in ClausthalZellerfeld; since 2004 in Kiel; Professor of Potential Fields; Research interests: interdisciplinary interpretations and research in geology and Geophysics, numerical modeling, the Andes of South America; Hobbies: playing viola, chamber music, being a grandfather. Born 1972 in Canberra; Studied Geology in Canberra, graduating in 1993; PhD 2002 in Perth; since 2004 in Kiel; Junior Professor for Solid Earth Geophysics; Research interests: almost everything, sometimes too much; Hobbies: being a dad.

22 Fabian Hese Prof. apl. Dr. Peter Janle Born 1972 in Berlin; Studied Geology in Berlin; since 2005 in Kiel; PhD student in the Potential Fields group; Research interests: Gravimetry, 3D density/structural modelling in the German North Sea area, basin tectonics and buried Caledonian collision zones; Hobbies: playing violin, classical music, photography. Born: 1943 in Herzhorn; Studied Geophysics in Hamburg; PhD 1973 in Hamburg; since 1977 in Kiel; retired Research associate at University of Kiel; Research interest: gravity and sea wave induced microseismics, planetology. Birger Lahrmann Dr. Rezene Mahatsente Born 1976 in Ankum; Studied Geophysics in Münster and Environmental Science in Vechta; since 2005 in Kiel; PhD Student in the Potential Fields group; Research interests: Gravimetry, 3D density modeling of the subduction zone in Central America; Hobbies: Books, games, martial arts. Born in Asmara; Studied Physics in Addis Abeba and Geophysics in ClausthalZellerfeldt; PhD 1998 in Clausthal-Zellerfeldt; since 2005 in Kiel; Research associate in the Potential Fields group; Research Interests: Geodynamics, interaction of the lithosphere with the mantle, driving mechanisms of plate motion, thermal and dynamic evolution of subduction; Hobbies: cycling, hiking, reading. Prof. Dr. Rolf Meissner Dr. Christof Müller Born 1925 in Dortmund; Studied Geophysics in Frankfurt am Main; PhD 1955 in Frankfurt am Main; since 1969 in Kiel; Emeritus Professor of Geopyhsics; Reseach interests: structure and rheology of the crust, engineering geophysics. born 1967 in Eschweiler; Studied Physics in Aachen and Berlin; PhD 2000 in Kiel; since 1997 in Kiel; Research associate in Applied Geophysics; Research interests: near surface 3D seismic investigation; Hobbies: videography, 3D computer animation. Hauke Petersen Prof. Dr. Wolfgang Rabbel Born 1968 in Schleswig; Studied Geophysics at University Kiel; Research associate in the Applied Geophysics working group; Research interests: near-surface applications (soil investigations, archeometry); Hobbies: badminton, football (soccer). Born 1957 in Bremerhaven; Studied Geophysics in Kiel; PhD 1987 in Kiel since 1977 in Kiel; Professor of Applied Geophysics; Research interests: nearsurface geophysics, active and passive seismic investigations from local to global scales; Hobbies: arts and chocolate. Javier R. Sánchez Rojas Dr. Sabine Schmidt Born in Maracay; Studied Engineering Geophysics in Caracas; since 2007 in Kiel; PhD Student in the Potential Field group; Research interests: interdisciplinary 3D modelling of the interaction between the Caribbean and South American plates in western Venezuela; Hobbies: origami, science fiction, computers games, running, cycling. Born in Georgsdorf; Studied Geophysics in Clausthal-Zellerfeld; PhD 1985 in ClausthalZellerfeld; since 2004 in Kiel; Senior scientist in the Potential Fields group; Research interests: processing, organisation, interpretation and visualisation of potential field and many other forms of geophysical data; Hobbies: P3 (playing violin, plants and painting). Dr. Matthias Strahser Dr. Harald Stümpel Born 1976 in Kiel; Studied Geophysics in Kiel and Luleå; since 1976 in Kiel; Research associate in the Applied Geophysics group; Research interests: applied near surface seismoelectrics; Hobbies: outdoors, nature, languages. Born 1944 in Schillerslage; Studied Geophysics in Kiel; PhD in Kiel; senior scientist in the Applied Geophysics group; Research interests: near-surface geophysics at archaeological sites; Hobbies: italian food and science fiction.

23 Dr. Martin Thorwart Diana Wagner Born 1974 in Nürtingen; Studied Geophysics in Frankfurt am Main; PhD 2005 in Hamburg; since 2004 in Kiel; Research associate in the Applied Geophysics group; Research interestd: seismology, fluids in subduction zones, non-volcanic tremor in Central America; Hobbies: reading, puzzles, games, cooking. Born 1977 in Kehl; Studied Geophysics in Karlsruhe; since 2004 in Kiel; PhD student in the Applied Geophysics group; Research interests: active seismology, tomography of the Sunda arc subduction zone, Indonesia; Hobbies: sport, puzzles, trecking. Dennis Wilken Dr. Susanne Wölz Born 1979 in Oldenburg; Studied Physics in Kiel; since 2000 in Kiel; PhD student in the Applied Geophysics group; Research interestd: Evolution of white dwarf stars, seismic site investigations for offshore buildings; Hobbies: vehicles with two wheels, medieval role playing, extensive moviesessions, music. Born 1966 in Kleinmachnow; Studied Geophysics in Berlin; since 1996 in Kiel; PhD 2003 in Kiel; Research associate in the Applied Geophysics group; Research interests: Multi-component and 3D seismology on- and offshore, Archaeogeophysics; Hobbies: skiing, diving, singing in a choir, art. Technical and Admin Staff Gudrun Reim Kathleen Helbig Born 1945 in Schleswig/Schleswig-Holstein; since 1986 in Kiel; technical drawer; Hobbies: cycling, volleyball, sailing, reading. Born 1948 in Edinburgh; since 1972 in Kiel secretary of Geophysics section; Hobbies: dancing, hill walking, grandchildren. Ercan Erkul Detlef Schulte-Kortnack Born 1965 in Izmir; Studied geophysics in Izmir and Kiel; since 1987 in Kiel; Technical associate; Scientific interests: mobile multisensor measurements; Hobbies: sport, traveling. Born 1960 in Kiel; Studied precision engineering in Kiel; since 1960 in Kiel; Technical associate; Scientific interests: development of computer based devices (measurement and control engineering). Diploma students Peter Günther Claudia Haase Born 1977 in Hamburg; since 1999 in Kiel; Member of the Applied Geophysics group; Research project: marine 2D seismology; Hobbies: reading, surfing. Born 1981 in Bremerhaven; since 2001 in Kiel; Member of the Potential Fields group Research project: Joint inversion of potential field data; Hobbies: my motorbike, music, dancing, friends. Ali Ismael Katja Iwanowski Born 1971 in Adla; since 2002 in Kiel; Member of the Applied Geophysics group; Research project: Archeometry; Hobbies: soccer, reading. Born 1981 in Kiel; since 1981 in Kiel; Member of the Applied Geophysics group; Research project: Seismoelectrics; Hobbies: role playing, fencing.

24 Tobias Jokisch Born 1980 in Kiel; Studied Geophysics in Kiel and Longyearbyen; since 2000 in Kiel; Member of the Applied Geophysics group; Research project: marine high resolution 3D seismo-acoustics; Hobbies: sailing, climbing, dancing, telemarking, hiking, music. Christina Klein Born 1978 in Kappeln; Studied Geophysics in Kiel; since 1999 in Kiel; Member of the Applied Geophysics group; Research project: Archaeogeophysics; Hobbies:sailing, nature, cinema. Falko Oestmann Jan Palic Born 1977 in Walsrode; since 2001 in Kiel; Member of the Applied Geophysics group; Research project: Georadar & geomagnetics; Hobbies: soccer, jogging, making music. Born 1978 in Bremen; since 1999 in Kiel; Member of the Applied Geophysics group; Research project: 3D seismic; Hobbies: mathematics, computer science and administration, role-play games. Guests Berna Tunc Nuray Alpaslan Born 1973 in Izmit; Studied Geophysics in Kocaeli; PhD student in Kocaeli; Guest in the Applied Geophysics group; Research interests: tomography of Marmara region; Hobbies: tennis, puzzles. Born 1972 in Agri; Studied Geophysics in Istanbul; PhD student in Kocaeli; Guest in the Applied Geophysics group; Research interest: archaeogeophysics, geomagnetics Hobbies: reading, trekking. Ezequel Garcia Morabito Kerem Ökzap Born 1979 in Bahia Blanca; Studied Geology in Buenos Aires; PhD student in Buenos Aires; Guest in the Potential Fields group; Research interests: Andean tectonics and structural geology; Hobbies: traveling, reading. Born 1983 in Adapazari; Studied Geophysics in Kocaeli; Guest in the Applied Geophysics group; Research interests: shallow seismic methods; Hobbies: swimming, cinema and traveling. If you like the newsletter or even if you do not, if you have commentaries or other feedback, please send any comments to Ron, Martin or Susi: rhackney [at] geophysik.uni-kiel.de, thorwart [at] geophysik.uni-kiel.de or swoelz [at] geophysik.uni-kiel.de We would be more than happy to hear from you. The editors.