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32 results on '"Klingelhöfer, Frauke"'

3. Seismo-stratigraphic Mapping Guided by Magnetic Anomalies Stripes: Assessing Opening Models for the Eastern Algerian Oceanic Domain

Author

Haidar, Shaza, Déverchère, Jacques, Arab, Mohamed, Klingelhoefer, Frauke, Graindorge, David, Medaouri, Mourad, Pisello, Anna Laura, Editorial Board Member, Hawkes, Dean, Editorial Board Member, Bougdah, Hocine, Editorial Board Member, Rosso, Federica, Editorial Board Member, Abdalla, Hassan, Editorial Board Member, Boemi, Sofia-Natalia, Editorial Board Member, Mohareb, Nabil, Editorial Board Member, Mesbah Elkaffas, Saleh, Editorial Board Member, Bozonnet, Emmanuel, Editorial Board Member, Pignatta, Gloria, Editorial Board Member, Mahgoub, Yasser, Editorial Board Member, De Bonis, Luciano, Editorial Board Member, Kostopoulou, Stella, Editorial Board Member, Pradhan, Biswajeet, Editorial Board Member, Abdul Mannan, Md., Editorial Board Member, Alalouch, Chaham, Editorial Board Member, O. Gawad, Iman, Editorial Board Member, Nayyar, Anand, Editorial Board Member, Amer, Mourad, Series Editor, Meghraoui, Mustapha, editor, Sundararajan, Narasimman, editor, Banerjee, Santanu, editor, Hinzen, Klaus-G., editor, Eshagh, Mehdi, editor, Roure, François, editor, Chaminé, Helder I., editor, Maouche, Said, editor, and Michard, André, editor

Published
2022
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5. Formation, segmentation and deep crustal structure variations along the Algerian margin from the SPIRAL seismic experiment

Author

Klingelhoefer, Frauke, Déverchère, Jacques, Graindorge, David, Aïdi, Chafik, Badji, Rabie, Bouyahiaoui, Boualem, Leprêtre, Angélique, Mihoubi, Abdelhafid, Beslier, Marie-Odile, Charvis, Philippe, Schnurle, Philippe, Sage, Francoise, Medaouri, Mourad, Arab, Mohamed, Bracene, Rabah, Yelles-Chaouche, Abdelkarim, Badsi, Madjid, Galvé, Audrey, and Géli, Louis

Published
2022
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8. Seismic and Acoustic Monitoring of Submarine Landslides: Ongoing Challenges, Recent Successes and Future Opportunities

Author

Bayrakci, Gaye, Klingelhöfer, Frauke, Clare, Michael, Lintern, D. Gwyn, Pope, Ed, Baker, Meg, Ruffell, Sean, Zulkifli, Mohammad, Simmons, Steve, Urlaub, Morelia, Belal, Mohammad, Talling, Peter, Bayrakci, Gaye, Klingelhöfer, Frauke, Clare, Michael, Lintern, D. Gwyn, Pope, Ed, Baker, Meg, Ruffell, Sean, Zulkifli, Mohammad, Simmons, Steve, Urlaub, Morelia, Belal, Mohammad, and Talling, Peter

Abstract

Submarine landslides pose a hazard to coastal communities and critical seafloor infrastructure, occurring on all of the world's continental margins, from coastal zones to hadal trenches. Offshore monitoring has been limited by the largely unpredictable occurrence of submarine landslides and the need to cover large regions. Recent subsea monitoring has provided new insights into the preconditioning and run-out of submarine landslides using active geophysical techniques. However, these tools measure a small spatial footprint and are power- and memory-intensive, thus limiting long-duration monitoring. Most landslide events remain unrecorded. In this chapter, we first show how passive acoustic and seismologic techniques can record acoustic emissions and ground motions created by terrestrial landslides. This terrestrial-focused research has catalyzed advances in characterizing submarine landslides using onshore and offshore networks of broadband seismometers, hydrophones, and geophones. We discuss new insights into submarine landslide preconditioning, timing, location, velocity, and down-slope evolution arising from these advances. Finally, we outline challenges, emphasizing the need to calibrate seismic and acoustic signals generated by submarine landslides. Passive seismic and acoustic sensing has a strong potential to enable more complete hazard catalogs to be built and open the door to emerging techniques (such as fiber-optic sensing) to fill key knowledge gaps.

Published
2024
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9. Limits of the seismogenic zone in the epicentral region of the 26 December 2004 great Sumatra-Andaman earthquake: Results from seismic refraction and wide-angle reflection surveys and thermal modeling

Author

Klingelhoefer, Frauke, Gutscher, Marc-André, Ladage, S., Dessa, J. -X., Graindorge, David, Franke, D., André, C., Permana, Haryadi, Yudistira, T., and Chauhan, Ajay

Subjects
Physics - Geophysics
Abstract

The 26 December 2004 Sumatra earthquake (Mw = 9.1) initiated around 30 km depth and ruptured 1300 km of the Indo-Australian Sunda plate boundary. During the Sumatra OBS (ocean bottom seismometer) survey, a wide angle seismic profile was acquired across the epicentral region. A seismic velocity model was obtained from combined travel time tomography and forward modeling. Together with reflection seismic data from the SeaCause II cruise, the deep structure of the source region of the great earthquake is revealed. Four to five kilometers of sediments overlie the oceanic crust at the trench, and the subducting slab can be imaged down to a depth of 35 km. We find a crystalline backstop 120 km from the trench axis, below the fore arc basin. A high velocity zone at the lower landward limit of the raycovered domain, at 22 km depth, marks a shallow continental Moho, 170 km from the trench. The deep structure obtained from the seismic data was used to construct a thermal model of the fore arc in order to predict the limits of the seismogenic zone along the plate boundary fault. Assuming 100C-150C as its updip limit, the seismogenic zone is predicted to begin 530 km from the trench. The downdip limit of the 2004 rupture as inferred from aftershocks is within the 350C 450C temperature range, but this limit is 210-250 km from the trench axis and is much deeper than the fore arc Moho. The deeper part of the rupture occurred along the contact between the mantle wedge and the downgoing plate.

Published
2010
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23. Coordinating OBS Parks in Europe

Author

Crawford, W., Brisbourne, A., D’Anna, G, Flüh, Ernst R., Galve, A., Graindorge, D., Harmon, N., Henstock, T., Klingelhöfer, Frauke, Mangano, G., Matias, L., Peirce, C., Sallares, V., Schmidt_Aursch, M., Tilman, F., and Voss, P.

Subjects
550 - Earth sciences
Abstract

Within Europe there are more than 380 Ocean Bottom Seismometers (OBS) distributed across 10 instrument parks in 6 countries. At least 120 of these OBS are wideband or broadband, over 260 can be deployed for at least 6 months at a time and 140 for at least one year. New parks are planned in two other European countries, which should add over 70 OBSs to this “fleet”. However, these parks are under the control of individual countries or universities and hence to date this has made it difficult to organize large-scale experiments, especially for seismologists without marine experience. There has recently been an initiative to coordinate the use of these distributed instruments and their data products, to encourage large-scale experiments, possibly with onshore and offshore components, by seismologists who have not necessarily used OBSs before. The ongoing or planned developments include: Helping scientists with marine-specific formalities such as ship requests; clearer explanations of the noise floors of OBS instrumentation; improved clarity of instrument pricing and availability; standardized data output formats and data validation; and archiving in established seismological data centers. These efforts should allow improved experiment design in scientifically interesting regions with an offshore component and an easier, clearer way to organize large-scale, multi-country experiments. We will present details of this initiative to help organize large-scale experiments, the particularities of OBS sensors and marine deployments, the available instrumentation and new developments.

Published
2012

24. Impact of lower plate structure on upper plate deformation at the NW Sumatran convergent margin from seafloor morphology

Author

Graindorge, David, Klingelhoefer, Frauke, Sibuet, Jean-Claude, McNeill, Lisa, Henstock, Timothy J., Dean, Simon, Gutscher, Marc-André, Dessa, Jean Xaver, Permana, Haryadi, Singh, Satish C., Leau, Hélène, White, Nicolas, Carton, Hélène, Malod, Jacques André, Rangin, Claude, Aryawan, Ketut G., Chaubey, Anil Kumar, Chauhan, Ajay, Galih, Dodi R., Greenroyd, Christopher James, Laesanpura, Agus, Prihantono, Joko, Royle, Gillian, and Shankar, Uma

Published
2008
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31. Contributors

Author

Batista, Luis, Boettcher, Margaret S., Çağatay, M. Namık, Şengör, A.M. Celâl, Chamot-Rooke, Nicolas, Delescluse, Matthias, Dellong, David, Dominguez, Stéphane, Fagereng, Åke, Fournier, Marc, Gartman, Amy, Graindorge, David, Gutscher, Marc-André, Hein, James R., Huchon, Philippe, Klingelhoefer, Frauke, Lay, Thorne, Lazar, Michael, MacLeod, Christopher J., Maia, Marcia, Malavieille, Jacques, Natal'in, Boris A., Neres, Marta, Omira, Rachid, Rodriguez, Mathieu, Rutter, Ernest H., Sakellariou, Dimitris, Scharer, Katherine, Searle, Michael P., Streig, Ashley, Tsampouraki-Kraounaki, Konstantina, Uçarkuş, Gülsen, Valetti, Lorenzo, Wallis, David, Wei, Meng, Wessels, Richard J.F., Wolfson-Schwehr, Monica, and Zabcı, Cengiz

Published
2019
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