Submarine landslides at the eastern Sunda margin: observations and tsunami impact assessment |
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| Authors: | Brune Sascha Ladage Stefan Babeyko Andrey Y Müller Christian Kopp Heidrun Sobolev Stephan V |
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| Institution: | (1) Helmholtz Centre Potsdam GFZ German Research Centre for Geosciences, Telegrafenberg, 14473 Potsdam, Germany;(2) Federal Institute for Geosciences and Natural Resources (BGR), Stilleweg 2, 30655 Hannover, Germany;(3) Leibniz Institute of Marine Sciences at the Christian-Albrechts University of Kiel (IFM-GEOMAR), Wischhofstr. 1-3, 24148 Kiel, Germany |
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| Abstract: | Our analysis of new bathymetric data reveals six submarine landslides at the eastern Sunda margin between central Java and
Sumba Island, Indonesia. Their volumes range between 1 km3 in the Java fore-arc basin up to 20 km3 at the trench off Sumba
and Sumbawa. We estimate the potential hazard of each event by modeling the corresponding tsunami and its run-up on nearby
coasts. Four slides are situated remarkably close to the epicenter of the 1977 tsunamigenic Sumba M
w
= 8.3 earthquake. However, comparison of documented tsunami run-up heights and arrival times with our modeling results neither
allows us to confirm nor can we falsify the hypothesis that the earthquake triggered these submarine landslides. |
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