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Past earthquakes triggered large rockslides in the Eastern Alps


Past earthquakes triggered large rockslides in the Eastern Alps
16.02.2021
Geologists from the University of Innsbruck shed new light on a long-lasting debate about the trigger mechanism of large rockslides. Lake mud in two Alpine lakes in Tyrol reveal that rare strong earthquakes are the final cause of multiple, prehistoric rockslides in the Eastern Alps. The study has now been published in the Journal Nature Communications.
Image: In the 8 m long sediment cores the geologists found different types of earthquake traces. The picture shows the Plansee in Reutte, Tyrol.
(Credit: Jasper Moernaut)
Many steep valleys in the European Alps show the relicts of large rockslides, during which several hundreds of million cubic metres of rocks get instable, collapse and impact everything on their path. “For most of these, we still do not know how they are caused, because these rockslides occurred long before the start of written history in the region about 1000 y ....

Patrick Oswald , Jasper Moernaut , Christa Hammerl , Michael Strasser , Tyrolean Science Fund , Austrian Science Fund , Austrian Academy Of Sciences , Department Of Geology , European Regional Development Fund Interreg , University Of Innsbruck , Austrian Central Institute For Meteorology , European Alps , Sedimentary Geology , Austrian Core Facility , Austrian Central Institute , Eastern Alps , Austrian Academy , பேட்ரிக் ஆஸ்வால்ட் , மைக்கேல் ஸ்ட்ராஸர் , ஆஸ்திரேலிய அறிவியல் நிதி , ஆஸ்திரேலிய கலைக்கழகம் ஆஃப் அறிவியல் , துறை ஆஃப் புவியியல் , பல்கலைக்கழகம் ஆஃப் இந்ந்‌ஸ்ப்ரக் , ஆஸ்திரேலிய மைய நிறுவனம் க்கு வானிலை ஆய்வு , ஐரோப்பிய ஆல்ப்ஸ் , ஆஸ்திரேலிய கோர் வசதி ,