Ground Failure Observations from Recent Earthquakes

alex grant


Date & Time
Building 3, Rambo Auditorium
Rob Skoumal

Recent earthquakes in Hokkaido Japan (M6.6, Sept 5) and Anchorage, AK (M7.0, Nov 30) triggered landslides and lateral spreads of radically different severity and consequences. In Hokkaido, over 6,000 landslides have been mapped to date from the highly destructive Sept. 5 M6.6 earthquake, resulting in damages to ~9,000 residential dwellings. Conversely, ground failures and damage to property appear to be limited from the Nov. 30 M7.0 Anchorage earthquake, where widespread reports of two road damaging landslides reflect exceptional ground-failures from otherwise muted consequences. In this talk I will discuss observations from reconnaissance efforts for both earthquakes focused on cataloging and digital preservation of ground failures and ground truthing of the USGS Ground-Failure product. I will also contrast coseismic ground failures triggered by these earthquakes and the potential trends they represent.

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