Mapping the source of strong earthquakes by use of the regional distribution of the co-seismic landslides
Abstract
We have documented the regional pattern of the landslides triggered by the the Mw=6.8 Chüetsu (2004, Japan) and the Mw=6.8 Iwate-Miyagi (2008, Japan) earthquakes. In our model, we use a simple analog to the seismic wave attenuation law to describe the decay of landslide density with distance to the source trigger. Once corrected from both first-order topographic and lithological variability, the best point source inferred from the spatial decay of the landslide density converges toward the area of high slip on the rupture plan. This work opens new opportunities in the investigation of non-instumented or historical earthquake sources by use of their coseismic landslide database.
- Publication:
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AGU Fall Meeting Abstracts
- Pub Date:
- December 2011
- Bibcode:
- 2011AGUFMNH23A1539M
- Keywords:
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- 1810 HYDROLOGY / Debris flow and landslides;
- 7215 SEISMOLOGY / Earthquake source observations;
- 8175 TECTONOPHYSICS / Tectonics and landscape evolution;
- 4313 NATURAL HAZARDS / Extreme events