Evidence for rainfall-triggered earthquake activity

Details Evidence for rainfall-triggered earthquake activity Evidence for rainfall-triggered earthquake activity

Oct 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006georl..3319303h&link_type=abstract

Geophysical Research Letters, Volume 33, Issue 19, CiteID L19303

Physics

15

Seismology: Earthquake Dynamics (1242), Seismology: Earthquake Source Observations (1240), Seismology: Earthquake Interaction, Forecasting, And Prediction (1217, 1242), Seismology: Seismicity And Tectonics (1207, 1217, 1240, 1242), Structural Geology: Role Of Fluids

Scientific paper

Fluids are known to be of major importance for the earthquake generation because pore pressure variations alter the strength of faults. Thus they can initiate earthquakes if the crust is close enough to its critical state. Based on the observations of the isolated seismicity below the densely monitored Mt. Hochstaufen, SE Germany, we are now able to demonstrate that the crust can be so close-to-failure that even tiny pressure variations associated with precipitation can trigger earthquakes in a few kilometer depth. We find that the recorded seismicity is highly correlated with the calculated spatiotemporal pore pressure changes due to diffusing rain water and in good agreement with the response of faults described by the rate-state friction law.

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