Landslide basal friction as measured by seismic waves

Details Landslide basal friction as measured by seismic waves Landslide basal friction as measured by seismic waves

Dec 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003georl..30xsde1b&link_type=abstract

Geophysical Research Letters, Volume 30, Issue 24, pp. SDE 1-1, CiteID 2236, DOI 10.1029/2003GL018485

Physics

4

Seismology: Earthquake Dynamics And Mechanics, Seismology: Volcano Seismology (8419), Volcanology: Eruption Monitoring (7280)

Scientific paper

Dynamical predictions of landslide runout require measurements of the basal friction. Here we present the first seismically determined bounds on the frictional coefficients for three large volcanic landslides. The three landslides (Bezymianny, Russia 1956, Sheveluch, Russia 1964 and Mount St. Helens, USA 1980) have masses that vary by a factor of 5 and were all followed immediately by eruptions. We use teleseismic and regional seismic data to show that all three landslides are consistent with an apparent coefficient of friction of 0.2 which corresponds to an actual areally-averaged frictional coefficient of 0.2-0.6. The apparent friction is independent of the quantity of hot gas subsequently released.

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