[1] 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 erupt...

Connecting earthquake nucleation in basement rock to fluid injection basal, sedimentary reservoirs, depends heavily on choices related the poroelastic properties of fluid-rock system, thermo-chemical effects notwithstanding. Direct constraints these parameters outside laboratory settings are rare, and it is commonly assumed that layers isotropic. With Arbuckle wastewater disposal reservoir Osag...

Teleseismic P waves are followed by a series of scattered waves, particularly P-to-S converted phases, that form a coda. The sequence of scattered waves on the horizontal components can be represented by the receiver function (RF) for the station and may vary with the approach angle and azimuth of the incoming P wave. We have developed a frequency-domain RF inversion algorithm using multiple-ta...