3D attenuation model of Long Valley Caldera (CA)

Janire Prudencio & Michael Manga
Unrest at Long Valley caldera, California has been attributed to magma recharge or the ascent of hydrothermal fluids. The difference is critical for assessing volcanic hazard. To better constrain subsurface structures in the upper crust and to help distinguish between these two competing hypotheses for the origin of unrest, we model the 3D seismic attenuation structure by analyzing more than 47000 vertical waveforms with the coda normalization method. We identify high attenuation anomalies in the...
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