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Detailed Reference Information
Gritto et al. 2004
Gritto, R., Romero, A.E. and Daley, T.M. (2004). Results of a VSP experiment at the Resurgent Dome, Long Valley caldera, California. Geophysical Research Letters 31: doi: 10.1029/2004GL019451. issn: 0094-8276.

A vertical seismic profiling experiment has been conducted at the DOE well LVF 51--20 at the resurgent dome at Long Valley caldera, California. The current paper is intended to report the velocity results derived from this experiment to seismically constrain the area around the resurgent dome. We report the results of velocity logs, Vp/Vs ratios, and VpVs products for the depth interval from 880--1980 m. The Bishop tuff can be divided into three zones (top-to-bottom) of intermediate velocities (Vp ≈ 4.0 km/s, Vs ≈ 2.3 km/s), followed by higher velocities (Vp = 4.7 km/s, Vs = 2.9 km/s) in the lower-central part, and a decrease back to the lower values at the bottom of the sequence. The analysis of VpVs data suggested a decrease in porosity in the lower-central section of the tuff as a possible explanation, which was supported by direct density measurements from a nearby location.

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Abstract

Keywords
Seismology, Body wave propagation, Seismology, Continental crust, Seismology, Volcano seismology
Journal
Geophysical Research Letters
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Publisher
American Geophysical Union
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