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Dilational Processes Accompanying Earthquakes in the Long Valley Caldera

Dreger, Douglas; Tkalcic, Hrvoje; Johnston, Malcolm


Regional distance seismic moment tensor determinations and broadband waveforms of moment magnitude 4.6 to 4.9 earthquakes from a November 1997 Long Valley Caldera swarm, during an inflation episode, display evidence of anomalous seismic radiation characterized by non-double couple (NDC) moment tensors with significant volumetric components. Observed coseismic dilation suggests that hydrothermal or magmatic processes are directly triggering some of the seismicity in the region. Similarity in the...[Show more]

CollectionsANU Research Publications
Date published: 2000
Type: Journal article
Source: Science
DOI: 10.1126/science.288.5463.122


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