Bulletin of the Seismological Society of America
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Bulletin of the Seismological Society of America; February 2006; v. 96; no. 1; p. 69-79; DOI: 10.1785/0120040206
© 2006 Seismological Society of America
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Non-Double-Couple Earthquakes in the Long Valley Volcanic Region

Dennise C. Templeton1 and Douglas S. Dreger1

1 Berkeley Seismological Laboratory
215 McCone Hall, UC Berkeley
Berkeley, California 94720-4760


Figure 001
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Figure 1. Area map showing location of the Long Valley caldera, Mono-Inyo volcanic chain, and major Sierra Nevada frontal faults. Northern California Seismic Network (NCSN) catalog seismicity between 1980 and 2000 shown as small gray dots. Inset map of California shows the distribution of stations used in this study. Rectangle delineates area plotted in Figure 2.

 

Figure 002
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Figure 2. Graphical moment tensor results. DC solutions shown in black. DC + isotropic solutions shown as dark gray. Full moment tensor solutions shown as light gray. Date of event shown as YY.MMDD.

 

Figure 003
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Figure 3. Data, DC model synthetics, deviatoric model synthetics, DC + isotropic model synthetics, and full moment tensor model synthetics filtered between 0.02 and 0.05 Hz for all three components at station SAO for DC + isotropic event 11 in units of centimeters.

 

Figure 004
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Figure 4. Best solution for event 11 showing data in dotted black lines and DC + isotropic model synthetics in solid black lines in units of centimeters.

 

Figure 005
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Figure 5. A representative set of focal mechanism solutions of jackknife test results for DC event 15, DC + isotropic event 11, and full moment tensor event 10. Station code is B = BKS, C = CMB, M = MHC, O = ORV, P = PKD, and S = SAO.

 





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