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Science 25 March 1983:
Vol. 219. no. 4591, pp. 1432 - 1433
DOI: 10.1126/science.219.4591.1432
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Articles

Spasmodic Tremor and Possible Magma Injection in Long Valley Caldera, Eastern California

ALAN RYALL 1 and FLORIANA RYALL 1

1 Seismological Laboratory, University of Nevada, Reno 89557

Intensive microearthquake swarms with the appearance of volcanic tremor have been observed in the southwest part of Long Valley caldera, southeastern California. This activity, possibly associated with magma injection, began 6 weeks after several strong (magnitude 6+) earthquakes in an area south of the caldera and has continued sporadically to the present time. The earthquake sequence and magmatic activity are part of a broad increase in tectonic activity in a 15,000-square-kilometer region surrounding the "White Mountains seismic gap," an area with high potential for the next major earthquake in the western Great Basin.

Submitted on July 6, 1982
Revised on December 16, 1982


THIS ARTICLE HAS BEEN CITED BY OTHER ARTICLES:
Faulting in the 1986 Chalfant, California, Sequence: Local Tectonics and Earthquake Source Parameters.
(2000)
Bulletin of the Seismological Society of America 90, 813-831
Source parameters and tectonic setting of the 1990 Lee Vining, California, earthquake sequence.
S. P. Horton, D. M. dePolo, and W. R. Walter (1997)
Bulletin of the Seismological Society of America 87, 1035-1045
   Abstract »    PDF »
The 1989 earthquake swarm beneath Mammoth Mountain, California: An initial look at the 4 May through 30 September activity.
D. P. HILL, W. L. ELLSWORTH, M. J. S. JOHNSTON, J. O. LANGBEIN, D. H. OPPENHEIMER, A. M. PITT, P. A. REASENBERG, M. L. SOREY, and S. R. MCNUTT (1990)
Bulletin of the Seismological Society of America 80, 325-339
   Abstract »    PDF »
Decrease in Deformation Rate Observed by Two-Color Laser Ranging in Long Valley Caldera.
M. F. Linker, M. F. LINKER, J. O. LANGBEIN, and A. MCGARR (1986)
Science 232, 213-216
   Abstract »    PDF »


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