SEISMIC REGIME OF SOUTHERN CALIFORNIA IN RELATION TO THE CRUSTAL RIGIDITY VARIATIONS
Rubrics: ORIGINAL ARTICLES
Authors:
1.
Schmidt United Institute of Physics of the Earth, Russian Academy of Sciences
2.
Schmidt United Institute of Physics of the Earth, Russian Academy of Sciences
Type:
Article
Pages:
from 67
to 73
Status:
Published
Received:
25.02.2003
Accepted:
25.02.2003
Published:
25.02.2003
Language:
English
Keywords:
seismic regime, Southern California, crustal rigidity, earthquakes, arrival patterns.
Abstract (English):
The Landers southern California destructive M = 7.3 earthquake of June 28, 1992 had epicentral coordinates of 34.2o N, 116.44o W and was a major seismic event of the period from 1985 through 2002. It was examined in many papers, mostly published in a special issue of Bulletin of Seismological Society of America BSSA of June 1994 vol.84, no.3. The majority of the works were devoted to phenomena related to the earthquake itself and its effects. The present paper presents the results derived from the analysis of rigidity variations at the preparation stage of the main shock. This analysis was based on a method developed by the authors for the monitoring of rigidity variations in the seismically active layer of the crust. The method reduces to the possibility of discriminating between the brittle and viscous failure modes using P wave first arrival patterns.
The Landers southern California destructive M = 7.3 earthquake of June 28, 1992 had epicentral coordinates of 34.2o N, 116.44o W and was a major seismic event of the period from 1985 through 2002. It was examined in many papers, mostly published in a special issue of Bulletin of Seismological Society of America BSSA of June 1994 vol.84, no.3. The majority of the works were devoted to phenomena related to the earthquake itself and its effects. The present paper presents the results derived from the analysis of rigidity variations at the preparation stage of the main shock. This analysis was based on a method developed by the authors for the monitoring of rigidity variations in the seismically active layer of the crust. The method reduces to the possibility of discriminating between the brittle and viscous failure modes using P wave first arrival patterns.
Keywords:
seismic regime, Southern California, crustal rigidity, earthquakes, arrival patterns.
seismic regime, Southern California, crustal rigidity, earthquakes, arrival patterns.
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