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Observation of the seismic nucleation phase in the Ridgecrest, California, earthquake sequence

Geophysical Research Letters

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Abstract

Near-source observations of five M 3.8-5.2 earthquakes near Ridgecrest, California are consistent with the presence of a seismic nucleation phase. These earthquakes start abruptly, but then slow or stop before rapidly growing again toward their maximum rate of moment release. Deconvolution of instrument and path effects by empirical Green's functions demonstrates that the initial complexity at the start of the earthquake is a source effect. The rapid growth of the P-wave arrival at the start of the seismic nucleation phase supports the conclusion of Mori and Kanamori [1996] that these earthquakes begin without a magnitude-scaled slow initial phase of the type observed by Iio [1992, 1995].

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Observation of the seismic nucleation phase in the Ridgecrest, California, earthquake sequence
Series title:
Geophysical Research Letters
Volume
25
Issue:
3
Year Published:
1998
Language:
English
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
First page:
401
Last page:
404
Number of Pages:
4