thumbnail

Seismic amplitude measurements suggest foreshocks have different focal mechanisms than aftershocks

Science

By:
, , and

Links

  • The Publications Warehouse does not have links to digital versions of this publication at this time
  • Download citation as: RIS

Abstract

The ratio of the amplitudes of P and S waves from the foreshocks and aftershocks to three recent California earthquakes show a characteristic change at the time of the main events. As this ratio is extremely sensitive to small changes in the orientation of the fault plane, a small systematic change in stress or fault configuration in the source region may be inferred. These results suggest an approach to the recognition of foreshocks based on simple measurements of the amplitudes of seismic waves. Copyright ?? 1978 AAAS.

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Seismic amplitude measurements suggest foreshocks have different focal mechanisms than aftershocks
Series title:
Science
Volume
201
Issue:
4350
Year Published:
1978
Language:
English
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
Larger Work Title:
Science
First page:
56
Last page:
59
Number of Pages:
4