Low-Stress-Drop, Low-Magnitude Earthquake with Surface Faulting: The Imperial, California, Earthquake of March 4, 1966
- Creators
- Brune, James N.
- Allen, Clarence R.
Abstract
Right-lateral surface displacement reaching a maximum of 1 1/2 cm occurred over a 10-km section of the Imperial fault in association with a magnitude 3.6 earthquake on March 4, 1966, the smallest known earthquake yet associated with surface displacement. The displacement is documented by field observations of en echelon cracking in pavement and the offset of the white center line of Highway 80. The shallow depth of the earthquake source, the high excitation of waves in the top layer of sediments and of love waves of 8-15 sec periods, the distribution of aftershocks, and the agreement between the source moment as calculated from the observed faulting and from the amplitudes of love waves supports the association of the observed displacement with the March 4 earthquake.
Additional Information
© 1968 Geological Society of America.Additional details
- Eprint ID
- 50896
- Resolver ID
- CaltechAUTHORS:20141028-073926940
- Created
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2014-10-28Created from EPrint's datestamp field
- Updated
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2019-10-03Created from EPrint's last_modified field
- Series Name
- Special papers (Geological Society of America)
- Series Volume or Issue Number
- 115