Growth of a tectonic ridge during the Landers earthquake
Abstract
The formation of tectonic ridges by localized vertical uplift along strike-slip faults has long been suspected, but the actual growth of a tectonic ridge during an earthquake has never been documented. During the 1992 Landers, California, earthquake sequence, an awl-shaped, dome-like topographic ridge along the Emerson fault zone increased its height at least 1 m concurrently with 3 m of right-lateral shift across the fault zone containing the ridge. Five deformation vectors within the ridge reveal dilatant behavior in addition to the uplift and shift on boundary faults.
- Publication:
-
Geology
- Pub Date:
- April 1997
- DOI:
- 10.1130/0091-7613(1997)025<0323:GOATRD>2.3.CO;2
- Bibcode:
- 1997Geo....25..323F