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Tilt measurements at Long Valley caldera, California, May-August 1982

Open-File Report 82-893

By:
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Abstract

The Mammoth Lakes area in east-central California has experienced unusual seismicity and ground deformation since 1978, highlighted by four M>6 earthquakes in May 1980 and by the discovery soon thereafter of a broad uplift within Long Valley caldera. Recurrent seismic swarms during June 1980-May 1982 raised concern over the possibility of renewed volcanic activity in the foreseeable future, prompting a USGS Notice of Potential Volcanic Hazard on 28 May 1982. As part of an intensified Long Valley monitoring effort sponsored by the USGS Volcanic Hazards Program, a network of nine tilt sites was established near Mammoth Lakes in May and July 1982. This report describes those stations and presents results from three tilt resurveys during July-August 1982.

Additional Publication Details

Publication type:
Report
Publication Subtype:
USGS Numbered Series
Title:
Tilt measurements at Long Valley caldera, California, May-August 1982
Series title:
Open-File Report
Series number:
82-893
Edition:
-
Year Published:
1982
Language:
ENGLISH
Publisher:
U.S. Geological Survey,
Description:
34 p. ill., maps ;28 cm.