The Coalinga, California, earthquake of May 2, 1983

Professional Paper 1487
Edited by: Michael J. Rymer and William L. Ellsworth



At 2342 G.m.t. May 2, 1983, a magnitude (ML) 6.7 earthquake occurred about 12 km northeast of the town of Coalinga, approximately halfway between Los Angeles and San Francisco. The shock was felt from Los Angeles to 200 km north of Sacramento and as far east as Las Vegas. Unlike other well-documented, major earthquakes in California in the 20th century, this event was not associated with any previously known or suspected active fault. Comprehensive geologic and geophysical investigations begun soon after the event have demonstrated the absence of a near-surface fault responsible for the earthquake. Instead, the earthquake was closely associated with a fault zone concealed beneath folds developed along the structural boundary between the Coast (Diablo) Ranges and the San Joaquin Valley.

Publication type Report
Publication Subtype USGS Numbered Series
Title The Coalinga, California, earthquake of May 2, 1983
Series title Professional Paper
Series number 1487
DOI 10.3133/pp1487
Year Published 1990
Language English
Publisher U.S. Government Printing Office
Publisher location Washington, D.C.
Description Report: iv, 417 p.; 4 Plates: 39.5 x 43.0 inches or smaller
Country United States
State California
City Coalinga
Google Analytic Metrics Metrics page
Additional publication details