A Caltech Library Service

Parkfield, California, earthquake of June 27, 1966: A three-dimensional moving dislocation

Trifunac, M. D. and Udwadia, F. E. (1974) Parkfield, California, earthquake of June 27, 1966: A three-dimensional moving dislocation. Bulletin of the Seismological Society of America, 64 (3). pp. 511-533. ISSN 0037-1106.

PDF - Published Version
See Usage Policy.


Use this Persistent URL to link to this item:


Recordings from five strong-motion accelerograph stations have been used to derive a three-dimensional dislocation model for the Parkfield Earthquake. The model consists of a buried fault which extends from a depth of 3 km to a depth of 9 km below the ground surface. It appears from the analysis, which considers various fault lengths, that the zone of significant faulting was the 20-km-long northwestern section of the fault. The rupture velocity has been found to be between 2.4 and 2.5 km/sec and the dislocation amplitudes have been found to be about 120 cm. There have been comparisons made of the model results with geodetic data on static deformations and creep measurements following the event. In contrast with several other source mechanism studies of the Parkfield event, this model yields a picture which appears to be very consistent with both the dynamic strong-motion measurements as well as the available geodetic and creep data.

Item Type:Article
Related URLs:
URLURL TypeDescription
Additional Information:Copyright © 1974, by the Seismological Society of America. Manuscript received October 27, 1973. We are indebted to G. W. Housner and D. E. Hudson of the California Institute of Technology and to J. Anderson of the Lamont-Doherty Geological Observatory of Columbia University for critical reading of the manuscript. This research was supported by the Advanced Research Project Agency of the Department of Defense and was monitored by the Air Force Office of Scientific Research under Contract F44620-72-C-0097.
Funding AgencyGrant Number
Advanced Research Projects Agency (ARPA)UNSPECIFIED
Air Force Office of Scientific Research (AFOSR)F44620-72-C-0097
Issue or Number:3
Record Number:CaltechAUTHORS:20140812-152432517
Persistent URL:
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:48445
Deposited By: George Porter
Deposited On:13 Aug 2014 14:29
Last Modified:03 Oct 2019 07:03

Repository Staff Only: item control page