CaltechAUTHORS
  A Caltech Library Service

Slip on the Superstition Hills fault and on nearby faults associated with the 24 November 1987 Elmore Ranch and Superstition Hills earthquakes, southern California

McGill, Sally F. and Allen, Clarence R. and Hudnut, Kenneth W. and Johnson, David C. and Miller, Wayne F. and Sieh, Kerry E. (1989) Slip on the Superstition Hills fault and on nearby faults associated with the 24 November 1987 Elmore Ranch and Superstition Hills earthquakes, southern California. Bulletin of the Seismological Society of America, 79 (2). pp. 362-375. ISSN 0037-1106. http://resolver.caltech.edu/CaltechAUTHORS:20140415-081920776

[img]
Preview
PDF - Published Version
See Usage Policy.

898Kb

Use this Persistent URL to link to this item: http://resolver.caltech.edu/CaltechAUTHORS:20140415-081920776

Abstract

Alignment arrays and creepmeters spanning several faults in southern California recorded slip associated with the 24 November 1987 Elmore Ranch and Superstition Hills earthquakes. No precursory slip had occurred on the Superstition Hills fault up to 27 October 1987, when the last measurement before the earthquakes was made. About 23 days before the earthquake, dextral creep events of about 13 mm and 0.5 mm may have occurred simultaneously on the Imperial and southern San Andreas faults, respectively, but the tectonic origin of the smaller event is questionable. Within 12 hr after the Superstition Hills earthquake, 20.9 cm of dextral slip occurred on the main fault trace at the Superstition Hills alignment array, and 39.8 cm of dextral slip was recorded over the entire 110-m width of the array. Despite this initial wide distribution of slip, nearly all of the postseismic slip is occurring on the main fault trace. As of 3 August 1988, the alignment array had recorded a total of 80.2 cm of dextral slip. As of 5 days after the earthquakes, 65 to 80 per cent of the total slip measured by the alignment array had occurred on discrete, mappable fractures. In addition, the two earthquakes triggered slip on the Coyote Creek fault, the southern San Andreas fault, and on the Imperial fault. Telemetered data from creepmeters on the southern San Andreas and Imperial faults indicate that triggered slip began there within 3 min or less of each of the two earthquakes. Additional triggered slip occurred on the Imperial fault beginning 3.5 hr after the second earthquake.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://www.bssaonline.org/content/79/2/362.abstractPublisherArticle
ORCID:
AuthorORCID
Hudnut, Kenneth W.0000-0002-3168-4797
Sieh, Kerry E.0000-0002-7311-2447
Additional Information:© 1989 Seismological Society of America. Manuscript received 15 August 1988. This work was supported by USGS Grant 14-08-0001-G1177 and by funds from the Caltech Earthquake Research Associates.
Funders:
Funding AgencyGrant Number
USGS 14-08-0001-G1177
Caltech Earthquake Research AssociatesUNSPECIFIED
Record Number:CaltechAUTHORS:20140415-081920776
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:20140415-081920776
Official Citation:Sally F. McGill, Clarence R. Allen, Kenneth W. Hudnut, David C. Johnson, Wayne F. Miller, and Kerry E. Sieh Slip on the Superstition Hills fault and on nearby faults associated with the 24 November 1987 Elmore Ranch and Superstition Hills earthquakes, southern California Bulletin of the Seismological Society of America April 1989 79:362-375
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:44944
Collection:CaltechAUTHORS
Deposited By: Ruth Sustaita
Deposited On:15 Apr 2014 15:39
Last Modified:08 Feb 2017 23:19

Repository Staff Only: item control page