eprintid: 160
rev_number: 18
eprint_status: archive
userid: 2
dir: disk0/00/00/01/60
datestamp: 2015-02-16 14:44:27
lastmod: 2020-03-24 08:11:53
status_changed: 2015-04-27 07:26:48
type: article
metadata_visibility: show
creators_name: Zaliapin, Ilya
creators_name: Ben-Zion, Yehuda
creators_id: zal@unr.edu
creators_id: 
corp_creators: Department of Mathematics and Statistics, University of Nevada, Reno, NV 89557, USA
corp_creators: Department of Earth Sciences, University of Southern California, Los Angeles, CA 90089-0740, USA
title: Asymmetric distribution of aftershocks on large faults in California
ispublished: pub
subjects: MP2_3
divisions: EPOS-P
full_text_status: none
keywords: Persistence, memory, correlations, clustering; Spatial analysis; Earthquake
dynamics; Earthquake interaction, forecasting, and prediction; Statistical seismology
abstract: We examine the relations between spatial symmetry properties of earthquake patterns along
faults in California (CA) and local velocity structure images to test the hypothesis that ruptures
on bimaterial faults have statistically preferred propagation directions. The analysis employs
seismic catalogues for 25 fault zones in CA. We distinguish between clustered and homoge-
neous parts of each catalogue, using a recently introduced earthquake cluster analysis, and
examine asymmetry of offspring with respect to parent events within the clustered portion of
each catalogue. The results indicate strong asymmetric patterns along large faults with promi-
nent bimaterial interfaces (e.g. sections of the San Andreas Fault), with enhanced activities in
the directions predicted for the local velocity contrasts, and absence of significant asymmetry
along most other faults. Assuming the observed asymmetric properties of seismicity reflect
the properties of the parent earthquake ruptures, the discussed methodology and results can be
used to develop refined estimates of seismic shaking hazard associated with individual fault
zones.
date: 2011-06
date_type: published
publication: Geophysical Journal International
volume: 185
number: 3
publisher: Oxford University Press
pagerange: 1288-1304
id_number: doi:10.1111/j.1365-246X.2011.04995.x
refereed: TRUE
issn: 0956-540X
official_url: http://dx.doi.org/10.1111/j.1365-246X.2011.04995.x
access_IS-EPOS: unlimited
owner: Publisher
citation:   Zaliapin, Ilya and Ben-Zion, Yehuda  (2011) Asymmetric distribution of aftershocks on large faults in California.  Geophysical Journal International, 185 (3).  pp. 1288-1304. DOI: https://doi.org/10.1111/j.1365-246X.2011.04995.x <https://doi.org/10.1111/j.1365-246X.2011.04995.x>