eprintid: 168 rev_number: 15 eprint_status: archive userid: 2 dir: disk0/00/00/01/68 datestamp: 2015-02-10 12:19:06 lastmod: 2020-03-24 08:24:45 status_changed: 2015-04-27 07:26:52 type: article metadata_visibility: show creators_name: Chen, Po creators_name: Jordan, Thomas H. creators_name: Zhao, Li creators_id: pchen@uwyo.edu creators_id: tjordan@usc.edu creators_id: zhaol@earth.sinica.edu.tw corp_creators: Department of Geology and Geophysics, University of Wyoming, USA corp_creators: Department of Earth Sciences, University of Southern California, USA corp_creators: Institute of Earth Sciences, Academia Sinica, Taiwan title: Resolving fault plane ambiguity for small earthquakes ispublished: pub subjects: SS divisions: EPOS-P full_text_status: none keywords: Earthquake source observations; Seismicity and tectonics; Computational seismology abstract: We have developed an automated procedure to resolve fault-plane ambiguity for small to medium-sized earthquakes (2.5 ≤ M L ≤ 5) using synthetic Green’s tensors computed in a 3-D earth structure model and applied this procedure to 35 earthquakes in the Los Angeles area. For 69 per cent of the events, we resolved fault plane ambiguity of our CMT solutions at 70 per cent or higher probability. For some earthquakes, the fault planes selected by our automated procedure were confirmed by the distributions of relocated aftershock hypocentres. In regions where there are no precisely relocated aftershocks or for earthquakes with few aftershocks, we expect our method to provide the most convenient means for resolving fault plane ambiguity. Our procedure does not rely on detecting directivity effects; therefore it is applicable to any types of earthquakes. date: 2010 publication: Geophysical Journal International volume: 181 number: 1 publisher: Oxford University Press pagerange: 493-501 id_number: doi:10.1111/j.1365-246X.2010.04515.x refereed: TRUE issn: 0956-540X official_url: http://dx.doi.org/10.1111/j.1365-246X.2010.04515.x access_IS-EPOS: unlimited owner: Publisher citation: Chen, Po and Jordan, Thomas H. and Zhao, Li (2010) Resolving fault plane ambiguity for small earthquakes. Geophysical Journal International, 181 (1). pp. 493-501. DOI: https://doi.org/10.1111/j.1365-246X.2010.04515.x