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A Global Search for Triggered Tremor Following the 2011 Mw 9.0 Tohoku Earthquake

2013; Seismological Society of America; Volume: 103; Issue: 2B Linguagem: Inglês

10.1785/0120120171

1943-3573

Kevin Chao, Zhigang Peng, Héctor González‐Huízar, Chastity Aiken, Bogdan Enescu, Honn Kao, A. A. Velasco, Kazushige Obara, Takanori Matsuzawa,

High-pressure geophysics and materials

Research Article| May 01, 2013 A Global Search for Triggered Tremor Following the 2011 Mw 9.0 Tohoku Earthquake Kevin Chao; Kevin Chao School of Earth and Atmospheric Sciences, Georgia Institute of Technology, 311 Ferst Drive, Atlanta, Georgia 30332 *Now at Earthquake Research Institute, University of Tokyo, 1‐1‐1 Yayoi, Bunkyo‐ku, Tokyo 113‐0032, Japan. Search for other works by this author on: GSW Google Scholar Zhigang Peng; Zhigang Peng School of Earth and Atmospheric Sciences, Georgia Institute of Technology, 311 Ferst Drive, Atlanta, Georgia 30332 Search for other works by this author on: GSW Google Scholar Hector Gonzalez‐Huizar; Hector Gonzalez‐Huizar Geological Sciences, University of Texas at El Paso, 500 W. University Ave., El Paso, Texas 79902 Search for other works by this author on: GSW Google Scholar Chastity Aiken; Chastity Aiken School of Earth and Atmospheric Sciences, Georgia Institute of Technology, 311 Ferst Drive, Atlanta, Georgia 30332 Search for other works by this author on: GSW Google Scholar Bogdan Enescu; Bogdan Enescu National Research Institute for Earth Science and Disaster Prevention (NIED), 3‐1 Tennodai, Tsukuba, Ibaraki 305‐0006, Japan †Now at Earth Evolution Sciences Department, University of Tsukuba, 1‐1‐1 Tennodai, Tsukuba, Ibaraki 305‐8572, Japan. Search for other works by this author on: GSW Google Scholar Honn Kao; Honn Kao Geological Survey of Canada, Pacific Geoscience Centre, 9860 West Saanich Road, Sidney, BC V8L 4B2, Canada Search for other works by this author on: GSW Google Scholar Aaron A. Velasco; Aaron A. Velasco Geological Sciences, University of Texas at El Paso, 500 W. University Ave., El Paso, Texas 79902 Search for other works by this author on: GSW Google Scholar Kazushige Obara; Kazushige Obara Earthquake Research Institute, University of Tokyo, 1‐1‐1 Yayoi, Bunkyo‐ku, Tokyo 113‐0032, Japan Search for other works by this author on: GSW Google Scholar Takanori Matsuzawa Takanori Matsuzawa National Research Institute for Earth Science and Disaster Prevention (NIED), 3‐1 Tennodai, Tsukuba, Ibaraki 305‐0006, Japan Search for other works by this author on: GSW Google Scholar Author and Article Information Kevin Chao *Now at Earthquake Research Institute, University of Tokyo, 1‐1‐1 Yayoi, Bunkyo‐ku, Tokyo 113‐0032, Japan. School of Earth and Atmospheric Sciences, Georgia Institute of Technology, 311 Ferst Drive, Atlanta, Georgia 30332 Zhigang Peng School of Earth and Atmospheric Sciences, Georgia Institute of Technology, 311 Ferst Drive, Atlanta, Georgia 30332 Hector Gonzalez‐Huizar Geological Sciences, University of Texas at El Paso, 500 W. University Ave., El Paso, Texas 79902 Chastity Aiken School of Earth and Atmospheric Sciences, Georgia Institute of Technology, 311 Ferst Drive, Atlanta, Georgia 30332 Bogdan Enescu †Now at Earth Evolution Sciences Department, University of Tsukuba, 1‐1‐1 Tennodai, Tsukuba, Ibaraki 305‐8572, Japan. National Research Institute for Earth Science and Disaster Prevention (NIED), 3‐1 Tennodai, Tsukuba, Ibaraki 305‐0006, Japan Honn Kao Geological Survey of Canada, Pacific Geoscience Centre, 9860 West Saanich Road, Sidney, BC V8L 4B2, Canada Aaron A. Velasco Geological Sciences, University of Texas at El Paso, 500 W. University Ave., El Paso, Texas 79902 Kazushige Obara Earthquake Research Institute, University of Tokyo, 1‐1‐1 Yayoi, Bunkyo‐ku, Tokyo 113‐0032, Japan Takanori Matsuzawa National Research Institute for Earth Science and Disaster Prevention (NIED), 3‐1 Tennodai, Tsukuba, Ibaraki 305‐0006, Japan Publisher: Seismological Society of America First Online: 14 Jul 2017 Online ISSN: 1943-3573 Print ISSN: 0037-1106 Bulletin of the Seismological Society of America (2013) 103 (2B): 1551–1571. https://doi.org/10.1785/0120120171 Article history First Online: 14 Jul 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn Email Permissions Search Site Citation Kevin Chao, Zhigang Peng, Hector Gonzalez‐Huizar, Chastity Aiken, Bogdan Enescu, Honn Kao, Aaron A. Velasco, Kazushige Obara, Takanori Matsuzawa; A Global Search for Triggered Tremor Following the 2011 Mw 9.0 Tohoku Earthquake. Bulletin of the Seismological Society of America 2013;; 103 (2B): 1551–1571. doi: https://doi.org/10.1785/0120120171 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietyBulletin of the Seismological Society of America Search Advanced Search Abstract The 2011 Mw 9.0 Tohoku, Japan, earthquake triggered deep tectonic tremor and shallow microearthquakes in numerous places worldwide. Here, we conduct a systematic survey of triggered tremor in regions where ambient or triggered tremor has been previously identified. Tremor was triggered in the following regions: south‐central Alaska, the Aleutian Arc, Shikoku in southwest Japan, the North Island of New Zealand, southern Oregon, the Parkfield–Cholame section of the San Andreas fault in central California, the San Jacinto fault in southern California, Taiwan, and Vancouver Island. We find no evidence of triggered tremor in the Calaveras fault in northern California. One of the most important factors in controlling the triggering potential is the amplitude of the surface waves. Data examined in this study suggest that the threshold amplitude for triggering tremor is ∼0.1 cm/s, which is equivalent to a dynamic stress threshold of ∼10 kilopascals. The incidence angles of the teleseismic surface waves also affect the triggering potentials of Love and Rayleigh waves. The results of this study confirm that both Love and Rayleigh waves contribute to triggering tremor in many regions. In regions where both ambient and triggered tremor are known to occur, tremor triggered by the Tohoku event generally occurred at similar locations with previously identified ambient and/or triggered tremor, further supporting the notion that although the driving forces of triggered and ambient tremor differ, they share similar mechanisms. We find a positive relationship between the amplitudes of the triggering waves and those of the triggered tremor, which is consistent with the prediction of the clock‐advance model.Online Material: Table of measured parameters and other information related to triggering/nontriggering information, and figures of observed seismograms. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.