The large-scale distribution of great shallow intraplate earthquakes in mainland China and adjacent areas and seismic coupling along plate margins |
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Affiliation: | 1. Earthquake Administration of Sichuan Province, Chengdu, 61004 Sichuan, China;2. Institute of Earthquake Science, China Earthquake Administration, Beijing 100036, China;3. State Key Laboratory of Earthquake Dynamics Institute of Geology, China Earthquake Administration, Beijing 100029, China;1. State Key Laboratory of Petroleum Resource and Prospecting, China University of Petroleum, Beijing 102249, China;2. Institute of Petroleum Exploration and Exploitation, SINOPEC, Beijing 100083, China;3. Basin and Reservoir Research Center, China University of Petroleum, Beijing 102249, China;4. Institute of Energy, China University of Geosciences, Beijing 100083, China;5. Tarim Oilfield Company, CNPC, Korla, Xinjiang 840000, China;1. Department of Geosciences, National Taiwan University, No. 1, Sec. 4th, Roosevelt Rd., Taipei 10617, Taiwan;2. Department of Earth Sciences and Institute of Geophysics, National Central University, Jhongli 320, Taiwan;3. Institute of Earth Sciences, Academia Sinica, Nankang, Taipei 115, Taiwan;4. Central Weather Bureau, Taipei 100, Taiwan;1. State Key Laboratory of Geohazards Prevention and Geoenvironment Protection, Chengdu University of Technology, Chengdu, China;2. Institute for Research on Earth Evolution, Independent Administrative Institution, Japan Agency for Marine-Earth Science and Technology, Yokohama, Japan;3. Institute of Tibetan Plateau Research, Chinese Academy of Sciences, Beijing, China |
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Abstract: | In mainland China and its surroundings the large-scale distribution of great, shallow, intraplate earthquakes shows that there are four main areas of high intraplate seismicity which are (a) the Northern China Seismic Area in east China (30°–42°N); (b) the Southeast-coast Seismic Area in eastern China (19°–25°N); (c) the North-south trending Seismic Area in western China and its surroundings (Burma–China–Mongolia); (d) the Central Asian Seismic Area in west China and its surroundings (Pamirs–Tianshan Mts–Baikal). These four intraplate seismic areas are approximately perpendicular to those sections of the Eurasian plate boundary where the Eurasian plate has a strong seismic coupling with the North American–Pacific Ocean–Philippine Sea plates, and with the Indian plate. The large-scale uneven distribution of intraplate seismicity in China and its surroundings may be controlled by heterogeneity in the stress state on different sections of the plate boundary. |
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