Seismicity of northeast India and surroundings : Development over the past 100 years
Seismicity of northeast India and surroundings : Development over the past 100 years
复制标题
印度东北部及周边地区的地震活动：过去100年的发展
DOI：
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发表时间：
1998
期刊：
影响因子：
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通讯作者：
J. Kayal
中科院分区：
文献类型：
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作者：
J. Kayal
印度东北部位于北喜马拉雅弧和东缅甸弧的交界处，是世界上最活跃的地区之一。近百年来，该地区共发生了18次7级以上大地震，其中2次8级以上大地震。1897年的西隆大地震是该国第一次有仪器记录的地震。自1964年以来，随着世界地震台网的建立和局域网的增加，震中定位质量有了很大的提高。近年来，自80年代初以来，几个临时微震台网沿着在该地区的选定地区进行地震前兆调查。区域地震资料（ISC和USGS）、短临小震（MEQ）台网资料和有感/大震的地球物理前兆，使我们对该地区地震的孕育过程有了一定的认识。喜马拉雅主地震带的地震活动被认为是印度板块与欧亚板块碰撞构造的产物，地震活动一般与已知的区域逆冲断层--主边界逆冲断层（MBT）和主中央逆冲断层（MCT）有关。
Northeast India is lying at the juncture of Himalayan Arc to the north and Burmese Arc to the east, and is one of the most active regions of the world. 18 large earthquakes (M >7.0) including two great earthquakes (M > 8.0) occurred in this region during the last 100 years. The 1897 great Shillong earthquake is the first instrumentally recorded earthquake in the country. Since 1964, with the inception of the WWSSN and increase of local networks, location quality of the epicentres are much improved. In the recent years, since early 1980s, several temporary microearthquake networks are run along with earthquake precursor investigations in selected areas of the region. Regional earthquake data (ISC and USGS), temporary close-spaced microearthquake (MEQ) network data and geophysical precursors of the felt/large earthquakes have given us some understanding of generating processes of the earthquakes in this region. The seismicity in the main Himalayan seismic belt believed to be due to the collision tectonics between the Indian Plate of Eurasian Plate, and the earthquakes are generally correlated with the known regional thrusts, the Main Boundary Thrust (MBT) and Main Central Thrust (MCT).