1987年8月2日江西寻乌震群的近场强地面运动观测及其震源特征分析
OBSERVATION OF NEAR FIELD STRONG GROUND MOTION AND SEISMIC SOURCE FEATURE ANALYSIS FOR THE EARTHQUAKE SWARM OF XUNWU, JIANGXI PROVINCE OF AUG. 2, 1987
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摘要: 使用DCS-302数字磁带记录地震仪组成的临时性流动台网,得到一批寻乌震群的中、小地震近场加速度记录.经过筛选对其中23次地震进行了精确定位,求得了综合断层面解,并将它与主震机制作了比较.测定了较大地震的峰值加速度及震源参数;对该震群的震源特征进行了分析.结果表明此次寻乌震群的震源破裂过程主要受北西向断裂的控制.Abstract: Using a mobile small-aperture network consisting of DCS-302 Digital Cassette Tape Recorf-ing Seismgraphs,we obtained a series of the near-field acceleration records of the moderate and small earthquakes of the Xunwu earthquake swarm. Through selection,23 earthquakes among them were accurately located. We worked out the composite fault plane solution and compared it with the fault plane solution of the main shock of the swarm. We also determined the peak-value acceleation and hypocenter parameters of the greater earthquakes as well as analysed the focus feactures of the swarm. The results show that the focus rupture process of the swarm was under the control of a NW fault in southern Jiangxi province.
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