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利用中国数字地震台网和IncorporatedResearchInstitutionsforSeismology (IRIS)提供的远场宽频带P波垂向记录,基于有限地震断层方法,反演了2 0 0 3年2月2 4日新疆伽师6 5级地震震源破裂过程.结果表明,本次地震为北倾低角度稍具左移分量的逆冲破裂事件,断层面走向30 0°,倾角2 8°,震源深度7 5km .其震源机制与1997～1998年伽师强震群有明显区别,而与1996年阿图什地震相似.推断该地震是由塔里木盆地向北挤压,在天山造山带引发逆冲断层活动造成的.
Using the far-field broad-band P-wave vertical records provided by China Digital Seismograph Network and Incorporated Research Institutions for Information (IRIS), based on the finite seismic fault method, the source of the June 25, 1996 Jiashi The results show that this earthquake is a thrust fracture event with a slight left-shift component at the north-dip angle with a strike of 30 °, a dip angle of 28 ° and a focal depth of 75 km.The focal mechanism is similar to that of 1997 ~ 1998 The Jiashi strong earthquake swarm is obviously different from the Atushi earthquake in 1996. It is inferred that the earthquake was caused by the northward compression of the Tarim Basin and the initiation of thrust activities in the Tianshan orogenic belt.