| 摘要: |
| 辽宁省盖州地区自2012 年2 月2 日开始发生了多次4 级地震的震群活动。震群位于北东向的金州断裂北端和北东向海城-营口断裂南端，震群序列整体上呈北西向，即盖州震群并不是发生在北东向的金州断裂北端，很可能发生在金州断裂和海城-营口断裂之间的北西西向构造上。为考察此问题，利用2012 年以来辽宁台网盖州地区的地震观测报告，采用双差定位的方法，给出这个地区的小震精定位结果，结果显示盖州震群的确沿北西向分布，且有随时间向北西向展布的态势。且震源深度逐渐变浅。分析认为盖州震群是发生在金州断裂和海城-营口断裂之间的北西向断层上。 |
| 关键词: 双差定位 盖州震群 北西向断层 |
| DOI： |
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| 基金项目:地震科技星火项目“辽宁至辽吉蒙交界地区速度结构与震源位置联合反演研究”(XH15013Y)资助 |
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| Accurate relocation of earthquake swarm in Gaizhou，Liaoning，China |
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Wang Liang1，2) Huang Jinshui1) Jiao Mingruo2) Cao Fengjuan2) Li Tongxia2) Liang Yijing2)
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1) School of Earth and Space Science，University of Science and Technology of China，Hefei 230026，China;2) Earthquake Administration of Liaoning Province，Shenyang 110034，China
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| Abstract: |
| There was a ML4． 0 earthquake swarm since February 2，2012 in the Gaizhou area． The Gaizhou ML4． 0 earthquake swarm was located on the northern Jinzhou fault and the southern part of Haicheng-Yingkou fault． The overall earthquake distribution was in the northwest direction． We used the earthquake observation reports recorded by the Liaoning seismic stations during the period February 2012 ～ September 2013，and with the double difference location method，obtained the earthquake location of Gaizhou earthquake swarm． The result of earthquake location showed the earthquake swarm distributed along the NW-trending，indeed． As the earthquake swarm developed，the depth of earthquakes became shallower． Analysis showed the Gaizhou earthquake swarm occurred in a new NW-trending faults between on the Jinzhou fault and Haicheng-Yingkou fault． |
| Key words: The double difference location The Gaizhou earthquake swarm Northwest fault |
