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地震 ›› 2006, Vol. 26 ›› Issue (3): 71-78.

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岫岩MS5.4地震前烟台形变异常特征及机理分析

李杰1, 李希亮1, 刘瑞峰1, 范军2, 赵小贺3   

  1. 1.山东省地震局, 山东 济南 250014;
    2.山东省潍坊地震局, 山东 潍坊 261041;
    3.山东省临沂地震局, 山东 临沂 276001
  • 收稿日期:2006-01-06 修回日期:2006-03-15 发布日期:2021-11-01
  • 作者简介:李杰(1963-), 女, 黑龙江密山人, 副研究员, 主要从事地形变资料汇集及地震分析预报等研究。
  • 基金资助:
    中国地震局联合基金项目(106085); 中国地震局2006~2020年地震重点监测防御区确定项目; 2005年山东省地震局合同制项目

Study on the characteristics and mechanism of deformation anomaly in Yantai region before Xiuyan earthquake with MS5.4

LI Jie1, LI Xi-liang1, LIU Rui-feng1, FAN Jun2, ZHAO Xiao-He3   

  1. 1. Earthquake Administration of Shandong Province, Jinan 250014;
    2. Earthquake Administration of Weifang City, Weifang 261041;
    3. Earthquake Administration of Linyi City, Linyi 276001, China
  • Received:2006-01-06 Revised:2006-03-15 Published:2021-11-01

摘要: 运用直接调和分析和速率合成方法对岫岩地震前后烟台形变观测资料进行了处理分析。 结果表明, 岫岩5.4级地震前, 烟台地区形变观测资料出现了短临前兆异常, 此次异常很可能是岫岩发震断层活动引起了相关的蓬莱-威海断裂活动, 最终导致区域应力场增强的结果。

关键词: 岫岩地震, 形变异常, 发震断层, 烟台地区

Abstract: By using the methods of direct harmonic analysis and velocity synthesis, the deformation data observed at Yantai monitoring station before and after the MS5.4 Xiuyan earthquake were analyzed. The results show that short-term deformation anomaly emerged before the event. The anomaly probably is the result of regional stress field enhancement caused by the motion of Weihai-penglai fault triggered by Xiuyan seismogenic fault.

Key words: Xiuyan earthquake, Deformation anomaly, Seismogenic fault, Yantai area

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