| 2013年11月23日莱州4.6级地震序列初步研究 |
| |
| 引用本文： | 赵金花,郑建常,王鹏,徐长朋,李冬梅.2013年11月23日莱州4.6级地震序列初步研究[J].防灾减灾学报,2014(3):25-29. |
| |
| 作者姓名： | 赵金花 郑建常 王鹏 徐长朋 李冬梅 |
| |
| 作者单位： | 山东省地震局,山东 济南,250014 |
| |
| 基金项目： | 山东省地震局合同制项目 |
| |
| 摘 要： | 介绍了2013年11月23日山东省莱州市4.6级地震的序列类型、震源机制解、波形特征、双差精定位等情况。该次地震属于典型的前震-主震-余震型，序列主震及其前震和余震的波形近台垂直向初动方向一致，最高波形相似度达到0.7；使用双差方法对序列进行精定位，结果显示ML≥2.0级以上地震大致呈北东向分布；序列发生在NE走向的柞村断裂与莱州断裂附近，主震震源机制解显示为右旋走滑型，节面走向NE，与宏观考察烈度走向一致；平均波速比计算结果显示，主震发生前该地区的介质密度可能存在一定变化。
|
| 关 键 词： | 序列类型 双差定位 波速比 震源机制 初动符号 |
PRELIMINARy STUDy OF M4.6 EARTHQUAKE SEQUENCE IN LAIZHOU ON NOVEMBER 23,2013 |
| |
| ZHAO Jin-hua,ZHENg Jian-chang,WANg Peng,xU Chang-peng,LI Dong-mei.PRELIMINARy STUDy OF M4.6 EARTHQUAKE SEQUENCE IN LAIZHOU ON NOVEMBER 23,2013[J].Seismological Research of Northeast China,2014(3):25-29. |
| |
| Authors: | ZHAO Jin-hua ZHENg Jian-chang WANg Peng xU Chang-peng LI Dong-mei |
| |
| Institution: | ( Earthquake Administration of Shandong Province, Shandong Jinan 250014, China ) |
| |
| Abstract: | The sequence type, focal mechanism solutions, waveform characteristics, the double-difference fine positioning and so on of M4.6 earthquake in Laizhou city on November 23,2013 are introduced in this paper. It is a typical foreshock-mainshock-aftershock type. The first motion direction of the mainshock and foreshock sequence is same with the perpendicular direction of the wave near the station. And the maximum waveform similarity coefficient is 0.7. By using the double-difference method for fine positioning sequence, the above results show that ML≥2.0 earthquakes roughly distributed in NE direction. The sequences occurred in the middle of the NE-trending Zuo village fault and Laizhou fault, in which the fracture mechanism solutions of the mainshock source appears as dextral strike-slip type, nodal plane toward NE, and macro inspection intensity toward consensus. The average velocity ratio calculations show that there may be some changes in the density of the medium in the region before the main shock occurred. |
| |
| Keywords: | sequence type double difference location wave velocity ratio focal mechanism first motion |
| 本文献已被 维普 万方数据 等数据库收录！ |
|
