| 玉门、民乐等地震前跨断层形变异常及与定点前兆观测的相互印证 |
| |
| 引用本文： | 李瑞莎,张希,唐红涛,贾鹏.玉门、民乐等地震前跨断层形变异常及与定点前兆观测的相互印证[J].西北地震学报,2012,34(4):388-392. |
| |
| 作者姓名： | 李瑞莎 张希 唐红涛 贾鹏 |
| |
| 作者单位： | 中国地震局第二监测中心,陕西西安,710054 |
| |
| 基金项目： | 中国地震局星火计划项目，2011年度震情跟踪青年课题 |
| |
| 摘 要： | 2002年甘肃玉门5.9级、2003年民乐6.1、5.8级及岷县5.2级地震前震区周围十几至二、三百公里范围内观测到一定数量、明显的跨断层短水准形变异常,其异常形态以加速、突跳或尖点突跳为主,具中期背景或短期前兆意义,反映震前断裂出现先逆断增强后松弛的变化过程,在转折松弛时段易发生地震.其异常空间分布、出现时间等与定点前兆异常具有较好的相互印证意义.
|
| 关 键 词： | 跨断层形变 定点前兆异常 短水准流动形变观测 玉门5.9级地震 民乐6.1和5.8级地震 |
Cross-Fault Deformation Anomaly and Confirm Each Other with the Fixed-point Precursors Observation before Yumen and Minle Earthquakes |
| |
| LI?Rui-sh,ZHANG?Xi,THANG?Hong-tao and JIA?Peng.Cross-Fault Deformation Anomaly and Confirm Each Other with the Fixed-point Precursors Observation before Yumen and Minle Earthquakes[J].Northwestern Seismological Journal,2012,34(4):388-392. |
| |
| Authors: | LI?Rui-sh ZHANG?Xi THANG?Hong-tao and JIA?Peng |
| |
| Institution: | The?Second?Monitoring?and?Application?Center,CEA;;The?Second?Monitoring?and?Application?Center,CEA;;The?Second?Monitoring?and?Application?Center,CEA;;The?Second?Monitoring?and?Application?Center,CEA; |
| |
| Abstract: | A certain number and significant across-fault short leveling deformation anomaly were observed in the source region around a dozen hundred km range before Yumen MS5.9 earthquake in 2002,Minle MS6.1 and MS5.8 earthquakes in 2003 and Minxian MS5.2 earthquake in 2003.The main abnormal morphology were acceleration,sudden jump or sharp point sudden jump,with mid-term background or short-term precursors significant.Anomalies reflect that the fault first enhanced inverse then changed to relaxation,earthquakes usually happened when the fault change relaxation.The spatial distribution and occurrence time of anomaly have added and confirmed significance to precursor anomalies of fixed-points. |
| |
| Keywords: | Cross-fault deformation Precursor anomaly of fixed-point Short leveling mobile deformation observation Yumen MS5 9 earthquake Minle MS6 1 and MS5 8 earthquake |
| 本文献已被 万方数据 等数据库收录！ |
| 点击此处可从《西北地震学报》浏览原始摘要信息 |
| 点击此处可从《西北地震学报》下载免费的PDF全文 |
