文安和古冶2次MS5.1地震活动特征对比
Comparative Research on Seismic Activity Characteristics of Wen'an MS5.1 Earthquake and Guye MS5.1 earthquake
宋程 1张永仙 2夏彩韵 3孙路强1
作者信息
- 1. 天津市地震局,天津 300201
- 2. 中国地震局地震预测研究所,北京 100036
- 3. 辽宁省地震局,沈阳 110031
- 折叠
摘要
对 2006 年文安MS5.1 地震和 2020 年古冶MS5.1 地震前的异常平静图像、区域-时间-长度(RTL)曲线、地震图像信息(PI)热点进行了对比分析.研究结果表明:① 2 次MS5.1 地震前存在不同程度的时空平静异常图像;② RTL方法显示,文安地震前半年存在显著平静异常,古冶地震前半年内未出现平静异常;③ PI方法显示,在3 年预测窗长和 0.1°×0.1°网格尺度下,2 次地震的震中附近皆存在热点,文安地震的有效热点相比于古冶地震对地点指示意义更好,发震风险性更高.该研究对华北地区MS5.0 以上地震活动特征总结和地震危险性评估具有一定的参考意义.
Abstract
The 2006 Wen'an MS5.1 earthquake and the 2020 Guye MS5.1 earthquake were comparatively analyzed by using the abnormal seismic quiescence image,the region-time-length curve method and the hotspots of pattern information method.The results show that:(1)there are different spatio-temporal quiescence patterns before the two MS5.1 earthquakes.(2)the RTL method shows that there is significant seismic quiescence abnormality 6 months before Wen'an earthquake,and not appeared 6 months before Guye earthquake.(3)the PI method shows that under the 3a forecasting window length and 0.1°×0.1° grid size,hotspots were found near the epicenter of both earthquakes.Compared with the Guye earthquake,the effective hotspots of the Wen'an earthquake has indicative significance for epicenter location,and the seismic risk is higher.The above research has certain reference significance for summarizing the seismic activity characteristic and risk assessment of M≥5.0 earthquakes in North China.
关键词
文安MS5.1地震/古冶MS5.1地震/平静异常/RTL方法/PI方法Key words
Wen'an MS5.1 earthquake/Guye MS5.1 earthquake/quiescence abnormality/RTL method/PI method引用本文复制引用
基金项目
天津市自然科学基金青年项目(22JCQNJC01070)
天津市地震局科研项目(Zd202402)
天津市地震局科研项目(Zd202304)
出版年
2024
NETL
NSTL
万方数据