摘要
通过研究大连台地磁秒采样数据,发现在汶川M8.0和日本M8.6级地震中出现了同震响应,这一发现在辽宁地区地磁分钟值采样的朝阳、铁岭、营口台并未出现。经过同步对比等方法分析,得出响应延迟时间、响应幅度等特征与地震震中距有一定对应关系,并初步探讨了产生这种现象原因。
Many coseismic effects of strong earthquake on fluid and deformation were observed in Liaoning province which have never observed on electromagnetism until the the M8.0 earthquake of Wenchuan and the M8.6 earthquake of Japan. In this research, we analyzed the second sampled data of Dalian seismic station and the results showed that： The second sampled data of the existing digital geomagnetic observation recorded the coseismic effects in Liaoning, while the minute sampled data of Chaoyang, Tieling, Yingkou seismic station recorded nothing. Meanwhile we gave the relations between characteristic of earthquake surface wave response delay time, response range, conseismic signal duration and distance of epicenter, earthquake magnitude, and then we discussed the physical significance of the coseismic effect of electromagnetism.
出处
《防灾减灾学报》
2016年第2期28-31,共4页
Journal of Disaster Prevention And Reduction
基金
地震科技星火计划项目(项目编号:XH15012)
关键词
强震
地磁秒数据
响应特征
strong earthquake
geomagnetic second sampled data
coseismic effect
