节点文献
首都圈及其邻近地区电磁辐射映震效果研究
Study on seismic precursor feature of electromagnetic radiation in the capital circle and its surrounding area
【摘要】 首都圈及其附近地区多年观测的电磁辐射资料表明,地震电磁辐射异常与 300 km范围内5级以上地震,200 km范围内 4.5~4.9级地震和100 km范围内 4.0~4.4级地震具有比较明显的对应关系。其变化规律和映震特点是震中距愈小,地震愈大,信息持续时间愈长,异常幅度也愈大;异常面积(即异常台站数)与地震大小成正相关。统计表明,中等以上地震与异常信息对应率约76%。
【Abstract】 The electromagnetic radiation data observed for many years in the Capital cir- cle and its surrounding area demonstrates that electromagnetic radiation anomalies are rel- ative significantly with the earthquakes M ≥ 5 within a rang of 300 km, the earthquake M = 4. 5 ~4. 9 within 200 km and the earthquakes M = 4. 0~4. 4 within 100 km. The seismic precursor feature is that the larger the earthquakes, the shorter the epicentral dis- tance; the longer the duration, and the greater the amplitude of the anomalies, as well as the anomalous area, i. e. the number of the stations with anomalies, is positive propor- tional to the earthquake magnitudes. The statistical result shows that the correspondence ratio of moderately strong earthquakes or stronger events reaches 76%.
【Key words】 Capital circle; Electromagnetic radiation; Seismic precursor feature;
- 【文献出处】 地震 ,EARTHQUAKE , 编辑部邮箱 ,2000年01期
- 【分类号】P315.721
- 【被引频次】23
- 【下载频次】50