摘要
采用滇西实验场流动地磁总强度差值的测量资料,应用地磁差值年变率、年同期处理计算方法,着重分析研究了滇西实验场及其附近发生的1996年2月3日～7日丽江地震（震群）、1995年7月10日～12日孟连中缅交界地震、2001年4月10日及6月8日施甸地震和2001年10月27日永胜-宾川地震有关流磁差值年变率及年同期差值的异常变化特征。结果表明,在上述地震前,滇西实验场流磁差值年变率及年同期差存在明显的异常变化。该异常变化特征为:先从震中区的外围开始出现异常点,形成一定范围的异常区域,然后逐步向震中区发展,地震发生在异常区内或外围边缘地区。这些结果对滇西实验场Ms≥5.0地震的短期预测具有重要意义。
The features of anomaly changes in the annual rate and annual difference of reduction value of total field in the moving geomagnetic survey, associated with the earthquakes occurring in the Dianxi Test Field and its neighborhood, which were the following: Lijing (Feb. 3. 1996), Menglian (July 10, 1995 in the border area between China and Bureau), Shidian (Apr. 10. 2001 and June 8. 2001) and Yongshen-Binchuan (Oct. 27. 2001), have been analyzed and studied. The features shows that the anomalous changes appeared earlier in the observational points locating in the area a little far away from the future epicenters than in those points in the epicenter area. The results have an important meaning for the short-term prediction of earthquakes with magnitude higher than 5 in the experimental site of the western Yunnan area.
出处
《地震地磁观测与研究》
2002年第4期38-45,共8页
Seismological and Geomagnetic Observation and Research
关键词
地磁总强度
流动地磁差值
年变率
年同期差
地震
滇西实验场
reduction value of moving geomagnetic survey, annual rate, annual difference, earthquake, the experimental site of the western Yunnan area
