摘要
江西寻乌地震前在闽粤赣地区观测到一批水化学异常前兆,有水氡、Ca、Cl、Li离子和SiO_2等水质成分及电导率,资料比较丰富。表现特点以短期异常为主,临震异常不很突出;具有多井点多测项异常,在一些点还有同井几个测项出现异常;异常时间相对比较集中,出现时间还有向震中迁移(收缩或逼近)的现象。同时讨论了这批异常主要反映了寻乌震群活动而不是其它地震。
A great number of hydrochemical anomalous precusors in Fujian-Guangdong-Jiangxi region, such as water-quality contents (Rn, Ca, Cl, Li and SiO2 etc.) and water conductivity, were observed before the Xunwu earthquake, Jiangxi province. The data obtained are comparatively abundant. These precusors are predominated by the short-term anomalies, the impending ones are not pronomint. The features for precusor occurrence are that anomalies of multiple measured terms synchronously occurred in multiple wells, even several-term anomalies occurred in same well in some localities, the anomaly-occurred time was relatively concentrated and showed a tendency to migrate toward the epicenter. It is concluded that these anomalies mainly reflect the Xunwu earthquake-swarm activity rather than other seismic activity.
出处
《地震》
CSCD
北大核心
1992年第3期11-17,29,共8页
Earthquake
