【摘要】 2013年9月4日福建仙游(25.6°N,118.8°E)发生MS4.8地震,福建水化学台网震前有多项前兆数据出现异常变化,异常测项随着临震而增加,异常集中出现在6—9月;水化学异常大多表现为中期异常,其次为短期、短临异常。其中,氟离子高值异常显著,异常井多,时间长;在时间进程上,有些前兆异常具有明显的层次性和阶段性;在异常形态上,多井异常形态变化显示一致性和不一致性,个体与群体异常形态变化显示差异性。更多还原

【Abstract】 On Sep.4, 2013, an earthquake with MS4.8 occurred in Xianyou,Fujian Province. The anomalous changes had been observed in Fujian hydrochemical monitoring network before the earthquake. The monitoring items of the anomalies increased gradually at the approach of the earthquake and mainly occurred from June to September. The majority hydrochemical anomalous changes are the mid-term and next are short-term and imminent earthquake anomalies. The fl uorine ion anomalies of higher data are remarkable, and the wells are at most and the time is the longer. Some hydrochemical anomalous changed by administrative and by stages in the course of time, and some changed unanimously and not-unanimously, and some differed greatly with individuality to population in the anomalous formation.更多还原