摘要
主要研究2012年6月30日新源、和静6.6级地震前,震中附近的观测台站观测到了丰富的趋势异常和部分中短期异常。分析结果表明,①震前存在9项趋势转折异常,异常比例为40.9%,这些异常时间上具有同步性,这表明,震前背景性异常突出;②震前观测到6项中短期前兆异常,异常比例仅为27.3%,中短期异常主要分布在200～300 km范围内;③石场、精河水平摆、榆树沟水管、阜康伸缩仪和克拉玛依钻孔倾斜记录到的中短期异常,其共同特点是异常幅度大,克拉玛依出现的突变异常具有短临异常性质,部分中短期异常具有重复性。
Medium-short term and trend anomalies were recorded by observation station before earth- quake with Ms6.6 on June 30th,2012. The result shows： （1） about nine trend anomalies are syn- chronism before earthquake, the percentage of anomaly is about 40.9% which indicates background anomaly is outstanding;（2） about six medium-short term anomalies mainly located at range of 200 - 300 km around the epicenter,the percentage of anomaly is about 27.3% ;（2） medium-short term anomalies were recorded in Shichang, Jinghe, Yushugou, Fukang and Karamay station, the common features of these anomalies are with a large amplitude and part of them have repeatability. Abrupt change appeared in Karamay station showed short term anmaly.
出处
《内陆地震》
2012年第4期347-353,共7页
Inland Earthquake
关键词
定点形变观测
新源
和静6.6级地震
前兆
趋势异常
中短期异常
突变异常
Deformation observation
Xinyuan, Hejing earthquake with Ms6.6
Precursor
Trend a- nomaly
Medium-short term anomaly
Abrupt change
