摘要
根据广东省地震目录,选用6种对粤西地区有较好预报能力的测震学指标进行时间扫描分析和空间扫描分析,并对该区域地震分布与断裂位置、磁异常分布进行对比分析。结果显示:算法复杂性AC值、地震调制比Rm值存在异常,空间扫描结果显示异常多数集中在阳江和北部湾地区,并根据ML≥5.0地震M-T关系和能量蠕变曲线,推测粤西地区2015年有发生ML5.0级地震的可能;地壳磁异常的展布方向与断裂方向一致,ML2.0级以上的地震多集中在弱磁及正负磁异常分界的区域。
6 seismometry indexes are selected based on earthquake directory of Guangdong Province as scanning factors, space-time distribution of earthquake, relation among earthquake and fault and magnetic anomaly in west Guangdong are scanned. The results indicate most of the anomalies are in Yangjiang and Beibu Gulf. And it is predicted that an earthquake with ML5.0 might take place in west Guangdong in 2015. Distribution of crust magnetic anomalies coincides with fault trending. Earthquakes with ML more than 5.0 are distributed over weak magnetic anomaly area and near boundary between positive and negative anomalies.
出处
《四川地质学报》
2018年第3期380-383,共4页
Acta Geologica Sichuan
基金
广州工商学院2017年院级质量工程项目<基于新工科专业背景小创新创业教育的深度融合>(编号:ZL20171102)
关键词
地震
地震调制比Rm值
地壳磁异常
粤西
earthquake
seismic modulation ratio
crust magnetic anomaly
west Guangdong
