华南地区电离层扰动与河源地震关系的研究  

Study of the Perturbations of Ionosphere over South China Associated with Heyuan Earthquakes

作　　者：徐杰 邓柏昌[2] 杨晶晶[2] 黄江[3] 

机构地区：[1]广东省生态气象中心,广州510640 [2]华南理工大学物理与光电学院,广州510640 [3]广州气象卫星地面站,广州510640

出　　处：《华南地震》2017年第1期1-7,共7页South China Journal of Seismology

基　　金：广东省科技厅计划项目"GPS在广东地区现今构造变形分析和地震预测的应用研究"(2013B020200010)资助

摘　　要：利用华南地区十个GPS-TEC监测站的TEC数据,其中四个监测站位于Dobrovolsky公式计算的河源地震孕育区域内,研究华南低纬度电离层TEC扰动与河源两次中等强度地震的相关性。对电离层TEC时间序列的分析结果显示:河源两次地震前15天内TEC出现了扰动,扰动包括负异常和正异常,表明中等强度的地震,也可能触发一定的电离层扰动。此外,十个站监测到的TEC扰动小于地震孕育区内的四个站监测到的TEC扰动,表明Dobrovolsky公式可以有效地评估地震孕育区的范围。This paper investigated the TEC （total electron content） perturbations of low-latitude ionosphere over South China possibly associated with two moderate Heyuan earthquakes, using data monitored from ten stations located in South China and from four stations in preparation zone of Heyuan earthquake. The analysis of time series of TEC showed that TEC perturbations including negative anomalies as well as positive anomalies occurred 15 days before two Heyuan earthquakes, indicating moderate magnitude earthquakes with less destructibility being able to trigger pronounced perturbations in the ionosphere. The TEC perturbations of the ionosphere monitored from ten GPS receiver stations were lower than that from four GPS receiver stations within the preparation zone of earthquake, indicating the validity of the Dobrovolsky＇s formula for estimating dimensions of the earthquake preparation zone.

关 键 词：电子总含量(TEC) Dobrovolsky公式 ExB漂移 地震电离层扰动 

分 类 号：P315.7[天文地球—地震学]