Abstract The variation characteristic of transfer function parameter of geomagnetic data is analyzed which recorded by observatories in the time before and after M4.8 Anqing earthquake in January 19, 2011 and M4.6 RuichangYangxin earthquake in September 10, 2011. The variation of geomagnetic field in the Z component before Anqing M4.8 earthquake in east China is also summarized. The results show that some transfer function parameters of Wuhan observatory, Jingxian observatory and Jinzhai observatory appeared different degrees of abnormalities before and after the two moderately strong earthquakes. The lowpoint time of the geomagnetic vertical component in east China appears anomalous features before the Anqing earthquake. Daily variation of geomagnetic field arises obvious distortion.
Dai Miao,Li Junhui,Liu Jian et al. CHARACTERISTIC ANALYSIS OF GEOMAGNETIC DATA BEFORE AND
AFTER MODERATELY STRONG EARTHQUAKES IN SOUTHWEST
AREA OF ANHUI PROVINCE[J]. jgg, 2013, 33(Supp.1): 143-146.
Dai Miao,Li Junhui,Liu Jian et al. CHARACTERISTIC ANALYSIS OF GEOMAGNETIC DATA BEFORE AND
AFTER MODERATELY STRONG EARTHQUAKES IN SOUTHWEST
AREA OF ANHUI PROVINCE[J]. jgg, 2013, 33(Supp.1): 143-146.
