Documents Li Junhui 1 、 3 Li Qi 2 Yang Dongmei 2 1 Seismological Bureau of Anhui, Hefei, China.

Principal component analysis of geomagnetic data associated with Panzhihua Ms 6.1 earthquake - the preparatory result Li Junhui1、3 Li Qi2 Yang Dongmei2 1 Seismological…