jgg     2020 40 (1):  87-93    ISSN: 0412-1961  CN: 21-1139/TG The Anomaly Feature Extraction of Mobile Gravity in the Sichuan-Yunnan Region Using Wavelet Transform Method ——The Case Study of the Ludian MS6.5 and Jinggu MS6.6 Earthquakes in 2014 Received: null  Revised: null  Online: null Supporting info