jgg     2010 30 (Supp.2):  1-5    ISSN: 0412-1961  CN: 21-1139/TG HOW TO IDENTIFY EARTHQUAKE PRECURSOR? Qiu Zehua Institute of Crustal Dynamics, CEA, Beijing 100085 Received: 1900-01-01  Revised: 1900-01-01  Online: null Supporting info null