jgg     2013 33 (增2):  51-54    ISSN: 0412-1961  CN: 21-1139/TG COMPARISON AMONG METHODS  OF DIFFERENT  PEAK ACCELERATION Key Laboratory of Geodesy, Institute of Earthquake, CEA, Wuhan 430071 Received: 2013-06-20  Revised: null  Online: 2013-10-24 Supporting info