jgg     2014 34 (2):  45-50    ISSN: 0412-1961  CN: 21-1139/TG NUMERICAL SIMULATION OF REVERSE DISPLACEMENT REGIONS  DURING JOG FAILURE FOR TWO KINDS OF ECHELON FAULTS 1）College of Mechanics and Engineering，Liaoning Technical University，Fuxin 123000 2）Laboratory of Earthquake Dynamics，Institute of Geology，CEA，Beijing 100029 Received: 2013-10-03  Revised: null  Online: 2014-04-21 Supporting info