Abstract：The distances between Shanghai Songjiang seismic sequence in Novemeber,2009 and Sheshan deformation station,Chashan deformation station are about 18 km and 32 km respectively.The deformation observations appeared of different anomaly degree at these two stations before the earthquakes．The results combined the deformation data with focal mechanism solution show that the direction of the anomaly is consistent with the direction of background stress field of this area,so we think that the observed deformation anomalies are likely to reflect the changes in tectonic stress field.
Wang Xiaoping,Yin Jingyuan,Ni Youzhong et al. STUDY ON CHARACTERISTICS AND MECHANISM OF DEFORMATION ANOMALY AT SHANGHAI FIXED DEFORMATION STATIONS[J]. jgg, 2010, 30(Supp.1): 50-52.
