摘要
Earthquakes of M_S5. 6 and M_S6.1 occurred in Yingjiang,Yunnan on May 24 and May 30,2014 respectively. In this paper,we use the waveform data recorded by mobile seismic stations( KAC) which were set up in the source area after the Yingjiang MS5. 6earthquake on May 24,2014 to study the shear-wave splitting characteristics of Yingjiang M_S6.1 earthquake sequence with the SAM method. The result shows that predominant polarization of fast shear-waves before the M_S6.1 earthquake is consistent with the direction of regional principal compressive stress,and predominant polarization of fast shear-waves before the M_S6.1 earthquake show better consistency and smaller dispersion compared to after the M_S6.1 earthquake,and there may be a deflection for the fast shearwaves predominant polarization between the M_S6.1 earthquake sequence and foreshock sequence. We found that the time-delays generally exhibited a lower level before the M_S6.1earthquake and a relatively higher value after the M_S6.1 earthquake.
Earthquakes of Ms5.6 and Ms6. 1 occurred in Yingjiang, Yunnan on May 24 and May 30, 2014 respectively. In this paper, we use the waveform data recorded by mobile seismic stations （KAC） which were set up in the source area after the Yingjiang Ms5. 6 earthquake on May 24, 2014 to study the shear-wave splitting characteristics of Yingjiang Ms6. 1 earthquake sequence with the SAM method. The result shows that predominant polarization of fast shear-waves before the Ms6. 1 earthquake is consistent with the direction of regional principal compressive stress, and predominant polarization of fast shear-waves before the Ms6. 1 earthquake show better consistency and smaller dispersion compared to after the Ms6. 1 earthquake, and there may be a deflection for the fast shear- waves predominant polarization between the Ms6. 1 earthquake sequence and foreshock sequence. We found that the time-delays generally exhibited a lower level before the Ms6. 1 earthquake and a relatively higher value after the Ms6. 1 earthquake.
基金
jointly supported by Task Contract for Earthquake Situation Tracking of CEA in 2015(2015010113,2015010301)
fundation from Earthquake Administration of Xinjiang Uygur Autonomous Region,China(201401)
