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[1]LI Danning,GAO Yang,ZHU Huiyu,et al.Research on Double-difference Relocations and Focal Mechanism Solutions of the 2014 Yunnan Jinggu MS6.6 Earthquake Sequence[J].Journal of Seismological Research,2017,40(03):465-473.

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Research on Double-difference Relocations and Focal Mechanism Solutions of the 2014 Yunnan Jinggu M_S6.6 Earthquake Sequence

Journal of Seismological Research[ISSN 1000-0666/CN 53-1062/P] Volume: 40 Number of periods: 2017 03 Page number: 465-473 Column: 自投稿专栏 Public date: 2017-07-23

Title:: Research on Double-difference Relocations and Focal Mechanism Solutions of the 2014 Yunnan Jinggu M_S6.6 Earthquake Sequence

Author(s):: LI Danning¹; GAO Yang¹; ZHU Huiyu²; QIN Min¹; ZHANG Huiyuan¹; XU Yan³; (1.Yunnan Earthquake Agency,Kunming 650224,Yunnan,China)(2.University of Science and Technology of China,Hefei 230026,Anhui,China)(3.School of Resource Environment and Earth Science,Yunnan University,Kunming 650091,Yunnan,China)

Keywords:: Jinggu M_S6.6 earthquake; waveform cross-correlation; double-difference location; focal mechanisms

CLC:: P315.72

DOI:: -

Abstract:: Using the double-difference method that combined with waveform cross-correlation,we relocated the Jinggu M_S6.6 and its 730 aftershocks with magnitude between 2 and 5 and finally obtained 649 relocated earthquakes,the statistical location error are 18 m in EW,19 m in NS and 23 m in depth direction,respectively.The aftershock sequence presents a zonal shape with lengths of 20km and along the west branch of Wuliangshan fault(Puwen fault).But two strong aftershocks sequence distribution direction has some transformation,mainly along the nearly NS with length of 10 km after the strong aftershocks with M_S5.8 and M_S5.9.This may be associated with fracture on the west side of NNE direction of the Lancang river fault and on the east side of NW direction of the west branch of Wuliangshan fault(Puwen fault),also may be related to segmental rupture or segmental activity of fault.Most earthquakes are predominately located between 6 km and 15 km.But the depth of the earthquake sequence has the tendency of a whole deeper distribution range are mainly concentrated in 9 km to 16 km a few days later.This indicates the complexity of the regional geological structure.Using full waveform simulation method to get the focal mechanism solution of M_S≥3.5 earthquakes,the focal mechanism of the north earthquakes is consisted with the main shock.The strike of plane I of the south earthquakes have a trend towards NS.

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Last Update: 2017-07-20