摘要
运用双差定位法对2022年3月17日新疆皮山M_(S)5.2地震及254个余震序列重新定位,结果显示:(1)皮山M_(S)5.2地震重定位结果为36.025°N,77.839°E,震源深度为17 km。(2)皮山地震的破裂沿断层向WS向迁移,破裂区能量释放较为充分,序列主要呈NE或SW向分布。(3)皮山M_(S)5.2地震主震发生在天神达坂断裂的北侧,其余震大多数分布在主震南侧。由定位结果判断发震构造是近NE-SW向的隐伏断层,断层破裂不均匀且深部破裂尺度较小。
Double difference positioning method is used to reposition Pishan M_(S)5.2 earthquake on March 17,2022 and its 254 aftershock sequences.The results show that:(1)The location results of Pishan M_(S)5.2 earthquake are 36.025°N,77.839°E,and the focal depth is 17 km.(2)The rupture of Pishan earthquake migrated along the fault to SW direction,and the energy in the rupture area was fully released,and the sequence mainly showed NE or SW direction distribution.(3)The main earthquake of Pishan M_(S)5.2 earthquake occurred on the north side of Tianshen Daban fault,and most of the other earthquakes were distributed on the south side of the main earthquake.According to the location results,it is judged that the seismogenic structure is a hidden fault with nearly NE-SW direction,with uneven fault rupture and small deep fracture scale.
作者
金花
张鹏程
周斌
JIN Hua;ZHANG Peng-cheng;ZHOU Bin(Earthquake Agency of Xinjiang Uygur Autonomous Region,Urumqi 830011,Xinjiang,China)
出处
《内陆地震》
2023年第2期121-127,共7页
Inland Earthquake
基金
新疆地震科学基金(202303).
关键词
皮山地震
双差定位
余震序列
Pishan earthquake
Double difference positioning
Aftershock sequence
