【摘要】 2016年1月21日青海门源M_S 6.4地震是甘青地区自2013年7月22日甘肃岷县漳县6.6级地震后发生的最大震级地震,其震中距宁夏边界230 km。通过梳理震前宁夏地区地震活动异常和地球物理观测资料异常发现,震前存在测震学异常2项;地球物理观测资料异常6项,其中,形变异常4项,地下流体异常2项。5项异常为中长期异常,2项测震学异常和甘盐池井水温异常为短期异常,无临震异常出现。更多还原

【Abstract】 The Menyuan M_S 6.4 earthquake on January 21,2016,is the largest earthquake in the Gansu Qinghai region since the Minxian-Zhangxian M_S 6.6 earthquake on July 22,2013.,It is located 230 km away from the Ningxia border.Through sorting out the anomalies of seismicity and geophysical observation data in Ningxia before the earthquake,it is found that there are 2 seismicity anomalies and 6 geophysical observation data anomalies before the earthquake,including 4 deformation anomalies and 2 underground fluid anomalies.Most of these anomalies are medium and long-term anomalies.Seismicity anomalies and water temperature anomalies in ganyanchi well are short-term anomalies,and there is no imminent earthquake anomaly.更多还原