皮山M_S6.5地震前塔什库尔干新60泉水温异常特征分析
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摘要
2015年7月3日新疆皮山县发生M_S6.5地震,震前塔什库尔干新60泉水温出现异常变化,以中短期异常为主,表现为泉水温度的下降—持续—上升的中期异常及临震前的快速阶升阶降变化,震后泉水温度缓慢恢复至背景水平。结合传统的P波初动法计算塔什库尔干台的小震平均震源机制解,对塔什库尔干台附近应力场变化进行分析,为塔什库尔干新60泉异常变化提供应力依据,同时对本次异常变化及机理进行浅析,为今后泉水水温异常判定提供参考。
Pi Shan earthquake with M_S6. 5 occurred on July 3 rd,2015. Taxkorgan new 60 spring water temperature presented abnormal change before the earthquake,and was given priority to short to medium term anomalies,which mainly showed down-last-up anomaly,then backed to background level slowly. Combined with traditional P wave initial motion method to calculate average focal mechanism solution of small earthquakes of Taxkorgan ride,it analyzed the stress field change near Taxkorgan station,provided the basis of stress for Taxkorgan new 60 spring changes. At the same time,anomalies and it's mechanism were analyzed,which provided reference for the springs water temperature anomaly judgement in the future.
Pi Shan earthquake with M_S6. 5 occurred on July 3 rd,2015. Taxkorgan new 60 spring water temperature presented abnormal change before the earthquake,and was given priority to short to medium term anomalies,which mainly showed down-last-up anomaly,then backed to background level slowly. Combined with traditional P wave initial motion method to calculate average focal mechanism solution of small earthquakes of Taxkorgan ride,it analyzed the stress field change near Taxkorgan station,provided the basis of stress for Taxkorgan new 60 spring changes. At the same time,anomalies and it's mechanism were analyzed,which provided reference for the springs water temperature anomaly judgement in the future.
引文
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[3]童迎世,毛际香,童敏,等.地下热泉的形成条件与地震[J].华南地震,2002,22(2):53-58.
[4]徐桂明,郑江荣,杨从杰,等.江苏05井—06井水温的中短期地震异常典型特征研究[J].地震研究,2010,33(4):274-280.
[5]晏锐,官致君,刘耀伟,等.川西温泉水温观测及其在芦山MS7.0地震前的异常现象.地震学报,2015,37(2):347-356.
[6]高小其,地里夏提,许秋龙,等.乌鲁木齐9、10号泉F—映震特征的研究[J].地震学刊,2002,22(1):5-11.