新疆康苏25.30 m岩石地温应震特征初步分析
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摘要
以康苏25.30 m岩石地温监测结果为基础,分析观测点的应震特征,结果表明,岩石地温的前兆异常主要以短临震前异常为主,具有很好的重复性。主要特点包括:4级地震震前特征为高频突跳及温度的快速下降-持续-上升至背景值,地震往往发生在异常结束的5~30 h内;6级地震主要发生在温度的快速上升或下降变化后的异常持续中,高频出现在震前12 d前,且高频持续时间短。初步分析认为,观测点温度的异常特征主要与其地质构造环境及地下流体的参与密切相关。
Based on the results of Kangsu 25.30 m ground temperature,the seismic characteristics of observation points are analyzed,and the results show that precursory anomalies of ground temperature are mainly in the presence of short impending earthquakes,and have good repeatability. The main features include: ground temperature bring down'remain rise to the background value companied with radio-frequency component,the MS4 earthquake usually occur in 5 ~ 30 hours. The MS6 earthquake usually occur when the ground temperature rapid rise or fall and radio-frequency component often appears in 12 days ago with short duration. The reason for the good earthquake indicating sensitivity of the Kangsu 25. 30 m ground temperature is rather good relative of geology environment and underground fluids in the sites.
Based on the results of Kangsu 25.30 m ground temperature,the seismic characteristics of observation points are analyzed,and the results show that precursory anomalies of ground temperature are mainly in the presence of short impending earthquakes,and have good repeatability. The main features include: ground temperature bring down'remain rise to the background value companied with radio-frequency component,the MS4 earthquake usually occur in 5 ~ 30 hours. The MS6 earthquake usually occur when the ground temperature rapid rise or fall and radio-frequency component often appears in 12 days ago with short duration. The reason for the good earthquake indicating sensitivity of the Kangsu 25. 30 m ground temperature is rather good relative of geology environment and underground fluids in the sites.
引文
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[4]马瑾,马胜利,刘力强.地震前异常的阶段性及其空间分布特征[J].地震地质,1995,17(4):363-371.
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[6]史杰,高小其,魏若萍.哈萨克斯坦博古特2604号井水位异常特征初步研究[J].内陆地震,2006,20(4):353-359.
[7]木拉提江·阿不来提,闫玮,阿里木江·买买提依明,等.2016年11月25日新疆阿克陶MS6.7地震前兆异常分析[J].内陆地震,2017,31(2):222-228.