云南地下流体对尼泊尔8.1级地震的同震响应特征分析

Analysis on Coseismal Response Characteristic of Underground Fluid Related to Nepal M8.1 Earthquake in Yunnan

统计云南地下流体对尼泊尔8.1级地震的同震响应情况,分析和总结了水位和水温数字化资料的同震响应特征。结果表明:尼泊尔8.1级地震对云南地区的影响较大,其流体宏观与微观动态有较显著的同震响应。水位与水温对该大地震的记震能力明显高于水氡和水质;不同井水位、水温同震响应最大振幅、持续时间相差很大,其变化形态水位以波动及阶升为主,水温表现为上升或下降—恢复;从主震与最大强余震的记录来看,震级越大,同震响应出现比例越高,且在同井中响应幅度越大,持续时间越长;同井不同仪器记录的同震幅度和持续时间不同;水温同震响应均出现在有水位同震响应井中,表明井水位与水温同震响应是密切相关的,且井水温同震响应多由井水位同震响应引起。

The coseismal responses of underground fluid in Yunnan related to Nepal M8.1 earthquake were made statistical,and its characteristic was also analyzed.The results showed that Nepal M8.1 earthquake had great impact on Yunnan region,where the significant coseismal responses appeared in both the macro and micro dynamics fluid data.The recording earthquake ability of water level and water temperature related to Nepal M8.1 earthquake is higher than that of water radon and water quality.The maximum amplitude and duration of the co-seismic response recorded by water level and water temperature had great difference in different wells,and the tendency of water level mainly showed fluctuations and ascending order,and the tendency of water temperature showed rise or drop-recovered.According to the recordings of main shock and the largest aftershock,the greater magnitude of the earthquake,the higher proportion of the coseismal responses.Meanwhile,the larger of the amplitude of coseismal responses,the longer of the duration in the same well.The coseismal amplitude and duration measured by different instruments were different in the same well.The coseismal responses of water temperature were also appeared in all wells where the coseismal responses of water level,which indicated that there is an important relation of coseismal responses between water level and water temperature,and most of the coseismal response of water temperature was caused by the coseismal response of water level.