滇9井在中强地方震前的地下流体动态特征  

Dynamic Characteristics of Underground Fluid Surveyed in No.9 Well before the Occurrence of Moderate-strong Earthquakes in Yunnan

作　　者：赵家本[1] 

机构地区：[1]中国地震局滇西地震预报实验场,云南大理671000

出　　处：《地震研究》2004年第1期30-36,共7页Journal of Seismological Research

摘　　要：对滇 9井 (邦纳掌温泉 1号泉 )所观测到的地下流体动态特征进行了研究。结果表明 ,在近源区中强地震前 (距该井 4 0km范围内 ) ,该井地下流体中的水氡、水温、流量等有异常幅度大 ,异常时间同步性好的特征 ,而且异常至发震间隔时间短 。The dynamic variation of underground fluid surveyed through No.9 well (namely the No.1 spring in Bannazhang) in Yunnan Province is studied. The result shows that before the moderate-strong earthquakes in the near-source area (within the range of 40km around the well), the radon, the temperature of the water, the flow quantity have the following three features:①The amplitude of the anomaly is large.②The anomaly is synchronous.③The period between the appearance of anomaly and the occurrence of earthquake is short. So the dynamic features of the underground fluid are significant for the short-impending earthquake prediction.

关 键 词：地下流体 动态特征 中强地方震 短临预报 

分 类 号：P315.7[天文地球—地震学]