大姚6.2级地震前云南地区水氡中短期异常及其地震预测意义

The Mid-Short Term Radon Anomaly Before M6.2 Dayao Earthquake and Its Significance in Earthquake Prediction

对2003年7月21日大姚6.2级地震前云南地区水氡观测资料进行了系统的处理,在此基础上对大姚地震前云南地区水氡中短临异常分布范围、数量及其与发震时间关系等特征进行了分析,这对未来强震水氡异常的识别和分析有一定的实用价值,特别是对长时间平静后的强震中短期预报有一定的实际意义。

Based on the observational data of M6.2 Dayao earthquake happened in Yunnan Province on July 21, 2003, systematic analysis on radon information has been studied. The anomalous distribution range of radon, features of anomaly and its relation with the time of earthquake occurrence have been obtained. It is valuable for us to distinguish and analyze the abnormal changes in radon observation, which is especially significance for mid-short term earthquake prediction.