积石山M6.2地震前通渭东川地震台流体观测数据异常分析

ANOMALY ANALYSIS ON THE OBSERVATIONAL DATA AT THE DONGCHUAN STATION IN THE TONGWEI COUNTY BEFORE THE JISHISHAN M6.2 EARTHQUAKE

2023年12月18日甘肃省临夏回族自治州积石山发生M6.2地震,震前通渭东川地震台流体观测井水温和气氡浓度值出现异常。通过分析地震前后水温和气氡浓度数据,发现水温值出现“下降-保持低值-回升(震时)”的异常变化过程,气氡浓度值出现上升,且与水温下降有较好的对应性。因此认为水温和气氡浓度变化有可能是积石山M6.2地震的前兆异常。

An M6.2 earthquake occurred in the Jishishan County,Linxia Prefecture,Gansu Province on De-cember 18th,2023.Before the earthquake,the water temperature and gas radon concentration value of the flu-id observation well at the Dongchuan Station in the Tongwei County were abnormal.By analyzing the observa-tional data of water temperature and gas radon before and after the earthquake,it is found that the water tem-perature value has an abnormal change process of"decreasingkeeping a low value-rising(as the earth-quake occurs)",the gas radon concentration value increased,which is in good correspondence with the de-crease in water temperature value,therefore,it is believed that the change of water temperature and gas radon may be the precursor anomalies before the Jishishan M6.2 earthquake.