判识水氡地震前兆的方法——以甘肃清水温泉水氡异常为例

doi:10.12196/j.issn.1000-3274.2020.04.016

Abstract

Abstract: Correct judgements for anomaly features is the precondition for enhancing our ability to do the earthquake prediction. According to relative statistic, the true anomalies of earthquake are quite limited. It is important to study the relationship between the precursors and following earthquakes. The radon of Qingshui hot spring fluctuated drastically the 4th month before Jiuzhaigou M_S7.0 earthquake on August 8, 2017. In order to identify the relationship between the radon anomaly and the earthquake, the cause and mechanism of this radon anomaly were studied deeply by pumping tests, analyzing isotopes and hydrochemistry components of Qingshui hot spring.The seismogenic structure of Jiuzhaigou earthquake and some other anomalies were also analyzed. The results showed that the test results are consistent with the actual observation. The water radon variation is positively correlated with water level variation but with water temperature.The proportion of fluid from deep crust did not increase according to composition of hydrogen and oxygen isotope and hydrochemistry. There seems to be little probability of seismogenic process of Jiuzhaigou earthquake caused rupture of Qingshui hot spring area.The radon anomalous of Qingshui hot spring is not the short-term anomaly for the 2017 Jiuzhaigou M_S7.0 earthquake. It was caused by manual pumping. This study provides a more reliable method for identifying the anomalies of fluid before earthquakes.

Key words: The 2017 Jiuzhaigou M_S7.0 earthquake, Water radon of Qingshui hot spring, Pumping test, Hydrochemical components, Hydrogen and oxygen isotope

CLC Number:

P315.7

SU He-jun, CAO Ling-ling, ZHANG Hui, LI Chen-hua, ZHOU Hui-ling. The Method for Identify the Earthquake Precursor of Water RadonTaking the Water Radon Anomaly of Qingshui Hot Spring in Gansu Province As an Example[J]. EARTHQUAKE, 2020, 40(4): 198-213.

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The Method for Identify the Earthquake Precursor of Water RadonTaking the Water Radon Anomaly of Qingshui Hot Spring in Gansu Province As an Example

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