京津冀地区氡的数字化观测及其地震前兆监测效能评估
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摘要
京津冀地区已建成氡的数字化(气氡)观测井(泉)共12口,目前正在运行8口,其中有1口井观测的数值低于仪器检出限,故实际有效观测井(泉)为7口。文中系统分析2004年7口井(泉)气氡年、月、日动态特征,根据以往的水氡震例评估其地震中期、短期与短临前兆异常的可能性,认为多数井中有可能识别出以破坏年变规律为标志的中期前兆异常,但很难识别出以阶变或脉冲为特征的短期和短临前兆异常。文中还对比分析了同一口井(泉)气氡与水氡动态的差异性,发现气氡的动态稳定性明显不如水氡,这不利于气氡在地震短期或短临前兆异常监测中发挥作用。
12 wells(springs),using for o digitalized observation of radon(gas radon),have already been built in Beijing-Tianjin-Hebei region.Among them,8 wells are running.Because the radon value in one of the eight wells is less than limit of detection,there are only 7 wells(springs) that are used for effective observation.After systematically analyzing different the yearly,monthly and daily gas radon dynamic behaviors of 7 wells(springs) in 2004,and evaluating the possibility of precursory anomaly of earthquake's medium-term,short-term and short-impending-term by comparing with water radon,we consider that it is possible to make out the medium-term precursory anomalies which take the yearly regularity break as mark,and it is hard to make out the short-term and short-impending-term precursory anomalies which take step-change and impulse as mark.By analyzing behavior difference between gas radon and water radon in the same well(spring),we find that gas radon is less stable than water radon.It is not propitious to exert efficiency for gas radon in short-term or short-impending-term precursory anomaly monitoring.
12 wells(springs),using for o digitalized observation of radon(gas radon),have already been built in Beijing-Tianjin-Hebei region.Among them,8 wells are running.Because the radon value in one of the eight wells is less than limit of detection,there are only 7 wells(springs) that are used for effective observation.After systematically analyzing different the yearly,monthly and daily gas radon dynamic behaviors of 7 wells(springs) in 2004,and evaluating the possibility of precursory anomaly of earthquake's medium-term,short-term and short-impending-term by comparing with water radon,we consider that it is possible to make out the medium-term precursory anomalies which take the yearly regularity break as mark,and it is hard to make out the short-term and short-impending-term precursory anomalies which take step-change and impulse as mark.By analyzing behavior difference between gas radon and water radon in the same well(spring),we find that gas radon is less stable than water radon.It is not propitious to exert efficiency for gas radon in short-term or short-impending-term precursory anomaly monitoring.
引文
[1]车用太,王吉易,李一兵,等.首都圈地下流体监测与地震预测[M].北京:地震出版社,2004.22-29.
[2]车用太,孔令昌,陈华静,等.地下流体数字观测技术[M].北京:地震出版社,2002.32-43.
[3]张炜,李宣瑚,鄂秀满,等.水文地球化学地震前兆观测与预报[M].北京:地震出版社,1992.
[2]车用太,孔令昌,陈华静,等.地下流体数字观测技术[M].北京:地震出版社,2002.32-43.
[3]张炜,李宣瑚,鄂秀满,等.水文地球化学地震前兆观测与预报[M].北京:地震出版社,1992.
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