甘肃地区水氡(流量)异常与周边中强地震的关系探讨
|
摘要
甘肃及周边地区是一个中强震多发区,该地区的前兆异常对青藏高原北缘地区强震活动有着敏感的反映。1980年以来该区发生5.0级以上地震20余次。多次地震前,甘肃地区的水氡资料出现了大量的中短期异常。分析了甘肃省目前仍在继续观测、观测环境较好、仪器稳定的水氡测点在甘肃及周边地区发生的中强地震前资料的变化情况,发现多数测点在多次地震前存在明显的中短期异常,有些为短临异常。嘉峪关气氡映震效果最好,异常形态以破年变为主。武山1号泉水氡和天水花牛水氡也以破年变或低值异常为主,清水流量以高值异常为主。某些大震前以同步变化的趋势异常为主。
Medium earthquake often occurrs in Gansu and its adjacent areas,the precursory anomalies can sensitively reflect the strong earthquakes in the northern Tibetan Plateau.More than 20 earthquakes with M≥5.0 have occurred in this area since 1980.There were plentiful medium and short term anomalies of water radon before some earthquakes in Gansu region.This paper analyzed the change of data in the water radon points in Gansu province before medium earthquakes,which had continuously observation,best observation environment and stable instrument,and found obvious medium-short term anomalies or short-impending anomalies appearing before some earthquakes in most points.The earthquake-reflecting effect of gas radon is best in Jiayuguan and the anomalous shape mainly is broken annual variation.Precursory anomalies of water radon in Wushan 1st spring and Tianshui Huaniu are mostly broken annual variation or low value anomaly,precursory anomaly of Qingshui flow is high value anomaly.The main anomaly appearing before some big earthquakes is trend anomaly of synchronized change
Medium earthquake often occurrs in Gansu and its adjacent areas,the precursory anomalies can sensitively reflect the strong earthquakes in the northern Tibetan Plateau.More than 20 earthquakes with M≥5.0 have occurred in this area since 1980.There were plentiful medium and short term anomalies of water radon before some earthquakes in Gansu region.This paper analyzed the change of data in the water radon points in Gansu province before medium earthquakes,which had continuously observation,best observation environment and stable instrument,and found obvious medium-short term anomalies or short-impending anomalies appearing before some earthquakes in most points.The earthquake-reflecting effect of gas radon is best in Jiayuguan and the anomalous shape mainly is broken annual variation.Precursory anomalies of water radon in Wushan 1st spring and Tianshui Huaniu are mostly broken annual variation or low value anomaly,precursory anomaly of Qingshui flow is high value anomaly.The main anomaly appearing before some big earthquakes is trend anomaly of synchronized change
引文
[1]刘耀炜,范世宏,曹玲玲.地下流体中短期异常与地震活动性指标[J].地震,1999,19(1):19-25.
[2]刘耀炜,施锦.强震地下流体前兆信息特征[J].地震学报,2000,22(1):102-107.
[3]阴朝明,高荣胜,付子忠,等.地震前兆台网观测技术[M].北京:地震出版社,2001.
[4]陈华静,张朝明,朱方保,等.气体数字化观测气水分离装置研究[J].地震,2002,22(1):105-109.
[5]孟晓春.地震信息分析技术[M].北京:地震出版社,2005.
[6]张立,赵洪声,刘耀炜,等.云南会泽井水位与水温相关关系及其变异的地震预测意义[J].地震研究,2009,32(3):228-230.
[7]车用太,孔令昌,陈华静,等.地下流体数字化观测技术[M].北京:地震出版社,2002.
[8]耿杰,冯志军,吴春华.聊古一井数字化氡与模拟水氡观测资料的对比评价[J].地震,2002,22(4):81-88.
[9]杜方,吴江.昆仑山口西8.1级地震引起的地下流体远场响应研究[J].地震研究,2008,31(3):197-202.
[10]张昱,张占斌,曹喜,等.嘉峪关气氡映震情况讨论及玉门地震前水氡(嘉峪关、酒泉)异常特征[J].地震地磁观测与研究,2004,25(1):78-82.
[2]刘耀炜,施锦.强震地下流体前兆信息特征[J].地震学报,2000,22(1):102-107.
[3]阴朝明,高荣胜,付子忠,等.地震前兆台网观测技术[M].北京:地震出版社,2001.
[4]陈华静,张朝明,朱方保,等.气体数字化观测气水分离装置研究[J].地震,2002,22(1):105-109.
[5]孟晓春.地震信息分析技术[M].北京:地震出版社,2005.
[6]张立,赵洪声,刘耀炜,等.云南会泽井水位与水温相关关系及其变异的地震预测意义[J].地震研究,2009,32(3):228-230.
[7]车用太,孔令昌,陈华静,等.地下流体数字化观测技术[M].北京:地震出版社,2002.
[8]耿杰,冯志军,吴春华.聊古一井数字化氡与模拟水氡观测资料的对比评价[J].地震,2002,22(4):81-88.
[9]杜方,吴江.昆仑山口西8.1级地震引起的地下流体远场响应研究[J].地震研究,2008,31(3):197-202.
[10]张昱,张占斌,曹喜,等.嘉峪关气氡映震情况讨论及玉门地震前水氡(嘉峪关、酒泉)异常特征[J].地震地磁观测与研究,2004,25(1):78-82.
版权所有：© 2023 中国地质图书馆 中国地质调查局地学文献中心