7级以上强震前水温月超差个数异常分析

Research on the anomaly of month overproof number of the water temperature before earthquake M_s≥7.0

选取近年来中国大陆及周边3次7级以上地震,对周边地震一定范围内"十五"数字化水温台站的月超差个数进行统计分析。结果表明,2010年玉树7.1级地震前,周边700km以内77%的水温台站出现月超差个数的向上突跳异常。2011年缅甸7.2级地震前,未发现此项异常。2013年芦山地震前,周边700 km内仅有13%的水温台站出现此项异常。这3次7级以上地震,震前不同的月超差个数异常特征,应与每次地震不同的发震构造和孕震过程有关。目前,此项异常震例较少,且仅在青藏高原有明显的前兆意义。

In this paper,taking three earthquakes MS ≥7.0 as example,the anomaly of month overproof number of water temperature data recorded by digital stations around the epicenter are analyzed.It is found that the 77% of month overproof number of water temperature showed anomaly with impulse jumps within 700 km from the epicenter before Yushu MS 7.1 earthquake,2010,however,it seemed that there was no such anomaly before Burma MS 7.2 earthquake,2012,as well as there were only 13% of month overproof number of water temperature showed such anomaly before Lushan MS 7.0 earthquake,2013.The anomaly of month overproof number of water temperature data before such three large earthquake should be related to their causative structure and pregnant process.The earthquake cases with such anomaly are not too many,and it is showed that the anomaly of month overproof number of water temperature data has some precursor significance in Qinghai-Tibetan plateau at present.