【摘要】 2008年汶川8.0级地震发生前,云南永胜水管倾斜测值北南向出现将近一年大幅度趋势南倾异常,东西向自2007年7月向西倾变化,且速率比以往快。在排除气压、降雨等干扰因素影响后,通过异常形态、持续时间、观测点所处构造,分析了该异常与汶川地震的关系,结果表明在强地震孕育阶段,永胜水管倾斜有长期趋势异常。更多还原

【Abstract】 Before Wenchuan M8. 0 earthquake on M ay. 12,2008,the water-pipe tilt observation value in NS direction appeared a substantial anomalous trend of south tilt recorded by Yongsheng Station in Yunnan for nearly one year,while the observation value in EW direction changed to west tilt,and its rate was faster than ever before.After removing the pressure,rainfall and other interference factors,we analyzed the relationship between the water-pipe tilt observation value anomalies and the Wenchuan M8. 0 earthquake through the anomalous patterns,duration time and the tectonic where the observation points located,and concluded that there existed long-term anomalous trends for water-pipe tilt observation value at Yongsheng Station during the seismogenic processes of strong earthquakes.更多还原