2014年云南鲁甸M_S6.5地震前水管倾斜特征分析

Analysis of Water Tube Tilt Feature before Ludian M_S6.5 Earthquake in 2014

选取2008年1月1日~2014年9月14日云南省前兆台网昭通、楚雄等6个台站的水管倾斜数据,通过对比同一台站、不同年份的水管倾斜年变曲线,对这6个台站的水管倾斜年变特征进行研究。对比分析了昭通、昆明等6个台站的水管倾斜在鲁甸MS6.5地震前的响应特征,结果表明：鲁甸MS6.5地震前昭通台水管倾斜EW向和楚雄台水管倾斜NS、EW向均表现出了一定的异常特征。

Basing on the water tube tilt data recorded by Zhaotong Station,Chuxiong Station etc. in Yunnan Precursor Network from Jan. 1,2008 to Sep. 14,2014,we compared the annual variation of water tube tilt at the same station in different years,and found the annual feature of water tube tilt at six stations. Then we analyzed the response of water tube tilt recorded by Zhaotong Station, Chuxiong Station etc. before Ludian MS6. 5 earthquake. The result show s that there appeared some abnormal feature on water tube tilt at Zhaotong Station and Chuxiong Station before the earthquake.