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新20号井水位异常特征分析
ANALYSIS ON ABNORMAL CHARACTERISTICS OF WATER LEVEL OF NEW NO.20 WELL
【摘要】 运用m apsis软件前兆异常分析中的差分、从属函数和变差对新20号井水位进行异常识别,结果认为:(1)差分、从属函数和变差异常形态均为高值异常;(2)差分和变差对近场MS≥5地震漏报率较高,但有异常出现时,后续往往有地震对应,而从属函数对近场MS≥5映震率为66.7%,对远场MS≥7映震率为71.4%;(3)差分最大异常量与震级基本成正比,而与震中距基本上成反比。从属函数最大异常量与震级关系不明显,而与震中距基本上成反比。变差的震例较少,暂不分析。
【Abstract】 Using difference,subordinate function and variogram methods in Mapseis soft to analyze the anomaly of water level in New No.20 well,the result shows,(1) the abnormal configuration is high value anomaly;(2) the missed event ratio of difference and variogram is high for the MS≥5 earthquakes in the near region;once the abnormities appear,there will be corresponding earthquakes occurring;the reflection ratio is 66.7% for the subordinate function in the near region and 71.4% for the MS≥7 in the far region;(3)it is positive relation between maximum abnormal range and magnitude for difference,but it is reverse relation between maximum abnormal range and epicenter distance for difference;though there is inconspicuous relation between maximum abnormal range and magnitude for subordinate function,it is reverse relation between maximum abnormal range and epicenter distance;the earthquake cases is less for variogram,so it is not analyzed in this paper.
【Key words】 New No.20 well; Abnormal characteristics; Difference; Subordinate function; Variogram;
- 【文献出处】 内陆地震 ,Inland Earthquake , 编辑部邮箱 ,2011年02期
- 【分类号】P315.72
- 【被引频次】3
- 【下载频次】33