南黄海地震前江苏地磁Z_(21)相关系数异常分析

Analysis of abnormal correlation coefficient of geomagnetic Z 21 in Jiangsu Province before the South Yellow Sea earthquake

通过对江苏地区７个地磁台多年地磁Ｚ２１资料相关分析，检出地磁Ｚ２１相关系数异常与该区东部南黄海两次ＭＳ≥５．０地震有较好的对应关系。地震前地磁相关系数异常。

By using the method of correlation analysis to Z 21 recorded in seven geomagnetic stations in Jiangsu Province for many years,we found that the abnormal correlation coefficient had good relationship with the two south Yellow Sea earthquakes of M S≥5 0.The result that the geomagnetic correlation coefficient is abnormal before an earthquake is significant for monitoring short term precursors of moderate earthquakes.