东北地区地磁LURR中强震指标研究

Research on Moderately Strong Seismic Index of LURR in Northeast China

地磁LURR能够反映地壳介质电导率的变化,通过计算2008-2018年东北地区地磁LURR,归纳总结东北地区地磁LURR背景值及统计M≥4.9地震发生前6个月内地磁LURR特征,结果表明,假设东北地区地磁LURR≥3.06作为该地区的最佳阈值,异常台站多于两个时能够大幅度提高中短期预测的成功率。

Geomagnetic LURR can reflect the change of the conductivity of crustal medium.By calculating the geomagnetic LURR in Northeast China from 2008 to 2018,the background value of geomagnetic LURR in Northeast China and the characteristics of geomagnetic LURR in the interior six months before the M≥4.9 earthquake are summarized.The results show that if the geomagnetic LURR>3.06 in Northeast China is assumed to be the optimum threshold of the region and the anomalous stations are more than two,the short-term and medium-term The success rate was measured.