We present a mesh convergence test of the 3-d finite difference method for computing the electromagnetic response of a buried conductivityanomaly.
本文用三维有限差分法，在计算电导率异常的电磁响应时作了一次网格收敛试验。
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The geothermal anomaly, low velocity zone and high conductivity layer in crust, and frequent occurrence of strong earthquakes show that the study area is an active area of modern tectonization.