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NUMERICAL SIMULATION OF GEOELECTRICAL FIELD RESPONSE TO OSCILLATING DIPOLE SOURCE IN HETEROGENEOUS CRUST
Author(s): 
Pages: 193-198,219
Year: Issue:  3
Journal: NORTHWESTERN SEISMOLOGICAL JOURNAL

Keyword:  振荡电偶极子电场数值模拟;
Abstract: 以数值模拟方法对层状介质中振荡电偶极子电场进行了研究.结果表明:(1)在典型层状介质结构下,地表不可能观测到此种信号源产生的电场信息.(2)有断层存在时地表偶极子电场值可增大2~3个量级.在常见的地壳电性结构中,地表可得到零点几至几毫伏每公里的异常;在特殊电性结构中可达上百毫伏每公里.电场强度的最大点并不在震中,而是在断层带上.这表明地下介质的不均匀性一方面有利于地电异常的观测,另一方面也是引起地表电场异常出现复杂性的原因.
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