Theoretical research on geoelectric anomaly caused by streaming potential during earthquake preparation

摘要

The surface streaming potential anomalies (SSPA) for a buried symmetrical pressure source in homogeneous and anisotropic layered half space are calculated separately in this paper. The results show that the maximum of SSPA calculated using the two models are reasonable and are about several hundred mV. The range in which SSPA can be detected on the earth￠s surface varies with the intensity of medium anisotropy. Anisotropic crack is introduced to calculate the magnitude of SSPA, so theoretically the contradiction between observation data and theoretical results is interpreted more reasonably.