Abstract

Based on tensor decomposition technique, we have analyzed the dimensionality of magnetotelluric (MT) data and propose a 2‐D electrical model characterized by a high conductive anomaly beneath Sanyi‐Puli seismic zone, a distinct NW‐SE trending linear seismic zone in the fold‐thrust belt of NW Taiwan. Fluid pressurization indicated by the highly conductive anomaly may result in the active seismicity in Sanyi‐Puli seismic zone and, particularly, may also induce the large slip associated with high static stress drop in the northern part of the fault rupture process for the 1999 Chi‐Chi, Taiwan, earthquake.

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