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Sanyi‐Puli conductivity anomaly in NW Taiwan and its implication for the tectonics of the 1999 Chi‐Chi earthquake
Author(s) -
Chen Chienchih,
Chen Chowson
Publication year - 2002
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/2001gl013890
Subject(s) - geology , magnetotellurics , seismology , tectonics , induced seismicity , anomaly (physics) , slip (aerodynamics) , electrical resistivity and conductivity , thermodynamics , physics , engineering , condensed matter physics , electrical engineering
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.