CGRG Bibliography of Canadian Geomorphology
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Author : Auld, D.R.; Dosso, S.E.; Oldenburg, D.W.; and law, L.K.
Date : 1992
Title : Monitoring temporal change in conductivity in the central Vancouver Island region, an area with past large earthquakes.
Publication : Canadian Journal of Earth Sciences
Issue : 29(4):
Page(s) : 601-608
Abstract
Two major eathquakes, magnitude 7.0 in 1918 and magnitude 7.3 in 1946, have occured in this century in the central region of Vancouver Island, British Columbia, Canada. Levelling data in the region indicate relative uplift of 4 mm.yr from 1977 to 1984, followed by subsidence at approximately the same rate over the next two years. In response to the observed elevation changes, a program was initiated to investigate if temporal changs in the geoelectical conductivity might be associated with earthquake occurrence. Beginning in 1986, magnetotelluric (MT) data have been measurd annually at a number of sites on central Vancouver Island to monitor long-term variability of the conductivity of the crust and upper mantle in the region. Robost processing techniques now used in the analysis of MT data enhance the possibility of detecting changes in the conductivity.
Bibliography of Canadian Geomorphology