A crustal deformation study of the Charlevoix seismic zone in Quebec.

Authors: Lamothe, PhilippeSanterre, RockCocard, Marc; Mazzotti, Stéphane
Abstract: First order spirit levelling and high precision GPS measurements have been used to quantify local deformations caused mainly by postglacial rebound in the Charlevoix seismic zone, the region with the highest concentrated seismic activity in eastern Canada. In this paper, part of the Canadian first order vertical network, measured from 1909 to 1991, is analyzed for repeating levelling lines. In addition, a part of a first order geodetic network along the Saint Lawrence River surveyed by GPS in 1991 and 2005, is processed. The coordinate changes of these geodetic points allows for the determination of horizontal and vertical velocities leading to information about the crustal deformation of this region. The results show a southeast drift trend in the horizontal, and general uplift trend in the vertical. These agree well with previous GPS surveys conducted on Canadian Base Network (CBN) pillars in eastern Canada and with geophysical postglacial rebound (PGR) models.
Document Type: Article de recherche
Issue Date: 1 September 2010
Open Access Date: Restricted access
Document version: VoR
Permalink: http://hdl.handle.net/20.500.11794/12412
This document was published in: Geomatica, Vol. 64, (3), 61-71 (2010)
Canadian Institute of Geomatics.
Collection:Articles publiés dans des revues avec comité de lecture

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