Deformation related to the 1994 Liwa Earthquake derived from Geodetic Measurements.
Duquesnoy T., O. Bellier, M. Kasser, M. Sebrier, C. Vigny, I. Bahar.
The deformation field around the Southern Great Sumatran fault (GSF) in the vicinity of the February 15, 1994, Mw=6.8 Liwa earthquake has been determined by geodetic survey. Geodetic trilateration and Global Positioning System (GPS) measurements were carried out from experiment conducted in July 1991 in the Ranau lake - Liwa area. A second geodetic survey reoccupied the same stations in September 1994, seven month after the Liwa earthquake. Despite the limited number of benchmarks most of the geodetically measured field displacement appears to be related to the 1994 Liwa earthquake. In addition, we show that most of this coseismic deformation is localized along a narrow zone corresponding to the GSF segment with a right lateral displacement of about 70 cm.
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