MONITORING VERTICAL MOVEMENTS IN MOUNT CARMEL BY MEANS OF GPS AND PRECISE LEVELLING

摘要

Mount Carmel fault is one of the major geological structures in northern Israel, characterized by intense, continuous, and potentially hazardous seismic activity. A small monitoring network, spanning an area of 40 by 30 km. and consisting of 17 points, was constructed. Four sets of GPS measurements were taken between 1990 and 1999 as well as two campaigns of precise levelling. Two-Step analysis of the GPS measurements was carried out to quantify recent vertical tectonic deformations. Strict analysis of the GPS and the levelling data shows significant vertical movements in the area. Two independent methods are pointing to the same vertical behavior at the monitored region, indicating that the Carmel range uplifts at a rate of 5 mm per year relative to its surroundings.