Study and Monitoring the Recent Faults Movement at Haql Area at the Far North-Eastern Part of the Kingdom of Saudi Arabia

SGS-OF-2006-3 Mohammed Al-Khatheri, Mohammed Al Zahrani, and Mesbah Al-Arna’out
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ABSTRACT
This report has been prepared by the Geohazard and Engineering Geology team of Saudi Geological Survey in order to investigate and monitor the movement of recent faults in the Haql coastal area, on the eastern side of the Gulf of Aqaba, which occurred after the 1995 earthquake, and also to present the impact of such movements on the urbanization of that area in the form of a fault-hazard zonation map. A number of faults were selected for geomorphological description; surface extensometers and their offsets were periodically monitored.  A hazard zonation map was constructed showing the zonation of the selected faults in the study area, which is 11 km long.  Eleven stations were selected in order to measure changes in displacement.  The results of almost one-year of periodic monitoring and comparison between the essential reading and three different periodical readings, show that these faults are active and the general movement of displacement is towards a left convergence.  At all sites selected it was found that the maximum magnitude of the perpendicular displacement on the active faults is 2.1 cm or less in a converging direction.  The maximum change on the shear movements along the parallel axis of the faults does not exceed 3.7 cm towards a left lateral displacement.  Therefore, in the event of future investment in these areas, the investors should review the hazard zonation map of this area and the construction of buildings should be avoided.

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Al-Khatheri, M., Al Zahrani, M., and Al-Arna’out, M., 2006, Study and monitoring the Recent faults movement at Haql area at the far north-western part of the Kingdom of Saudi Arabia: Saudi Geological Survey Open-File Report SGS-OF-2006-3, 111 p.