Article,

Fault geometry and spatial clustering of microeartquakes along the Dead Sea -- Jordan rift fault zone

, and .
Tectonophysics, 180 (1): 15--27 (Aug 1, 1990)
DOI: 10.1016/0040-1951(90)90368-I

Abstract

Earthquakes (1.0 <= ML <= 5.3) in the region around the Dead Sea-Jordan rift fault zone, recorded by the Israel Scismograph Station Network (ISSN) from 1982 until the beginning of 1989, have been analyzed and interpreted. The scismicity pattern clearly reveals activity along three fault zones: the Dead Sea-Jordan rift fault zone, the Carmel-Faraa fault zone and the Central Sinai/Negev shear zone. Microearthquake occurrence tends to cluster in or near tensional features (rhomb-shaped grabens) such as the Hula, Sea of Gallilee and Dead Sea depressions. Further, eight representative focal mechanisms of individual earthquakes or earthquake clusters have been derived. The seismicity and focal mechanism solutions near the branching of the Carmel-Faraa and the Dead Sea-Jordan rift fault zones suggest a complicated tectonic breakup in this region. Microearthquakes in the Arava may indicate a more complex pattern of active faults than was previously assumed.

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