Jordan seismological Observatory (JSO) Engineer Ahmad Algazo

The JSO was established in 1983 , we have seventeen telemetry stations and twenty five strong motion ,the seismic information transmitted by microwave and GPRS and we receive all the information in central location (in Amman ) We analyze the data through siescomp3 softwear and seisan systems .

Seismicity The Dead Sea rift is a transform boundary between the Arabian and African plates, connecting the Red Sea spreading center in the south to the Taurus-Zagros collision zone in the north. The Dead Sea transform is about 1100 km. long, and separates the Sinai sub plate from the Arabian plate. A geological offset of about 105-110 km. (Quennell 1959; Freund et. al., 1970), has been accumulated along the transform since the Miocene at a mean rate of left lateral strike slip of ~ 5 mm/year. The Dead Sea transform is comprised of a series of en echelon main faults, forming pull-apart basin, among them the Dead Sea basin (Garfunkel et al., 1981; Ben –Avraham, 1985; and many others). Although the Dead Sea transform is the main source of the seismic activity in the Dead Sea region, there are highly populated areas within the neighborhood of active fault systems that branch off the Dead Sea transform, such as Carmel, Al-Karak Al-Fiaha, Wadi El-Sirhan, Zarqa Main, and Swaqa faults. The seismicity of the Dead Sea region is considered low to moderate, nevertheless some destructive earthquakes have been occurred and destroyed most of the urban areas in Jordan and Palestine, such as 362, 748, 1034, 1070, 1201, 1759, 1837, 1927, 1995, and others earthquakes, with magnitude greater than 6.0 degrees in Richter scale. After about 20 years of continuous operation of the seismic networks operated in the region about 9000 earthquakes were recorded in the region as shown in the seismicity map Figure.(2) , and as the map shows, most of the mapped faults in the region are active. The most populated areas of the Dead Sea region are vulnerable to strong earthquakes, that will most definitely occur in the future in this region along the Dead Sea fault system, which will be a major threat to the safety, social integrity and economics for the peoples of region. Earthquake hazard assessment no longer refers to single parameters such as the horizontal peak ground acceleration (PGA) as a quantifier of the hazard. The modern construction engineer requires information about the expected acceleration at frequencies similar to the natural frequencies of the building under design. To provide such

Earthquake Distribution (1900 -2015) Jordan Catalogue

JORDAN SEISMOLOGICAL NETWORKS (JSN) Broad Band Seismometer Short Period Seismometer Accelerograph MP Stations JORDAN SEISMOLOGICAL NETWORKS (JSN) Updated 2015

Guralp Digitizer Data Acquisition system (DAS ) Reftek -130

Type: Gurlap - CMG-3T (50 HZ) Three components broadband

L-4-3D sercel INC (1 HZ) Three components Reftek 151-120 three components broadband

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