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F.A. Bou-Rabee  M. Niazi 《Tectonophysics》1991,190(2-4):381-387
Nearly 150 measurements of the total magnetic field intensity were made in Kuwait in early 1988. Observation points are located primarily along major highways over lines varying in length from few to several tens of kilometers. Measurements were made with a proton magnetometer. Station spacing varied from nearly 1 to 5 km. Diurnal correction to the data was made possible by frequent excursions to the base station.

Preliminary analysis of the data indicates that the field intensity undulates in SW-NE direction nearly perpendicular to the regional tectonic trend. The amplitude of these variations range approximately from 30 to 90 γ over wavelengths varying nearly from 38 to 70 km. We have made a combined inversion of the data with the unpublished Bouguer gravity map of the country along a N-S profile in the central region and find that the data are reasonably well matched with predictions of a simple two-dimensional block model. The model consists of a layer overlying a half-space. The variables of the model are the thickness and density of the surface layer and the susceptibility of the basement rock. The observed variation of the magnetic field and Bouguer anomalies for the selected profile may be accounted for either by the simultaneous northward density reduction of about 0.06 g/cm3 in the surface layer and approximately 15% increase of the basement susceptibility, or else by nearly 800 m variation of the sedimentary thickness.  相似文献   

2.
This paper points to the need for seismic risk and vulnerability assessment of infrastructure systems, most notably tall structures and coastal facilities, in Kuwait and other Arabian Gulf countries. Building codes in the region currently lack seismic provisions, despite evidence of a potential threat from large-magnitude earthquakes originating from the southern part of the Zagros fold belt. The historical record of Iranian earthquakes that may have caused significant ground motion in the Gulf region is examined, as are reports of coastal damage from tsunamis. Various specific tasks, expected to constitute research priorities of a Joint Center for Risk Research, a cooperative research program involving Princeton and Kuwait Universities, are outlined.  相似文献   
3.
On March 1997, earthquake monitoring was started inKuwait through the operation of the Kuwait NationalSeismograph Network (KNSN). On Sept. 18, 1997, anearthquake of magnitude 3.9 occurred in the Minagisharea (southwest of Kuwait); it was felt in Kuwait City50 km away from the epicenter which was accuratelylocated using the data of KNSN. Also, some eventswere located in Minagish area and along the westernborders of the State of Kuwait. The same area ofMinagish was shocked on June 2, 1993 with a 4.7magnitude earthquake; it was also felt in Kuwait City. The spatial distribution of the Minagish areaearthquake may show a trend of NE-SW direction. Theisoseismals of the Sept. 18, 1997 earthquake aregenerally elliptical in shape with the major axisoriented NE-SW. The geologic sections and tectonichistory of Kuwait show seismotectonic deformationsince late Eocene time. This activity is related tothe interaction of the Arabian platform and the Zagrosfolded belt. A major break in the sedimentarysuccession which occurred in Kuwait during Eocene andOligocene times indicates that nascent folding anduplift have persisted since that time. The formationof the major topographical feature in Kuwait(Jal-Az-Zor escarpment, Wadi Al-Batin and AhmadiRidge) can be attributed to tectonic activity since Eocene time.The spatial distribution of the recent earthquakeactivity in Kuwait is associated with the surface andsubsurface tectonic structures. The moderate sizeearthquake activity of the State of Kuwait can beconsidered as evidence of recent rejuvenation of thetectonic structures which have been active since Eocene time.  相似文献   
4.
Bou-Rabee  Firyal  Young  Yin Lu  Okal  Emile A. 《Natural Hazards》2020,103(1):799-813

This paper presents and analyzes paleo-liquefaction features found in the State of Kuwait. The features are cemented sand and gravel-filled dikes of Pleisto–Holocene age with appearance and composition similar to typical “sandstone pipes.” The significant age difference between the cemented dikes and the surrounding loose sand, the size and spatial distribution of the dikes, and the local geologic and hydrologic setting all suggest that the feature probably results from a single large event of seismic origin. Likely hypotheses include shaking during large earthquakes or seiching of tsunami-like waves. Additional research is needed to identify the exact cause of these dike formations, which is important for the purpose of improving seismic risk and vulnerability assessment of the Arabian Gulf countries. The search may also help explain the disappearance of an ancient civilization that lived in the same region approximately seven thousand years ago.

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