A complete and homogeneous magnitude earthquake catalogue of Iraq

Al-Heety, Emad A.

doi:10.1007/s12517-013-1131-y

Cited by 6 publications

(7 citation statements)

References 18 publications

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“…The moment magnitude (Mw) was selected as the unified magnitude scale for seismicity and assessment of seismic hazard because it more correctly characterizes the earthquake source size [10]. The earthquake catalog of the study area was unified and homogenized with respect to Mw.…”

Section: Unified Magnitudementioning

confidence: 99%

Seismicity of Iraqi western desert and surroundings: As an example of continental intraplate seismicity

Al-Halboosi

Mohammad

Al-Heety

2022

IOP Conf. Ser.: Earth Environ. Sci.

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Seismicity of Iraqi western desert and surroundings was investigated using a complete and unified magnitude earthquake catalog covering the interval from 1900 to 2017. A marked rise in number of the events in the study area was observed after the year 2000 compared to the previous years. The magnitude of majority of the recorded events ranged from 2 to 3.5 Mw. The value of b-constant in frequency-magnitude relation is 0.7. The epicentral distribution shows that the western desert is aseismic to very low seismicity area compared to the surrounding regions. The epicenters were clustered in five seismogenic zones. The focal depths division of the events exhibits that majority of the earthquakes occur in the upper crust. A causal relation may be between the study area seismicity and the zones of weakness and /or stress condensation at the fault intersections.

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Section: Unified Magnitudementioning

confidence: 99%

Seismicity of Iraqi western desert and surroundings: As an example of continental intraplate seismicity

Al-Halboosi

Mohammad

Al-Heety

2022

IOP Conf. Ser.: Earth Environ. Sci.

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“…According to the seismic maps, north and northeast of Iraq fail in an active seismic zone northeast boundary of Arabian plate and Zagros-Taurus Belts [4,9]. Decades of seismic inactivity was noticed since subduction stopped millions of years ago [9].…”

Section: Earthquake's History In Iraqmentioning

confidence: 99%

“…Decades of seismic inactivity was noticed since subduction stopped millions of years ago [9]. However, seismologists recorded more than one thousand earthquakes between 1900 and 2010 [1,4], [9][10][11][12][13][14].…”

Section: Earthquake's History In Iraqmentioning

confidence: 99%

“…Specified seismic regions have been considered for different time intervals. For instance, Ameer et al (2005) [14] summarized earthquakes events in Iraq for the con-fined area between latitude (29-38.5° N) and longitude (39-50° E) including more than one thousands of earthquake above 4.0 in magnitude [4,14]. Figure 4 shows the seismicity map of Iraq of the 95 years for earthquakes above 3.0 Ms [14].…”

Section: Earthquake's History In Iraqmentioning

confidence: 99%

“…Second Earthquakes data sets have been normally presented in two magnitude scales, surface-wave magnitudes (Ms), and body magnitude wave (Mb). How-ever, other magnitude scales, moment magnitudes (Mw), and local magnitudes (ML), and duration magnitudes, (M D ), are used but not often [4]. The epicenter map of the earthquakes of the magnitude scale in Iraq from 1900-2010 is shown in Figure 2 [4].…”

Section: Introductionmentioning

confidence: 99%

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Dynamic Response Spectrum of Multi-Story Shear Frame Subjected to Moderate Ground Motion

Hussein

2021

DJES

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Design structures to resist natural hazards is a vital issue to mitigate the impact of such threats. Earthquakes could lead to numerous injuries and infrastructure destruction. Specifically, when structures are not designed to resist seismic load. This article presents dynamic analysis of four-story shear frame under moderate ground motion to determine the dynamic response. The proposed location of the considered frame is near Iraq-Iran border due to increase of seismic activities in last years. Structures in the considered seismic zone are essentially either residential or commercial buildings and not designed to resist seismic load, therefore structural system failure is probable. Simplified model is considered to determine response spectrum according to the International Building Code requirements. The algorithm of the analysis is developed using MATLAB® code to get mode shapes, response spectrum acceleration, maximum displacement, maximum shear forces, and modal participation mass at each story. The article develops design response spectra curve of Erbil city. Furthermore, the analysis results showed that first mode shape has more contribution than the other modes because higher percentage of the mass of the shear frame responds to the ground motion, and 88.53% of shear-frame mass is participating responds to the ground motion in the same mode

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