Seismicity evaluation of central and southern Iraq

Other Title(s)

التقييم الزلزالي لوسط و جنوب العراق

Dissertant

Jasim, Nur Adnan

Thesis advisor

Abbas, Nawal Abd al-Rida

University

University of Baghdad

Faculty

College of Science

Department

Geology Department

University Country

Iraq

Degree

Master

Degree Date

2013

English Abstract

The present study deals with evaluating the seismicity of central and southern Iraq , bounded by the longitude (39-48) E and latitude (29-34) N, during the period from (1980-2011).

More than (145) events were re-analyzed in Iraqi Seismological Network (ISN) and the recorded data was subjected to statistical analysis to calculate the relation between total number of events with the duration of oscillation, the distribution of (s-p) with magnitude, and the temporal distribution for the study area.

The tectonic results acquired from this study were correlated with the available seismicity data; the correlation has shown that there is mutual relationship between earthquake epicenters and tectonic lineaments especially in the south-east, Iraq-Iran boundaries which found that some epicenters lay along or very close to the fault or lineament, and some other lay on lineaments intersections.

A frequency- Magnitude for the study area was presented and the values of (b) constant were computed to be (-0.16) and (-0.83).

Which indicate a very low to moderate seismic tectonic activity and that change in activity may be due to the change in tectonic setting of the region.

Moment Magnitude (Mw) body wave magnitude (Mb), surface wave magnitude, (Ms), duration magnitude (Md) and Richter local Magnitude (ML) were calculated for the events.

The epicentral distances (Δ) and (E) energy were also calculated, and focal depth was found to be shallow ranged from (5-27.7) Km.

The value of intensity range from 1.1-6.7 and this values used to abstract the earth acceleration value for the event of the study area which ranging between 0.8- 57.5 cm/sec2 Fault plane solutions for the study area were studied too, supported by many researchers solutions, and it shows reverse strike slip solutions along planes with NW-SE.

Main Subjects

Earth Sciences, Water and Environment

Topics

• Earthquakes
• Geology
• Iraq
• Structural geology

No. of Pages

138

Table of Contents

• APA
• MLA
• AMA

Language

English

Data Type

Arab Theses

Record ID

BIM-605825