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Title: A Comprehensive Earthquake Catalog for Iraq in Terms of Moment Magnitude

Abstract

A comprehensive earthquake catalog was compiled for Iraq and neighboring areas as part of a broader probabilistic seismic–hazard assessment project. The Iraq Seismic Network (ISN) was established in 1976 and became operational in the early 1980s. However, recording and reporting of seismic data has been intermittent in Iraq. Hence, events were collected from various sources, including the ISN when available, International Seismological Centre (ISC), European–Mediterranean Seismological Centre, U.S. Geological Survey Centennial Catalog, Global Centroid Moment Tensor solutions, and Ambraseys’ extensive work on cataloging of instrumental era earthquakes in the Middle East (e.g., Ambraseys, 1978, 2001, 2009). We supplement these with new direct moment magnitude calculations based on coda calibration technique. For many of the larger events in the catalog, more than one magnitude is available. Directly calculated moment magnitudes (M w) were favored, followed by body–wave magnitude (mb) obtained from the ISC. Where no directly calculated M w was available, other magnitude scales were converted to M w using relationships compatible with the local catalog. In conclusion, the resulting earthquake catalog spans from the year 1900 until the end of 2009, covers the region bounded by 26°–40° N latitudes and 36°–51° E longitudes, and includes more than 18,000 earthquakes, ofmore » which roughly 4000 are M w 4.0 or larger.« less

Authors:
 [1];  [2];  [3];  [4];  [5];  [4];  [6];  [7];  [8];  [6]
  1. Onur Seemann Consulting, Victoria, BC (Canada)
  2. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
  3. Univ. of Basrah, Basrah (Iraq)
  4. Univ. of Arkansas at Little Rock, Little Rock, AR (United States)
  5. Univ. of Duhok, Kurdistan Region (Iraq)
  6. Univ. of Baghdad, Al-Jadriya (Iraq)
  7. Univ. of Sumer, Thi Qar Governorate (Iraq)
  8. Univ. of Sulaimani, Kurdistan Region (Iraq)
Publication Date:
Research Org.:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA)
OSTI Identifier:
1466119
Report Number(s):
LLNL-JRNL-682738
Journal ID: ISSN 0895-0695; 807454
Grant/Contract Number:  
AC52-07NA27344
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Seismological Research Letters
Additional Journal Information:
Journal Volume: 88; Journal Issue: 3; Journal ID: ISSN 0895-0695
Publisher:
Seismological Society of America
Country of Publication:
United States
Language:
English
Subject:
58 GEOSCIENCES

Citation Formats

Onur, Tuna, Gök, Rengin, Abdulnaby, Wathiq, Mahdi, Hanan, Numan, Nazar M. S., Al‐Shukri, Haydar, Shakir, Ammar M., Chlaib, Hussein K., Ameen, Taher H., and Abd, Najah A. A Comprehensive Earthquake Catalog for Iraq in Terms of Moment Magnitude. United States: N. p., 2017. Web. doi:10.1785/0220160078.
Onur, Tuna, Gök, Rengin, Abdulnaby, Wathiq, Mahdi, Hanan, Numan, Nazar M. S., Al‐Shukri, Haydar, Shakir, Ammar M., Chlaib, Hussein K., Ameen, Taher H., & Abd, Najah A. A Comprehensive Earthquake Catalog for Iraq in Terms of Moment Magnitude. United States. doi:10.1785/0220160078.
Onur, Tuna, Gök, Rengin, Abdulnaby, Wathiq, Mahdi, Hanan, Numan, Nazar M. S., Al‐Shukri, Haydar, Shakir, Ammar M., Chlaib, Hussein K., Ameen, Taher H., and Abd, Najah A. Wed . "A Comprehensive Earthquake Catalog for Iraq in Terms of Moment Magnitude". United States. doi:10.1785/0220160078. https://www.osti.gov/servlets/purl/1466119.
@article{osti_1466119,
title = {A Comprehensive Earthquake Catalog for Iraq in Terms of Moment Magnitude},
author = {Onur, Tuna and Gök, Rengin and Abdulnaby, Wathiq and Mahdi, Hanan and Numan, Nazar M. S. and Al‐Shukri, Haydar and Shakir, Ammar M. and Chlaib, Hussein K. and Ameen, Taher H. and Abd, Najah A.},
abstractNote = {A comprehensive earthquake catalog was compiled for Iraq and neighboring areas as part of a broader probabilistic seismic–hazard assessment project. The Iraq Seismic Network (ISN) was established in 1976 and became operational in the early 1980s. However, recording and reporting of seismic data has been intermittent in Iraq. Hence, events were collected from various sources, including the ISN when available, International Seismological Centre (ISC), European–Mediterranean Seismological Centre, U.S. Geological Survey Centennial Catalog, Global Centroid Moment Tensor solutions, and Ambraseys’ extensive work on cataloging of instrumental era earthquakes in the Middle East (e.g., Ambraseys, 1978, 2001, 2009). We supplement these with new direct moment magnitude calculations based on coda calibration technique. For many of the larger events in the catalog, more than one magnitude is available. Directly calculated moment magnitudes (Mw) were favored, followed by body–wave magnitude (mb) obtained from the ISC. Where no directly calculated Mw was available, other magnitude scales were converted to Mw using relationships compatible with the local catalog. In conclusion, the resulting earthquake catalog spans from the year 1900 until the end of 2009, covers the region bounded by 26°–40° N latitudes and 36°–51° E longitudes, and includes more than 18,000 earthquakes, of which roughly 4000 are Mw 4.0 or larger.},
doi = {10.1785/0220160078},
journal = {Seismological Research Letters},
issn = {0895-0695},
number = 3,
volume = 88,
place = {United States},
year = {2017},
month = {3}
}

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