Deterministic seismic hazard assessment close to a gas field in northern Oman

I. El-Hussain, A. Deif, A. M E Mohamed, K. Al-Jabri, B. Gareth, H. Yaqoup

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

The Northern Oman region has one of the most important on-land gas reservoirs in Oman, which has been exploited since 1979. Earthquakes with small magnitude and shallow depth that have been induced by gas exploitation were proved to cause light damage to structures on gas and gas fields in the region. Therefore, a long-term (unfortunately intermittent) monitoring program for the seismicity of this area was started in 1999 in order to contribute to the seismic risk reduction. The main aim of the current study is to conduct a deterministic seismic hazard assessment in order to provide the maximum ground-motion spectra at 12 selected sites inside the area of interest and to recommend the elastic design response spectra of any intended structures at each of the selected sites. The 5 % critical damping spectra were calculated at the median and 84th percentile levels. The site effect considered in all the used ground-motion prediction equations was evaluated based upon the value of the average shear-wave velocity in the upper most 30 m (VS30) at each of the selected 12 sites. Shear-wave velocity (Vs) was evaluated using the multichannel analysis of surface waves. The 12 sites were investigated with survey lines of 40 m length. 1-D and interpolated 2-D shear-wave velocity profiles have been generated up to a depth range of 25–40 m. The median PGA ranges from 54 cm/s2 at site no. 4 to 72 cm/s2 at site no. 9, which resulted from an earthquake with magnitude 3.6 at 4.45 and 2.92 km distance respectively from the interested sites. High frequency ground motions are found to be controlled by nearby seismic zones, whereas the low frequency ones are controlled by the distant western Makran large magnitude earthquakes. Finally, the hazard results were used to calculate the elastic design response spectra at each site of interest.

Original languageEnglish
Pages (from-to)4299-4316
Number of pages18
JournalArabian Journal of Geosciences
Volume8
Issue number7
DOIs
Publication statusPublished - Jul 2 2015

Fingerprint

hazard assessment
gas field
seismic hazard
ground motion
wave velocity
S-wave
earthquake
site effect
seismic zone
earthquake magnitude
velocity profile
gas
surface wave
damping
seismicity
hazard
damage
monitoring
prediction

Keywords

  • Deterministic seismic hazard
  • Induced seismicity
  • Oman

ASJC Scopus subject areas

  • Earth and Planetary Sciences(all)
  • Environmental Science(all)

Cite this

Deterministic seismic hazard assessment close to a gas field in northern Oman. / El-Hussain, I.; Deif, A.; Mohamed, A. M E; Al-Jabri, K.; Gareth, B.; Yaqoup, H.

In: Arabian Journal of Geosciences, Vol. 8, No. 7, 02.07.2015, p. 4299-4316.

Research output: Contribution to journalArticle

El-Hussain, I. ; Deif, A. ; Mohamed, A. M E ; Al-Jabri, K. ; Gareth, B. ; Yaqoup, H. / Deterministic seismic hazard assessment close to a gas field in northern Oman. In: Arabian Journal of Geosciences. 2015 ; Vol. 8, No. 7. pp. 4299-4316.
@article{4bffa1ec115347c7aa8c8b617f6b6614,
title = "Deterministic seismic hazard assessment close to a gas field in northern Oman",
abstract = "The Northern Oman region has one of the most important on-land gas reservoirs in Oman, which has been exploited since 1979. Earthquakes with small magnitude and shallow depth that have been induced by gas exploitation were proved to cause light damage to structures on gas and gas fields in the region. Therefore, a long-term (unfortunately intermittent) monitoring program for the seismicity of this area was started in 1999 in order to contribute to the seismic risk reduction. The main aim of the current study is to conduct a deterministic seismic hazard assessment in order to provide the maximum ground-motion spectra at 12 selected sites inside the area of interest and to recommend the elastic design response spectra of any intended structures at each of the selected sites. The 5 {\%} critical damping spectra were calculated at the median and 84th percentile levels. The site effect considered in all the used ground-motion prediction equations was evaluated based upon the value of the average shear-wave velocity in the upper most 30 m (VS30) at each of the selected 12 sites. Shear-wave velocity (Vs) was evaluated using the multichannel analysis of surface waves. The 12 sites were investigated with survey lines of 40 m length. 1-D and interpolated 2-D shear-wave velocity profiles have been generated up to a depth range of 25–40 m. The median PGA ranges from 54 cm/s2 at site no. 4 to 72 cm/s2 at site no. 9, which resulted from an earthquake with magnitude 3.6 at 4.45 and 2.92 km distance respectively from the interested sites. High frequency ground motions are found to be controlled by nearby seismic zones, whereas the low frequency ones are controlled by the distant western Makran large magnitude earthquakes. Finally, the hazard results were used to calculate the elastic design response spectra at each site of interest.",
keywords = "Deterministic seismic hazard, Induced seismicity, Oman",
author = "I. El-Hussain and A. Deif and Mohamed, {A. M E} and K. Al-Jabri and B. Gareth and H. Yaqoup",
year = "2015",
month = "7",
day = "2",
doi = "10.1007/s12517-014-1388-9",
language = "English",
volume = "8",
pages = "4299--4316",
journal = "Arabian Journal of Geosciences",
issn = "1866-7511",
publisher = "Springer Verlag",
number = "7",

}

TY - JOUR

T1 - Deterministic seismic hazard assessment close to a gas field in northern Oman

AU - El-Hussain, I.

AU - Deif, A.

AU - Mohamed, A. M E

AU - Al-Jabri, K.

AU - Gareth, B.

AU - Yaqoup, H.

PY - 2015/7/2

Y1 - 2015/7/2

N2 - The Northern Oman region has one of the most important on-land gas reservoirs in Oman, which has been exploited since 1979. Earthquakes with small magnitude and shallow depth that have been induced by gas exploitation were proved to cause light damage to structures on gas and gas fields in the region. Therefore, a long-term (unfortunately intermittent) monitoring program for the seismicity of this area was started in 1999 in order to contribute to the seismic risk reduction. The main aim of the current study is to conduct a deterministic seismic hazard assessment in order to provide the maximum ground-motion spectra at 12 selected sites inside the area of interest and to recommend the elastic design response spectra of any intended structures at each of the selected sites. The 5 % critical damping spectra were calculated at the median and 84th percentile levels. The site effect considered in all the used ground-motion prediction equations was evaluated based upon the value of the average shear-wave velocity in the upper most 30 m (VS30) at each of the selected 12 sites. Shear-wave velocity (Vs) was evaluated using the multichannel analysis of surface waves. The 12 sites were investigated with survey lines of 40 m length. 1-D and interpolated 2-D shear-wave velocity profiles have been generated up to a depth range of 25–40 m. The median PGA ranges from 54 cm/s2 at site no. 4 to 72 cm/s2 at site no. 9, which resulted from an earthquake with magnitude 3.6 at 4.45 and 2.92 km distance respectively from the interested sites. High frequency ground motions are found to be controlled by nearby seismic zones, whereas the low frequency ones are controlled by the distant western Makran large magnitude earthquakes. Finally, the hazard results were used to calculate the elastic design response spectra at each site of interest.

AB - The Northern Oman region has one of the most important on-land gas reservoirs in Oman, which has been exploited since 1979. Earthquakes with small magnitude and shallow depth that have been induced by gas exploitation were proved to cause light damage to structures on gas and gas fields in the region. Therefore, a long-term (unfortunately intermittent) monitoring program for the seismicity of this area was started in 1999 in order to contribute to the seismic risk reduction. The main aim of the current study is to conduct a deterministic seismic hazard assessment in order to provide the maximum ground-motion spectra at 12 selected sites inside the area of interest and to recommend the elastic design response spectra of any intended structures at each of the selected sites. The 5 % critical damping spectra were calculated at the median and 84th percentile levels. The site effect considered in all the used ground-motion prediction equations was evaluated based upon the value of the average shear-wave velocity in the upper most 30 m (VS30) at each of the selected 12 sites. Shear-wave velocity (Vs) was evaluated using the multichannel analysis of surface waves. The 12 sites were investigated with survey lines of 40 m length. 1-D and interpolated 2-D shear-wave velocity profiles have been generated up to a depth range of 25–40 m. The median PGA ranges from 54 cm/s2 at site no. 4 to 72 cm/s2 at site no. 9, which resulted from an earthquake with magnitude 3.6 at 4.45 and 2.92 km distance respectively from the interested sites. High frequency ground motions are found to be controlled by nearby seismic zones, whereas the low frequency ones are controlled by the distant western Makran large magnitude earthquakes. Finally, the hazard results were used to calculate the elastic design response spectra at each site of interest.

KW - Deterministic seismic hazard

KW - Induced seismicity

KW - Oman

UR - http://www.scopus.com/inward/record.url?scp=84933574150&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84933574150&partnerID=8YFLogxK

U2 - 10.1007/s12517-014-1388-9

DO - 10.1007/s12517-014-1388-9

M3 - Article

AN - SCOPUS:84933574150

VL - 8

SP - 4299

EP - 4316

JO - Arabian Journal of Geosciences

JF - Arabian Journal of Geosciences

SN - 1866-7511

IS - 7

ER -