Coseismic and postseismic deformation due to the 2007 M5.5 Ghazaband fault earthquake, Balochistan, Pakistan

H. Fattahi, Falk C Amelung, E. Chaussard, Shimon Wdowinski

Research output: Contribution to journalArticle

14 Citations (Scopus)

Abstract

Time series analysis of interferometric synthetic aperture radar data reveals coseismic and postseismic surface displacements associated with the 2007 M5.5 earthquake along the southern Ghazaband fault, a major but little studied fault in Pakistan. Modeling indicates that the coseismic surface deformation was caused by ∼9cm of strike-slip displacement along a shallow subvertical fault. The earthquake was followed by at least 1year of afterslip, releasing ∼70% of the moment of the main event, equivalent to a M5.4 earthquake. This high aseismic relative to the seismic moment release is consistent with previous observations for moderate earthquakes (M<6) and suggests that smaller earthquakes are associated with a higher aseismic relative to seismic moment release than larger earthquakes. Key Points Seismic and aseismic slips on the southern end of the Ghazaband fault At least 1 year of afterslip with 70% of the coseismic moment release Smaller earthquakes have a higher aseismic relative to seismic moment release

Original languageEnglish (US)
Pages (from-to)3305-3312
Number of pages8
JournalGeophysical Research Letters
Volume42
Issue number9
DOIs
StatePublished - May 16 2015

Fingerprint

Pakistan
earthquakes
earthquake
moments
seismic moment
slip
time series analysis
radar data
releasing
synthetic aperture radar

Keywords

  • coseismic
  • earthquake
  • Ghazaband fault
  • InSAR
  • postseismic

ASJC Scopus subject areas

  • Earth and Planetary Sciences(all)
  • Geophysics

Cite this

Coseismic and postseismic deformation due to the 2007 M5.5 Ghazaband fault earthquake, Balochistan, Pakistan. / Fattahi, H.; Amelung, Falk C; Chaussard, E.; Wdowinski, Shimon.

In: Geophysical Research Letters, Vol. 42, No. 9, 16.05.2015, p. 3305-3312.

Research output: Contribution to journalArticle

@article{a877070802f940f3aa4159e28a4c7851,
title = "Coseismic and postseismic deformation due to the 2007 M5.5 Ghazaband fault earthquake, Balochistan, Pakistan",
abstract = "Time series analysis of interferometric synthetic aperture radar data reveals coseismic and postseismic surface displacements associated with the 2007 M5.5 earthquake along the southern Ghazaband fault, a major but little studied fault in Pakistan. Modeling indicates that the coseismic surface deformation was caused by ∼9cm of strike-slip displacement along a shallow subvertical fault. The earthquake was followed by at least 1year of afterslip, releasing ∼70{\%} of the moment of the main event, equivalent to a M5.4 earthquake. This high aseismic relative to the seismic moment release is consistent with previous observations for moderate earthquakes (M<6) and suggests that smaller earthquakes are associated with a higher aseismic relative to seismic moment release than larger earthquakes. Key Points Seismic and aseismic slips on the southern end of the Ghazaband fault At least 1 year of afterslip with 70{\%} of the coseismic moment release Smaller earthquakes have a higher aseismic relative to seismic moment release",
keywords = "coseismic, earthquake, Ghazaband fault, InSAR, postseismic",
author = "H. Fattahi and Amelung, {Falk C} and E. Chaussard and Shimon Wdowinski",
year = "2015",
month = "5",
day = "16",
doi = "10.1002/2015GL063686",
language = "English (US)",
volume = "42",
pages = "3305--3312",
journal = "Geophysical Research Letters",
issn = "0094-8276",
publisher = "American Geophysical Union",
number = "9",

}

TY - JOUR

T1 - Coseismic and postseismic deformation due to the 2007 M5.5 Ghazaband fault earthquake, Balochistan, Pakistan

AU - Fattahi, H.

AU - Amelung, Falk C

AU - Chaussard, E.

AU - Wdowinski, Shimon

PY - 2015/5/16

Y1 - 2015/5/16

N2 - Time series analysis of interferometric synthetic aperture radar data reveals coseismic and postseismic surface displacements associated with the 2007 M5.5 earthquake along the southern Ghazaband fault, a major but little studied fault in Pakistan. Modeling indicates that the coseismic surface deformation was caused by ∼9cm of strike-slip displacement along a shallow subvertical fault. The earthquake was followed by at least 1year of afterslip, releasing ∼70% of the moment of the main event, equivalent to a M5.4 earthquake. This high aseismic relative to the seismic moment release is consistent with previous observations for moderate earthquakes (M<6) and suggests that smaller earthquakes are associated with a higher aseismic relative to seismic moment release than larger earthquakes. Key Points Seismic and aseismic slips on the southern end of the Ghazaband fault At least 1 year of afterslip with 70% of the coseismic moment release Smaller earthquakes have a higher aseismic relative to seismic moment release

AB - Time series analysis of interferometric synthetic aperture radar data reveals coseismic and postseismic surface displacements associated with the 2007 M5.5 earthquake along the southern Ghazaband fault, a major but little studied fault in Pakistan. Modeling indicates that the coseismic surface deformation was caused by ∼9cm of strike-slip displacement along a shallow subvertical fault. The earthquake was followed by at least 1year of afterslip, releasing ∼70% of the moment of the main event, equivalent to a M5.4 earthquake. This high aseismic relative to the seismic moment release is consistent with previous observations for moderate earthquakes (M<6) and suggests that smaller earthquakes are associated with a higher aseismic relative to seismic moment release than larger earthquakes. Key Points Seismic and aseismic slips on the southern end of the Ghazaband fault At least 1 year of afterslip with 70% of the coseismic moment release Smaller earthquakes have a higher aseismic relative to seismic moment release

KW - coseismic

KW - earthquake

KW - Ghazaband fault

KW - InSAR

KW - postseismic

UR - http://www.scopus.com/inward/record.url?scp=84930479557&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84930479557&partnerID=8YFLogxK

U2 - 10.1002/2015GL063686

DO - 10.1002/2015GL063686

M3 - Article

AN - SCOPUS:84930479557

VL - 42

SP - 3305

EP - 3312

JO - Geophysical Research Letters

JF - Geophysical Research Letters

SN - 0094-8276

IS - 9

ER -