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 language | English (US) |
|---|---|
| Pages (from-to) | 3305-3312 |
| Number of pages | 8 |
| Journal | Geophysical Research Letters |
| Volume | 42 |
| Issue number | 9 |
| DOIs | |
| State | Published - May 16 2015 |
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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 journal › Article
}
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 -