Abstract
Analysis and modeling of InSAR data covering the 2008 Reno-Mogul M 4.7 earthquake swarm indicate that the main event was produced by slip on a previously unrecognized strike-slip fault in the Reno basin. Deformation of 0.5-2.5 cm in radar line-of-sight was produced by the main event and post-seismic slip over an area of more than ∼150 km 2. This earthquake is one of the smallest magnitude events modeled with InSAR to date in the seismically active western Basin and Range, and it provides new insights into regional neotectonic relations. Inverse modeling of the InSAR data suggests that the earthquake swarm was generated by 25-75 cm of dextral displacement on a N44Wstriking fault with a ∼3 km rupture length and a rupture depth of ∼2 km. The InSAR-detected strike-slip ground deformation is unique for the Reno basin which is in the purely extensional domain of the Sierra Nevada-Basin and Range Transition Zone, an area dominated by north-striking normal faults. The InSAR modeling of the 2008 earthquake swarm supports the concept of westward migration of Walker Lane transcurrent faulting and overprinting of extensional Basin and Range structures, in this case the westward migration of dextral shear associated with the northern Walker Lane into the extension-dominated Reno basin.
| Original language | English (US) |
|---|---|
| Article number | L18306 |
| Journal | Geophysical Research Letters |
| Volume | 39 |
| Issue number | 17 |
| DOIs | |
| State | Published - 2012 |
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ASJC Scopus subject areas
- Earth and Planetary Sciences(all)
- Geophysics
Cite this
InSAR analysis of the 2008 Reno-Mogul earthquake swarm : Evidence for westward migration of Walker Lane style dextral faulting. / Bell, John W.; Amelung, Falk C; Henry, Christopher D.
In: Geophysical Research Letters, Vol. 39, No. 17, L18306, 2012.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - InSAR analysis of the 2008 Reno-Mogul earthquake swarm
T2 - Evidence for westward migration of Walker Lane style dextral faulting
AU - Bell, John W.
AU - Amelung, Falk C
AU - Henry, Christopher D.
PY - 2012
Y1 - 2012
N2 - Analysis and modeling of InSAR data covering the 2008 Reno-Mogul M 4.7 earthquake swarm indicate that the main event was produced by slip on a previously unrecognized strike-slip fault in the Reno basin. Deformation of 0.5-2.5 cm in radar line-of-sight was produced by the main event and post-seismic slip over an area of more than ∼150 km 2. This earthquake is one of the smallest magnitude events modeled with InSAR to date in the seismically active western Basin and Range, and it provides new insights into regional neotectonic relations. Inverse modeling of the InSAR data suggests that the earthquake swarm was generated by 25-75 cm of dextral displacement on a N44Wstriking fault with a ∼3 km rupture length and a rupture depth of ∼2 km. The InSAR-detected strike-slip ground deformation is unique for the Reno basin which is in the purely extensional domain of the Sierra Nevada-Basin and Range Transition Zone, an area dominated by north-striking normal faults. The InSAR modeling of the 2008 earthquake swarm supports the concept of westward migration of Walker Lane transcurrent faulting and overprinting of extensional Basin and Range structures, in this case the westward migration of dextral shear associated with the northern Walker Lane into the extension-dominated Reno basin.
AB - Analysis and modeling of InSAR data covering the 2008 Reno-Mogul M 4.7 earthquake swarm indicate that the main event was produced by slip on a previously unrecognized strike-slip fault in the Reno basin. Deformation of 0.5-2.5 cm in radar line-of-sight was produced by the main event and post-seismic slip over an area of more than ∼150 km 2. This earthquake is one of the smallest magnitude events modeled with InSAR to date in the seismically active western Basin and Range, and it provides new insights into regional neotectonic relations. Inverse modeling of the InSAR data suggests that the earthquake swarm was generated by 25-75 cm of dextral displacement on a N44Wstriking fault with a ∼3 km rupture length and a rupture depth of ∼2 km. The InSAR-detected strike-slip ground deformation is unique for the Reno basin which is in the purely extensional domain of the Sierra Nevada-Basin and Range Transition Zone, an area dominated by north-striking normal faults. The InSAR modeling of the 2008 earthquake swarm supports the concept of westward migration of Walker Lane transcurrent faulting and overprinting of extensional Basin and Range structures, in this case the westward migration of dextral shear associated with the northern Walker Lane into the extension-dominated Reno basin.
UR - http://www.scopus.com/inward/record.url?scp=84867213676&partnerID=8YFLogxK
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U2 - 10.1029/2012GL052795
DO - 10.1029/2012GL052795
M3 - Article
AN - SCOPUS:84867213676
VL - 39
JO - Geophysical Research Letters
JF - Geophysical Research Letters
SN - 0094-8276
IS - 17
M1 - L18306
ER -