Surface rupture and distributed deformation revealed by optical satellite imagery: The intraplate 2016 Mw 6.0 Petermann Ranges earthquake, Australia
Geophysical Research Letters
Geoscience Australia, Symonston, ACT, Australia; University of Iowa, Iowa City, IA, USA; University of Melbourne, Melbourne, Australia
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Abstract
High-resolution optical satellite imagery is used to quantify vertical surface deformation associated with the intraplate 20 May 2016 Mw 6.0 Petermann Ranges earthquake, Northern Territory, Australia. The 21 ╓ 1 km long NW-trending rupture resulted from reverse motion on a northeast-dipping fault. Vertical surface offsets of up to 0.7 ╓ 0.1 m distributed across a 0.5-to-1 km wide deformation zone are measured using the Iterative Closest Point (ICP) algorithm to compare pre- and post-earthquake digital elevation models (DEMs) derived from Worldview imagery. The results are validated by comparison with field-based observations and interferometric synthetic aperture radar (InSAR). The pattern of surface uplift is consistent with distributed shear above the propagating tip of a reverse fault, leading to both an emergent fault and folding proximal to the rupture. This study demonstrates the potential for quantifying modest (<1 m) vertical deformation on a reverse fault using optical satellite imagery.
Study Area
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | Surface rupture and distributed deformation revealed by optical satellite imagery: The intraplate 2016 Mw 6.0 Petermann Ranges earthquake, Australia |
| Series title | Geophysical Research Letters |
| DOI | 10.1029/2019GL084926 |
| Volume | 46 |
| Issue | 17-18 |
| Year Published | 2019 |
| Language | English |
| Publisher | AGU |
| Contributing office(s) | Geologic Hazards Science Center |
| Description | 10 p. |
| First page | 10394 |
| Last page | 10403 |
| Country | Australia |
| Google Analytic Metrics | Metrics page |