Journal article
Surface Rupture and Distributed Deformation Revealed by Optical Satellite Imagery: The Intraplate 2016 Mw 6.0 Petermann Ranges Earthquake, Australia
RD Gold, D Clark, WD Barnhart, T King, M Quigley, RW Briggs
Geophysical Research Letters | AMER GEOPHYSICAL UNION | Published : 2019
DOI: 10.1029/2019GL084926
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 ± 0.1m distributed across a 0.5-to-1-km-wide deformation zone are measured using the Iterative Closest Point algorithm to compare preearthquake and postearthquake digital elevation models derived from WorldView imagery. The results are validated by comparison with field-based observations and interferometric synthetic aperture radar. The pattern of surface upli..
View full abstractGrants
Awarded by National Aeronautics and Space Administration
Funding Acknowledgements
Comments provided by S. DeLong, J. Hollingsworth, K. Mueller, C. Amos, an anonymous reviewer, and Editor Jeroen Ritsema improved this study. We acknowledge the (c) 2019 DigitalGlobe/NextView licensing agreement, through which we accessed the preearthquake and postearthquake World View imagery used in this study. Data used in this investigation, specifically the digital elevation models (DEMs), are freely available at https://doi.org/10.5066/P9353101.Satellite tasking requests were processed by the National Civilian Application Center Denver/Reston and U.S. Geological Survey (USGS) Earth Resources Observation and Science (EROS) Center. ALOS-2 images were provided under JAXA award 3123: Evaluating and utilizing ALOS-2 InSAR products for international earthquake response at the USGS National Earthquake Information Center. Copernicus Sentinel data 2014-2017 retrieved from the ASF DAAC, last accessed August 2017. The USGS Earthquake Hazards Program supported this work. W. D. B. was supported by NASA ESI Award NNX16AK81G and the highperformance computational resources provided by the University of Iowa. M. Q. and T. K. thank the Australian Research Council for funding their involvement in this research under Discovery Project DP170103350. Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government. Clark publishes with the permission of the Chief Executive Officer of Geoscience Australia.