New interpretation of the rupture process of the 2016 Taiwan Meinong Mw 6.4 earthquake based on the InSAR, 1-Hz GPS and strong motion data
Journal
Journal of Geodesy
Journal Volume
95
Journal Issue
11
Date Issued
2021
Author(s)
Abstract
A new interpretation of the 2016 Meinong earthquake is proposed based on the Synthetic Aperture Radar (SAR) satellites, high-rate GPS and strong motion data. The fault geometry is firstly estimated by the Interferometric Synthetic Aperture Radar (InSAR) surface deformation data. Then, the coseismic rupture process is inferred through the 1-Hz GPS and strong motion data based on the estimated fault geometry parameters. The InSAR-derived best-fitting fault geometry model suggests that the preferred fault strike and dip angles are 271.7° and 22.7°, respectively. The inferred fault rupture model indicates that the coseismic fault rupture is a mixed motion of thrust and left-strike slip with the maximum slip of ~ 1.0?m, and the high slip area is located at 9–16?km underground. The snapshots demonstrate that the coseismic fault rupture propagation is along the northwest direction, with the entire duration of ~ 16?s. Besides, the InSAR-derived faulting model reflects that the InSAR observation includes the deformation caused by aseismic slip and aftershock. However, the InSAR-derived fault geometry model can significantly contribute to the estimation of the rupture process based on the high-rate GPS and strong motion data. ? 2021, Springer-Verlag GmbH Germany, part of Springer Nature.
Subjects
1-HZ GPS
2016 Meinong earthquake
Fault geometry model
InSAR
Rupture process
Strong motion data
deformation mechanism
earthquake event
earthquake rupture
fault zone
GPS
satellite data
satellite imagery
strong motion
synthetic aperture radar
Kaohsiung
Meinong
Taiwan
Satellites
Type
journal article