Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/174579
Title: Space geodetic views on the 2021 central Greece earthquake sequence: 2D deformation maps decomposed from multi-track and multi-temporal sentinel-1 InSAR data
Authors: Li, Zhen
Xu, Shan-Shan
Ma, Zhangfeng
Keywords: Earth and Environmental Sciences
Issue Date: 2023
Source: Li, Z., Xu, S. & Ma, Z. (2023). Space geodetic views on the 2021 central Greece earthquake sequence: 2D deformation maps decomposed from multi-track and multi-temporal sentinel-1 InSAR data. IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 16, 2741-2752. https://dx.doi.org/10.1109/JSTARS.2023.3257234
Journal: IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing 
Abstract: Pioneering efforts well studied the deformation decomposition of single earthquake using a pair of ascending (ASC) and descending (DES) track interferometric synthetic aperture radar (InSAR) data. However, deformation decomposition of sequent events is rarely discussed and hard to implement. That's because it's hard to ensure deformations related to each earthquake can be recorded by a pair of ASC and DES track data. Three sequent earthquakes (Mw>5.5) just hit Central Greece in March 2021, and this earthquake sequence provides us with a perfect case to study 2-D (east-west and up-down) deformation decomposition when the mentioned premise cannot be satisfied. In this context, we proposed a Multi-track and Multi-temporal 2-D (MTMT2-D) method. Its novelty and behind rationale are to decompose 2-D deformations of each event through fusing multitrack and multitemporal interferograms. Based on the decomposed deformations, we invert the slip distribution of three earthquakes respectively. We found that the decomposed deformations can better constrain the fault geometry than the single InSAR interferogram. Furthermore, our geodetic inversion results also suggest a domino-like triggering rupture process for this earthquake sequence. It indicates that our MTMT2-D method can potentially reveal more details about earthquake sequence.
URI: https://hdl.handle.net/10356/174579
ISSN: 1939-1404
DOI: 10.1109/JSTARS.2023.3257234
Research Centres: Earth Observatory of Singapore 
Rights: © The Authors. This work is licensed under a Creative Commons Attribution 4.0 License. For more information, see https://creativecommons.org/licenses/by/4.0/
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:EOS Journal Articles

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