Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/151062
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dc.contributor.authorLuo, Hengen_US
dc.contributor.authorWang, Tengen_US
dc.contributor.authorWei, Shengjien_US
dc.contributor.authorLiao, Mingshengen_US
dc.contributor.authorGong, Jianyaen_US
dc.date.accessioned2021-06-25T09:26:28Z-
dc.date.available2021-06-25T09:26:28Z-
dc.date.issued2021-
dc.identifier.citationLuo, H., Wang, T., Wei, S., Liao, M. & Gong, J. (2021). Deriving centimeter-level coseismic deformation and fault geometries of small-to-moderate earthquakes from time-series Sentinel-1 SAR images. Frontiers in Earth Science, 9, 636398-. https://dx.doi.org/10.3389/feart.2021.636398en_US
dc.identifier.issn2296-6463en_US
dc.identifier.urihttps://hdl.handle.net/10356/151062-
dc.description.abstractSmall-to-moderate earthquakes (e.g. ≤Mw5.5) occur much more frequently than large ones (e.g. >Mw6.0), yet are difficult to study with InSAR due to their weak surface deformation that are severely contaminated by atmospheric delays. Here we propose a stacking method using time-series SAR images that can effectively suppress atmospheric phase screens and extract weak coseismic deformation in centimeter to sub-centimeter level. Using this method, we successfully derive coseismic surface deformations for three small-to-moderate (Mw∼5) earthquakes in Tibet Plateau and Tienshan region from time-series Sentinel-1 SAR images, with peak line-of-sight deformation ranging from 5–6 mm to 13 mm. We also propose a strategy to downsample interferograms with weak deformation signal based on quadtree mesh obtained from preliminary slip model. With the downsampled datasets, we invert for the centroid locations, fault geometries and slips of these events. Our results demonstrate the potential of using time-series InSAR images to enrich earthquake catalog with geodetic observations for further study of earthquake cycle and active tectonics.en_US
dc.description.sponsorshipNanyang Technological Universityen_US
dc.language.isoenen_US
dc.relation04MNS001909A620en_US
dc.relation.ispartofFrontiers in Earth Scienceen_US
dc.rights© 2021 Luo, Wang, Wei, Liao and Gong. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.en_US
dc.subjectEngineering::Environmental engineeringen_US
dc.titleDeriving centimeter-level coseismic deformation and fault geometries of small-to-moderate earthquakes from time-series Sentinel-1 SAR imagesen_US
dc.typeJournal Articleen
dc.contributor.schoolAsian School of the Environmenten_US
dc.contributor.researchEarth Observatory of Singaporeen_US
dc.identifier.doi10.3389/feart.2021.636398-
dc.description.versionPublished versionen_US
dc.identifier.scopus2-s2.0-85102011653-
dc.identifier.volume9en_US
dc.identifier.spage636398en_US
dc.subject.keywordsCentimeter-level Coseismic Deformationen_US
dc.subject.keywordsStackingen_US
dc.description.acknowledgementThis work was supported by the National Key Research and Development Program of China (Grant No. 2019YFC1509201) and the National Science Foundation of China (NSFC Grant Nos. U1939202 and 41974017). Shengji Wei is partially supported by Earth Observatory of Singapore grant 04MNS001909A620.en_US
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