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@article{geoplanning69489, author = {Imanuela Pertiwi and Trismahargyono Trismahargyono and Marniati Marniati and Joshua Purba}, title = {Post-Seismic Surface Deformation of The Tarakan Earthquake in 2015 Using The DInSAR Technique}, journal = {Geoplanning: Journal of Geomatics and Planning}, volume = {12}, number = {1}, year = {2025}, keywords = {SAR imagery, DinsSAR, deformation, subsidence, uplift, fault}, abstract = {Deformation can help predict the presence and severity of an earthquake. SAR image data can be used to calculate post-seismic surface deformation using the InSAR and DInSAR methods. DInSAR (Differential Interferometric Synthetic Aperture Radar) is a well-established technology for monitoring subsidence and uplift with high millimeter precision. In this study, SAR imagery is used to detect surface deformation caused by an earthquake of magnitude M 6.1 on December 21, 2015, at 01:47:37 WIB in Tarakan Regency, North Borneo. The data used is Sentinel-1 satellite imagery data in single-look complex (SLC) format, which consists of a master picture acquired on December 18, 2015 (3 days before the major earthquake) and a slave image recorded on January 11, 2016 (21 days after the major earthquake). The interferogram created by the Tarakan earthquake on December 21, 2015, spun around the main earthquake in three directions: north-east, southeast-southwest, and southwest-northwest. Tarakan City, located south-southwest of the epicenter, saw the highest subsidence deformation of 0,001-0,035 meters. On December 21, 2015, the Tana Tidung I Regency area, 33 kilometers southwest of the Tarakan earthquake epicenter, saw the highest uplift deformation (0,019-0,079 meters). The largest uplift deformation in Tana Tidung II Regency (0,069 meters), where the Tarakan earthquake occurred, is 10 kilometers north of the epicenter. The surface deformation values due to the Tarakan earthquake provide information on the seismic hazard in the North Borneo and provide evidence of other locally active faults. The uplift deformation that occurred to the east of the epicentre and the subsidence deformation that occurred to the west of the epicentre represent that the fault characteristics that caused the Tarakan earthquake were oblique-normal faults with strike-slip fault movements dominating, and normal (downward) fault blocks located to the west.}, issn = {2355-6544}, doi = {10.14710/geoplanning.12.1.%p}, url = {https://ejournal.undip.ac.id/index.php/geoplanning/article/view/69489} }
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