Integration of Microtremor and PS-INSAR Analysis to Investigate the Susceptible Area in the Pronojiwo District (Indonesia) Following the 2021 East Java M6.1 Earthquake

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Published: 2024-07-05
DOI: https://doi.org/10.4401/ag-9094

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Harun Arrasyid
Department of Physics, Brawijaya University, Malang, 65145, Indonesia; Brawijaya Volcano and Geothermal Research Center, Brawijaya University, Malang, 65145, Indonesia
Suwarto
Department of Physics, Brawijaya University, Malang, 65145, Indonesia
Sukir Maryanto
a:1:{s:5:"en_US";s:46:"Dept. Of Physics, Brawijaya University, Malang";}
Sri Dwi Wuryani
Brawijaya Volcano and Geothermal Research Center, Brawijaya University, Malang, 65145, Indonesia
Didik R. Santoso
Department of Physics, Brawijaya University, Malang, 65145, Indonesia
Aris Subagiyo
Urban & Regional Planning Program, Faculty of Engineering, Brawijaya University, Malang, 65145, Indonesia

Abstract




The East Java M = 6.1 Earthquake struck on April 10, 2021, at the bottom of the Indian Ocean, about 96 km south of Kepanjen District, Malang Regency, Indonesia. The neighbouring Pronojiwo District in Lumajang Regency suffered significant damages and loss of lives. The earthquake aftermath underscored the necessity of examining susceptibility factors in the Pronojiwo area for future mitigation efforts. This research focuses on assessing earthquake vulnerability in Pronojiwo District using two methodologies: microtremor analysis and PS-InSAR. Microtremor data were directly collected, while PS-InSAR data were acquired from the Sentinel-1 satellite and processed using the ranging from 0.579 × 10 to 24.840 × 10 s /cm, in Pronojiwo District, with notably higher values found in areas with Semeru deposits, characterized by soft sediments. PS-InSAR analysis indicates concentrated negative shifts in residential zones, signaling structural damage. Regions with elevated vulnerability index values and negative PS points are considered more prone to earthquakes and subsequent building damages.




Article Details

Issue

Vol. 67 No. 2 (2024)

Section

Seismology
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How to Cite

(1)
Arrasyid, H. .; Suwarto; Maryanto, S.; Wuryani, S. D. .; Santoso, D. R. .; Subagiyo, A. . Integration of Microtremor and PS-INSAR Analysis to Investigate the Susceptible Area in the Pronojiwo District (Indonesia) Following the 2021 East Java M6.1 Earthquake. Ann. Geophys. 2024, 67 (2), SE216. https://doi.org/10.4401/ag-9094.