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All Journal Jurnal Fisika Unand GEA, Jurnal Pendidikan Geografi Journal of Geoscience, Engineering, Environment, and Technology Jurnal Geosains dan Teknologi Geodika: Jurnal Kajian Ilmu dan Pendidikan Geografi Journal of Earth and Marine Technology (JEMT) TeknoKreatif: Jurnal Pengabdian kepada Masyarakat GeoEco
Ongky Anggara
Teknik Geomatika, Institut Teknologi Sumatera
Humanities Civil Engineering, Building, Construction & Architecture Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Engineering Environmental Science Materials Science & Nanotechnology Physics Social Sciences Transportation Other

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Journal : Journal of Earth and Marine Technology (JEMT)

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Present-day Crustal Deformation in West Sumatra After Series of Sumatran Great Earthquake from 2004-2010 Satrio Muhammad Alif; Jenny Melynda Siagian; Ongky Anggara
Journal of Earth and Marine Technology (JEMT) Vol 3, No 2 (2023)
Publisher : Lembaga Penelititan dan Pengabdian kepada Masyarakat - Institut Teknologi Adhi Tama Suraba

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31284/j.jemt.2023.v3i2.3733

Abstract

Present-day crustal deformation was an attempt to estimate earthquake potential, yet the presence of postseismic deformation should be carefully identified. Studying crustal deformation in West Sumatra has been important for this purpose since the series of Sumatran Great Earthquake from 2004-2010. This study utilized present-day GNSS data (2017-2021) and pre-2004 GNSS velocities to understand the present-day crustal deformation. Bernese 5.2 was used to process the GNSS data and linear regression was used to calculate present-day velocities. These velocities were transformed into an ITRF2000-based Sundaland plate reference frame and then the velocities were compared to pre-2004 velocities in the same reference frame. The present-day velocities were ranging from 28.4 mm/yr to 58.3 mm/yr in ITRF2014 and from 8.8 to 44.8 mm/yr in the Sundaland plate reference frame. This suggests West Sumatra was located on the Sumatra block of the Sundaland plate. The low velocity difference ( 11.7 mm/yr) with the random vector direction between present-day velocities and pre-2004 velocities shows that there is no postseismic deformation affecting West Sumatra. This proposes the utilization of present-day velocities for earthquake potential estimation in West Sumatra.
Present-day Crustal Deformation in West Sumatra After Series of Sumatran Great Earthquake from 2004-2010 Alif, Satrio Muhammad; Ching, Kuo-En; Siagian, Jenny Melynda; Anggara, Ongky
Journal of Earth and Marine Technology (JEMT) Vol 3, No 2 (2023)
Publisher : Lembaga Penelititan dan Pengabdian kepada Masyarakat - Institut Teknologi Adhi Tama Suraba

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31284/j.jemt.2023.v3i2.3733

Abstract

Present-day crustal deformation was an attempt to estimate earthquake potential, yet the presence of postseismic deformation should be carefully identified. Studying crustal deformation in West Sumatra has been important for this purpose since the series of Sumatran Great Earthquake from 2004-2010. This study utilized present-day GNSS data (2017-2021) and pre-2004 GNSS velocities to understand the present-day crustal deformation. Bernese 5.2 was used to process the GNSS data and linear regression was used to calculate present-day velocities. These velocities were transformed into an ITRF2000-based Sundaland plate reference frame and then the velocities were compared to pre-2004 velocities in the same reference frame. The present-day velocities were ranging from 28.4 mm/yr to 58.3 mm/yr in ITRF2014 and from 8.8 to 44.8 mm/yr in the Sundaland plate reference frame. This suggests West Sumatra was located on the Sumatra block of the Sundaland plate. The low velocity difference ( 11.7 mm/yr) with the random vector direction between present-day velocities and pre-2004 velocities shows that there is no postseismic deformation affecting West Sumatra. This proposes the utilization of present-day velocities for earthquake potential estimation in West Sumatra.
Co-Authors Aditya Rizqiansyah Andhika Wahyu Pratama Annisa Permata Sari, Annisa Permata Azizah, Fadhillah Nur Ching, Kuo-En Een Lujainatul Isnaini Een Lujainatul Isnaini Jenny Melynda Siagian Julianto, Romi Krama, Agel Vidian Muhammad Ario Eko Rahadianto Muhammad Ario Eko Rahadianto Nadzir, Zulfikar Adlan Perdana, Redho Surya Putri Ferlia Cahyani Satrio Muhammad Alif Satrio Muhammad Alif Satrio Muhammad Alif Satrio Muhammad Alif Satrio Muhammad Alif Siagian, Jenny Melynda Siburian, Yesica Tumim Siregar, Ribhan Nafiz Vidiya Ristiana Welly, Tri Kies Wendi Melvin Hutabarat