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All Journal Journal of Degraded and Mining Lands Management Jurnal Fisika Unand GEA, Jurnal Pendidikan Geografi Geo-Image Journal Journal of Geoscience, Engineering, Environment, and Technology JLBG (Jurnal Lingkungan dan Bencana Geologi) (Journal of Environment and Geological Hazards) Journal of Science and Applicative Technology JRST (Jurnal Riset Sains dan Teknologi) Jurnal Geosains dan Teknologi Jurnal Tekno Global Jurnal Manajemen Transportasi & Logistik (JMTRANSLOG) Journal of Earth and Marine Technology (JEMT) Journal of Sciencce Technology and Visual Culture GeoEco Jurnal Geosaintek
Satrio Muhammad Alif
Department Of Geomatics Engineering, Institut Teknologi Sumatera, Lampung, Indonesia
Agriculture, Biological Sciences & Forestry Arts Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Materials Science & Nanotechnology Mechanical Engineering Physics Social Sciences Transportation Other

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Analisis Regangan di Selat Sunda berdasarkan Data GNSS Ongky Anggara; Satrio Muhammad Alif; Danda Selfa Januarta; Yoga Maulana
Jurnal Fisika Unand Vol 15 No 1 (2026)
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jfu.15.1.9-15.2026

Abstract

The Sunda Strait is a complex tectonic transition zone between Sumatra and Java, influenced by the interaction between the Indo-Australian and Sundaland plates. This study aims to analyze interseismic displacement patterns and strain accumulation using continuous Global Navigation Satellite System (GNSS) data observations spread across southern Sumatra, the Sunda Strait, and western Java. The analysis results show that GNSS stations along the west coast of Sumatra experience significant shifts to the northwest at varying speeds, reflecting the direct influence of subduction. Meanwhile, stations in the West Java region show a more uniform shift pattern to the southeast. In the Sunda Strait region, a complex displacement pattern is identified, influenced by a combination of tectonic cessation and volcanic activity, particularly around Mount Anak Krakatau. The results of strain accumulation amounted to ~50 nanostrains per year in the tectonically active region. These findings indicate that the Sunda Strait region has high tectonic activity potential and plays an important role in the release of seismic energy in the future. Therefore, continuous geodetic monitoring is essential to support the understanding of cooling processes and disaster mitigation efforts in this region.
COSEISMIC DEFORMATION OF THE 2020 BENGKULU MW 6.8 EARTHQUAKE USING INSAR DATA Ongky Anggara; Satrio Muhammad Alif
GeoEco Vol 11, No 1 (2025): GeoEco January 2025
Publisher : Universitas Sebelas Maret (UNS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/ge.v11i1.90987

Abstract

An earthquake with a seismic moment magnitude of Mw 6.8 occurred in Bengkulu province, located on the southwestern coast of Sumatra, on August 18, 2020. This study aims to assess the application of the differential interferometric synthetic aperture radar (DInSAR) method to detect and analyze coseismic deformation due to this earthquake using the Sentinel-1A radar satellite. The results of the DInSAR did not yield significant coseismic signals with the range of Line of Sight (LOS) displacement of ~-40 mm to ~40 mm. The InSAR data did not detect clear deformation patterns or displacements associated with the August 18, 2020 earthquake. Further investigations are needed to understand the limitations of InSAR in detecting coseismic signals for this specific event. Integrating these datasets can provide a more comprehensive understanding of the earthquake source, fault characteristics, and associated deformation patterns.
RAPID MAGNITUDE ESTIMATION OF 2019 M6.9 BANTEN EARTHQUAKE USING GNSS 1HZ Ongky Anggara; Novia Rohmadona; Redho Surya Perdana; Satrio Muhammad Alif; Een Lujainatul Isnaini; Muhammad Al Kautsar
GeoEco Vol 12, No 2 (2026): GeoEco July 2026
Publisher : Universitas Sebelas Maret (UNS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/ge.v12i2.109235

Abstract

Rapid magnitude estimation remains challenging in Indonesia due to the limited evaluation of high-rate Global Navigation Satellite System (GNSS) data and the lack of region-specific validation of existing Peak Ground Displacement (PGD) scaling relations for earthquake early warning applications. This study investigates the performance of high-rate GNSS data (1 Hz) for rapid magnitude estimation of the August 2 2019, Banten earthquake (Mw 6.9). Using 15 InaCORS stations provided by the Geospatial Information Agency of Indonesia, the data were processed using Precise Point Positioning with Ambiguity Resolution (PPP-AR). PGD values were extracted and applied to three empirical scaling relations proposed by Melgar et al. (2015), Crowell et al. (2016), and Ruhl et al. (2019). This study presents a comparative evaluation of multiple PGD scaling models using real Indonesian GNSS data, providing insight into their performance in a tectonic setting that remains underrepresented in previous studies. The results show that all models successfully converged to Mw 6.9, with convergence times ranging from 20 to 160 seconds after the earthquake origin time. However, this study is limited by the analysis of a single earthquake event and the use of global scaling relations that are not specifically calibrated for Indonesian tectonic conditions. These findings demonstrate the potential of high-rate GNSS as a complementary tool to seismic sensors for rapid magnitude estimation. The integration of GNSS into the Indonesia Tsunami Early Warning System (InaTEWS) is therefore recommended to improve the reliability and timeliness of earthquake and tsunami early warning.
PERHITUNGAN GAYABERAT LAUT RESOLUSI TINGGI DI PERAIRAN SUMATERA DARI SATELIT ALTIMETRI Zulfikar Adlan Nadzir; Satrio Muhammad Alif; Anita Eka Jayanti
Jurnal Geosaintek Vol. 11 No. 3 (2025)
Publisher : Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j25023659.v11i3.8834

Abstract

Gayaberat dan anomalinya, sebagai parameter penting dari gaya di permukaan Bumi, merupakan hal yang erat kaitannya dengan Geoid. Geoid itu sendiri merupakan sebuah pilar dalam ilmu Geodesi dan fungsi utamanya adalah sebagai referensi vertikal di sebuah wilayah. Pengukuran gayaberat, khususnya di lautan, merupakan sebuah proses yang seringkali membutuhkan biaya yang tidak sedikit, selain itumemiliki ketelitian yang tidak cukup baikdibandingkan dengan pengukuran gayaberat di daratan. Di sisi lain, sejak tahun 1990 sebuah teknologi satelit yang disebutaltimetri berkembang dengan cukup pesat dan mampu menjadi salah satu sarana untuk mendapatkan nilai gayaberat di laut lepas. Salah satu dari satelit altimetri adalah Cryosat-2 yang memiliki beberapa jenis pengamatan (misi), salah satunya adalah misi geodetik yang melintasi Bumi dengan resolusi yang lebihbaik dibanding dengan misi lainnya. Indonesia sendiri sudah mengembangkan model gayaberat regional bernama INAGEOID2020 dengan 2 versi: v1.0 dan yang terbaru, v2.0. Model gayaberat ini masih bisa diperbaiki dan ditingkatkan sebagai bagian dari usaha untuk memenuhi syarat dari Kebijakan Satu Peta(KSP)sesuai amanat undang-undang. Salah satu lokasi penting dari Indonesia adalah pulau Sumatera, yang menjadi lokasi dari penelitian ini. Tujuan dari penelitian ini adalah untuk melakukan estimasi anomali gayaberat dari satelit Cryosat-2 dan memvalidasinya dengan data pembanding. Penelitian ini menggunakan data tinggi muka air laut (sea surface height–SSH) Cryosat-2 dengan pendekatan remove-compute-restore (RCR) untuk mendapatkan nilai anomali gayaberat, yang lalu dibandingkan dengan model global Sandwell v.31.1 dan beberapa data survey shipborne. Proses RCR ini mempermudah perhitungan secara inversi menuju anomali gayaberat, dengan hasil yang ada di rentang ± 200 mgal. Hasil dari penelitian ini menunjukkan bahwa hasil estimasi gayaberat dari Cryosat-2 di perairan Pulau Sumatera memiliki nilai Root Mean Square Error(RMSE)~11 mgal dibandingkan dengan model gayaberat global dan shipborne.Hal tersebut menunjukkan bahwa potensi untuk menggunakan data altimetri misi geodetik sebagai tambahan data masukan untuk pengembangan model geoid regional sebuah negara memiliki peluang yang baik. Selain itu, hasil anomali gayaberat dapat mengidentifikasi keberadaan sesar yang kemungkinan berpotensi menimbulkan gempa di perairan Sumatera.
Co-Authors Adam Irwansyah Fauzi Aditya Rizqiansyah Agung Pandi Nugroho Al Attar, Muhammad Nabil Andhika Wahyu Pratama Andri Hernandi Anisa Rahma Dhanty Anita Eka Jayanti Annisa Nurul Hidayah Arliandy Pratama Atmojo, Aulia Try Azizah, Fadhillah Nur Bambang Edhi Leksono Ching, Kuo-En Danda Selfa Januarta Een Lujainatul Isnaini Een Lujainatul Isnaini Een Lujainatul Isnaini Een Lujainatul Isnaini Erwin Yosua Fauzi, Adam Irwansyah Hutabarat, Wendi Melvin Isnaini, Een Lujainatul Jayanti, Anita Eka Jenny Melynda Siagian Lestari, Mardiana Tri M Rizky Mardiana Tri Lestari Muhamad Ilvan Ardiansyah Muhamad Sofyan Sauri Muhammad Al Kautsar Muhammad Ario Eko Rahadianto Muhammad Ario Eko Rahadianto Muhammad Fikri Muhammad Fikri Muhammad Ulin Nuha Nadzir, Zulfikar Adlan Nisya Kartika Novia Rohmadona Ongky Anggara Pangestika, Dita Mulia Perdana, Redho Surya Pratama, Agung Bhakti Pratama, Andhika Wahyu Pungkas Tri Hapsoro Putri Ferlia Cahyani Rahadianto, Muhammad Ario Eko Redho Surya Perdana Redho Surya Perdana Ruth Angelia Silaen Siagian, Jenny Melynda Siburian, Yesica Tumim Simarmata, Jelita Rizki Siregar, Ribhan Nafiz Sitinjak, Elysabet Sonya, Putri Suhadha, Argo Galih Vidiya Ristiana Wendi Melvin Hutabarat Yoga Maulana