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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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Assessing land subsidence from anthropogenic activity in Northern Sumatra, Indonesia revealed using SAR interferometry Perdana, Redho Surya; Anggara, Ongky; Suhadha, Argo Galih; Pangestika, Dita Mulia; Atmojo, Aulia Try; Al Attar, Muhammad Nabil; Sonya, Putri; Alif, Satrio Muhammad
Journal of Degraded and Mining Lands Management Vol. 12 No. 2 (2025)
Publisher : Brawijaya University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15243/jdmlm.2025.122.7235

Abstract

Land subsidence is a significant issue in urban areas globally, including several cities with a growing population in Northern Sumatra, Indonesia. This study employs Sentinel-1 SAR data and the Small Baseline Subset (SBAS) InSAR technique to monitor land subsidence in Medan, Deli Serdang, Dumai, North Aceh, and Lhokseumawe from 2015 to 2023. The SBAS algorithm was implemented in LiCSBAS with an unwrapped interferogram. Then corrected for atmospheric effects using GACOS, was employed to increase the results of the land subsidence. The analysis was enhanced using GRACE satellite data to assess the impact of groundwater depletion on subsidence. Results indicate significant subsidence across all study regions, particularly in Medan and Dumai, with rates ranging from -48.6 mm/year to +54.1 mm/year. The findings highlight the critical role of rapid urbanization, excessive groundwater extraction, and oil and gas exploration in driving subsidence. This study underscores the need for sustainable urban planning and aquifer management to mitigate future environmental and infrastructural risks.
Estimasi Slip Rate di Sesar Semangko menggunakan ALOS PALSAR 1 Anggara, Ongky; Alif, Satrio Muhammad; Simarmata, Jelita Rizki; Sitinjak, Elysabet
Jurnal Geosains dan Teknologi Vol 7, No 1 (2024): April 2024
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jgt.7.1.2024.1-8

Abstract

Provinsi Lampung merupakan salah satu pulau yang memiliki potensi bencana gempa bumi di masa mendatang dikarenakan berada dalam jalur sesar Sumatera yaitu Sesar Semangko.  Potensi gempa bumi di zona sesar Semangko dapat diestimasi dengan menghitung slip rate sesar Semangko. Penelitian ini bertujuan untuk mengestimasi slip rate sesar Semangko menggunakan data Advanced Land Observing Satellite (ALOS) Phased Array L-band SAR (PALSAR 1) dengan rentang data 2007 hingga 2010. Data InSAR diestimasi menggunakan metode the small baseline subset (SBAS) InSAR time-series technique dengan menggunakan koreksi velocity dari stasiun GNSS. Hasil LOS velocity InSAR terkoreksi dengan velocity stasiun GNSS sebesar 2,97 mm/tahun sampai dengan 8,67 mm/tahun. Hasil estimasi slip rate sesar Semangko menggunakan ALOS PALSAR 1 sebesar 11,40 mm/tahun.
Uji Signifikansi Stasiun GPS Kontinu dan Periodik dalam Identifikasi Pergerakan Koseismik Anggara, Ongky; Alif, Satrio Muhammad; Pratama, Andhika Wahyu; Hutabarat, Wendi Melvin
Jurnal Fisika Unand Vol 13 No 1 (2024)
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jfu.13.1.89-95.2024

Abstract

Pengukuran pergerakan bumi dengan menggunakan sistem GPS telah menjadi bagian penting dalam pemahaman deformasi kerak bumi yang berkaitan dengan aktivitas seismik. Dalam penelitian ini dilakukan uji   signifikansi dari stasiun GPS yang beroperasi secara kontinu dan periodik dalam mengidentifikasi pergerakan koseismik gempa Pesisir Barat pada 10 Maret 2020 (M5,8)   dan gempa Bengkulu pada 19 Agustus 2020 (M6,8). Pengolahan data GPS menggunakan perangkat lunak GAMIT/GLOBK yang bertujuan   untuk mendapatkan koordinat dan nilai pergeseran koseismik. Hasil penelitian menunjukan bahwa rata-rata titik tidak menunjukan pergeseran secara signifikan baik dari data GPS kontinu maupun data GPS periodik. Terdapat satu titik pengamatan yang menunjukkan   pergeseran secara signifikan yaitu stasiun pengamatan PRKB yang menunjukkan   pergeseran sebesar ~2-3 mm. Uji signifikansi dipengaruhi oleh nilai pergeseran koseismik dan standar deviasinya yang dipengaruhi mekanisme gempa. Uji signifikansi dari pengamatan stasiun GPS menunjukkan   tidak terdapat perbedaan baik dari data GPS secara kontinu maupun GPS secara periodik pada uji signifikansi karena   gempa yang diamati relatif kecil sehingga menghasilkan pergeseran koseismik yang relatif kecil.
Analisis Deformasi di Lampung dan Selat Sunda Berdasarkan Data GNSS tahun 2018 hingga 2021 Anggara, Ongky; Rahadianto, Muhammad Ario Eko; Alif, Satrio Muhammad; Isnaini, Een Lujainatul
Jurnal Fisika Unand Vol 13 No 5 (2024)
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jfu.13.5.637-643.2024

Abstract

The Lampung Province and Sunda Strait have a seismic gap zone with the potential for major earthquakes in the future. This study analyzes the deformation occurring in this region using continuous Global Navigation Satellite System (GNSS) station data from Indonesia Continuously Operating Reference Station (InaCORS) and Sumatran GPS Array (SuGAr) from 2018 to 2021.5. The GNSS data was processed using the Bernese 5.2 scientific software, applying least squares for velocity changes and statistical tests to analyze significance. The data processing was carried out in two schemes: the first scheme covering 2018-2020, and the second covering 2019-2021. The results of the deformation analysis from 2018 to 2021, using two continuous GNSS data processing schemes, showed velocity changes relative to the Sundaland Plate ranging from ~2 mm/year to ~20 mm/year. In the eastern region of the Sumatra fault, the velocity changes were smaller, around ~5 mm/year, due to the minimal influence of tectonic activity. However, in the Sunda Strait region, the deformation was influenced by volcanic activity. The deformation occurring in Lampung Province and the Sunda Strait, based on GNSS velocity changes, significantly contributes to tectonic and volcanic activities.
PERHITUNGAN GAYABERAT LAUT RESOLUSI TINGGI DI PERAIRAN SUMATERA DARI SATELIT ALTIMETRI Nadzir, Zulfikar Adlan; Alif, Satrio Muhammad; Jayanti, Anita Eka
Jurnal Geosaintek Vol. 11 No. 3 (2025)
Publisher : Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar

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 itu sendiri, khususnya di lautan, merupakan sebuah proses yang seringkali membutuhkan biaya yang tidak sedikit, juga memiliki ketelitian yang tidak cukup baik. Di sisi lain, sejak tahun 1990 sebuah teknologi bernama altimetri 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 misi, salah satunya adalah misi geodetik yang mellintasi Bumi dengan resolusi yang sangat baik 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 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 (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 enomali 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 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.
Analisis Regangan di Selat Sunda berdasarkan Data GNSS Anggara, Ongky; Alif, Satrio Muhammad; Januarta, Danda Selfa; Maulana, Yoga
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.
USING OF N-DIMENSIONAL EUCLIDEAN DISTANCE TO DETERMINE LOCATION WITH LACK OF HOSPITAL WITH HEALTH SOCIAL SECURITY AGENCY SERVICE Alif, Satrio Muhammad; Lestari, Mardiana Tri
GeoEco Vol 8, No 2 (2022): GeoEco July 2022
Publisher : Universitas Sebelas Maret (UNS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/ge.v8i2.54577

Abstract

Health Social Security Agency or Badan Penyelenggara Jaminan Sosial Kesehatan (BPJSK) is a health to make people pays inexpensive price to get medical treatment. One of the shortcomings of BPJSK is regency of BPJSK card owner must be identical with the regency of target hospital. Lampung Province has varying location and uneven distribution of hospitals especially in regencies. This study aims to determine location with lack of hospital with BPJSK by using of n-dimensional Euclidean distance. The three-dimensional coordinate of 2098 sample points (SP) and 77 hospitals are the quantitative parameter used to calculate the distance. Every hospital and SP are assigned an identity number depending on the regency of each hospital and SP. Each SP pairs with its closest hospital. The SP with different identity is grouped. 32.1% of area of Lampung Province is the location with lack of hospital with BPJSK. The most prioritized regencies is Pringsewu Regency based on the distance and the population. Further research about spatial analyzing the exact location to build hospital with BPJSK service should be conducted.
COSEISMIC DEFORMATION OF THE 2020 BENGKULU MW 6.8 EARTHQUAKE USING INSAR DATA Anggara, Ongky; Alif, Satrio Muhammad
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.
DETERMINING THE LOCATION OF LAND SUBSIDENCE OBSERVATION POINTS BASED ON LITHOLOGICAL DATA AND LAND COVER CHANGES IN LAMPUNG PROVINCE Perdana, Redho Surya; Fikri, Muhammad; Alif, Satrio Muhammad; Isnaini, Een Lujainatul; Fauzi, Adam Irwansyah
GeoEco Vol 8, No 2 (2022): GeoEco July 2022
Publisher : Universitas Sebelas Maret (UNS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/ge.v8i2.50412

Abstract

Land subsidence is a phenomenon that always occurs due to natural factors as well as human actions. Land subsidence has an even impact on all fronts. Land subsidence occurs continuously, therefore it is necessary to observe the phenomenon of land subsidence periodically using the GNSS method, which requires a benchmark that serves as a reference point for observation. With the need for a new benchmark devoted to observing land subsidence, it is necessary to do spatial modeling which is useful for finding out the suitability of the location where the subsidence observation point will be made. Spatial modeling was carried out using land cover data and lithology type to then be given weight and score and determined the soil movement vulnerability class into three, namely low class, medium class, and high class. The results of the spatial modeling of subsidence vulnerability show that the area12292.60 square kilometers is low grade, 20230.64 square kilometers represents medium class and 540.32 square kilometers is high class. Based on these results, the planning of the location of new observation points was carried out in areas with moderate to high levels of vulnerability with a total of 87 points scattered throughout the cities in Lampung.
Co-Authors Adam Irwansyah Fauzi Aditya Rizqiansyah Agung Pandi Nugroho Al Attar, Muhammad Nabil Andhika Wahyu Pratama Andri Hernandi Anisa Rahma Dhanty Annisa Nurul Hidayah Arliandy Pratama Atmojo, Aulia Try Azizah, Fadhillah Nur Bambang Edhi Leksono Ching, Kuo-En Een Lujainatul Isnaini Erwin Yosua Fauzi, Adam Irwansyah Hutabarat, Wendi Melvin Isnaini, Een Lujainatul Januarta, Danda Selfa Jayanti, Anita Eka Lestari, Mardiana Tri M Rizky Mardiana Tri Lestari Maulana, Yoga Muhamad Ilvan Ardiansyah Muhamad Sofyan Sauri Muhammad Fikri Muhammad Fikri Muhammad Ulin Nuha Nadzir, Zulfikar Adlan Nisya Kartika 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 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