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Variasi Entropi Permutasi Hasil Pemantauan Aktivitas Seismik Gunung Raung di Jawa Timur Periode Januari 2015 Qori Fajar Hermawan; Sukir Maryanto; Hendra Gunawan
Wahana Fisika Vol 8, No 2 (2023): December
Publisher : Universitas Pendidikan Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17509/wafi.v8i2.61468

Abstract

Entropi permutasi adalah metode statistika yang dapat menentukan tingkat kompleksitasi data time-series. Metode ini dapat digunakan pada data hasil perekaman seismometer di gunung api, termasuk Gunung Raung. Gunung Raung yang menunjukkan aktivitasnya pada Januari 2015 dapat dihitung nilai entropi permutasinya. Variasi entropi permutasi menunjukkan bahwa stasiun RAUN, MLLR, dan POSR memiliki tingkat kompleksitas yang rendah ketika terjadi aktivitas letusan. Variasi entropi permutasi di stasiun KBUR pada saat terjadi letusan tidak menunjukkan penurunan tingkat kompleksitas, karena adanya tremor yang mendominasi. Penurunan nilai entropi permutasi karena adanya aktivitas tremor dapat digunakan sebagai early warning system. Namun, hal ini butuh penelitian lebih lanjut.
Analisis Metode Magnetik pada Daerah Manifestasi Panas Bumi Karangrejo, Kabupaten Pacitan Mayang Bunga Puspita; Cholisina Anik Perwita; Sukir Maryanto; Imam Suyanto
INSOLOGI: Jurnal Sains dan Teknologi Vol. 2 No. 5 (2023): Oktober 2023
Publisher : Yayasan Literasi Sains Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55123/insologi.v2i5.2662

Abstract

Geothermal energy is one of the natural resources found in Pacitan Regency, alongside mining and geotourism. Geothermal manifestations in Pacitan Regency take the form of hot springs located at two points: Tinatar in the Punung District and Karangrejo in the Arjosari District. This research primarily focuses on magnetic measurement methods at the Karangrejo hot spring manifestation to provide information about its subsurface geological conditions. Data acquisition was conducted using 2 Proton Precision Magnetometers (PPM) of the Geotron G-5 brand as both base and rover instruments. The acquired data was processed with diurnal correction, IGRF correction, separation of residual-regional anomalies, and Reduce to Pole (RTP) transformation. The research results show magnetic anomaly variations in the study area ranging from -220 nT to 200 nT. Some geological structures that could potentially be associated with the Karangrejo hot spring manifestation are north-south trending faults and northeast-southwest trending faults, while the lithology of the study area is dominated by kaolin alteration and andesite rocks. It is estimated that the Karangrejo geothermal system is a fault-hosted geothermal system resulting from fault activity.
SHARE WAVE VELOCITY MODEL TO A DEPTH OF 30 METER (Vs30) USING HORIZONTAL VERTICAL TIME FREQUENCY ANALYSIS (HVTFA) METHOD Ridha, Syawaldin; Syafitri, Meta; Maryanto, Sukir; Martha, Agustya Adi
Journal of Environmental Engineering and Sustainable Technology Vol 9, No 01 (2022)
Publisher : Directorate of Research and Community Service (DRPM)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jeest.2022.009.01.1

Abstract

A share wave velocity model to a depth of 30 meter (vs30) can be used to find the type of the ground as a preventive action against earthquake disaster mitigation. Vs30 is obtained from the inversion of ellipticity curve using HVTFA method. HVTFA method is a method that can minimize the love curve in the ellipticity curve. Therefore, a more reliable share wave velocity can be obtained. It is necessary to find reliability of a model in a further research. The objectives of this research were to find the reliability of HVTFA and HVSR methods and determine the reliability of vs30 model from the result of inversion of Rayleigh-wave ellipticity curve using HVTFA method with duration of microtremor measurement of 0.5 hour, 1 hour, 2 hours, 3 hours, 4 hours, 5 hours and 6 hours. Data used in this research were microtremor data. The microtremor data were processed using HVTFA and HVSR method in Geopsy software to find the ellicpticity curve. Next, the inversion of ellipticity was carried out in dinver software to obtain the share wave velocity model. After that, the error value from the model was calculated using vs%Miss, Boun%Miss, Ev, and Eb. The error value of HVTFA method still met the requirement of reliable model, but not the error value of HVSR method. The high error value in HVSR method was found in Bound%Miss and Eb. It meant that the share wave velocity of HVSR method had a high error value in the estimation of surface depth and thickness. Therefore, HVTFA method produced a more reliable vs30 model than HVSR method. In addition, the velocity model of HVTFA method from microtremor data with duration of 0.5 hour, 1 hour, 2 hours, 3 hours, 4 hours, 5 hours and 6 hours also had reliable model. 
Feasibility of Management of a Green Campus Photovoltaic Solar Power Plant National Institute of Technology Malang: Literature Review Asnawi, Rijal; Antariksa; Maryanto, Sukir; Afandhi, Aminudin; Widodo, Kartiko Ardi
Jurnal Pembangunan dan Alam Lestari Vol. 15 No. 2 (2024): Jurnal Pembangunan dan Alam Lestari
Publisher : Postgraduate School of Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jpal.2024.015.02.09

Abstract

The research aims to analyze the feasibility of managing a green campus photovoltaic solar power plant at the National Institute of Technology Malang. The method used is a literature review study. This method involves searching, selecting, and analyzing articles, books, journals, and other literature sources relevant to this research topic. The research results show that the National Institute of Technology (ITN-Malang) photovoltaic solar power plant (Pembangkit Listrik Tenaga Surya /PLTS) has fulfilled the energy efficiency aspect, an indicator of a green campus. Apart from that, the research results reveal that the feasibility of managing the National Institute of Technology (ITN-Malang) photovoltaic solar power plant (PLTS) from a green campus perspective considers environmental, economic, and social aspects. These three aspects have met the standards for the feasibility of managing a solar photovoltaic power plant at a university that meets green building criteria, including energy conservation, energy efficiency, and renewable energy. However, further studies are still needed related to environmental aspects, especially the use of land in the solar photovoltaic power plant area and the handling, development, and management of solar panel waste. Keywords: green campus, feasibility, management, solar power plant
Deformation Of Lava Tounge at Semeru Volcano using Sentinel-1 DInSAR Chandra, Yuliana Iik Iswanti; Maryanto, Sukir; Susilo, Adi; Faridha Aprilia; Mayang Bunga Puspita
Journal of Geoscience, Engineering, Environment, and Technology Vol. 10 No. 1 (2025): JGEET Vol 10 No 01 : March (2025)
Publisher : UIR PRESS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25299/jgeet.2025.10.1.21444

Abstract

Indonesia is vulnerable to various natural disasters, especially volcanic eruptions.  Mount Semeru, located between Malang and Lumajang, is an active volcano with a history of significant eruptions.  The eruption on December 4, 2021, caused many casualties and infrastructure damage.  This research utilizes Sentinel-1 (SLC) satellite imagery to analyze deformation changes caused by the eruption, with a particular focus on DInSAR analysis to depict changes in the crater's shape.  Before the eruption, no significant volcanic activity was detected, resulting in no clear deformation changes, with a deflation range between -0.096 cm and -0.145 cm.  However, during the eruption, the outflow of lava forming lava tongues led to the formation of lava deposits that affected surface deformation.  During the eruption phase, the deformation changes indicate an inflation phase, with values ranging from 0.064 cm to 0.094 cm, reflecting surface movement due to the accumulation of volcanic material.  After the eruption, the deformation changes became more pronounced due to the perfectly and stably formed lava deposits, with an inflation value range between 0.037 cm and 0.079 cm, resulting in significant surface shifts.  Phase reading disturbances were also detected at several locations due to lahar flows that occurred during and after the eruption.  The results of this study provide beneficial information for the relevant parties in formulating disaster mitigation strategies related to Mount Semeru's activities, as well as in understanding the dynamics of surface deformation influenced by eruptions, lava flows, and the formation of lava tongues.
LANDSLIDE AREA MAPPING IN DAMPIT SUBDISTRICT, MALANG DISTRICT, EAST JAVA PROVINCE USING SATELLITE IMAGERY OF GRAVITY DATA FOR DISASTER MITIGATION Sutasoma, Muwardi; Susilo, Adi; Maryanto, Sukir; Aprilia, Faridha; Bunga Puspita, Mayang; Habibiy Idmi, Mohammad; Hasan, Muhammad Fathur Rouf; Almais, Agung Teguh Wibowo; Herwiningsih, Sri
Indonesian Physical Review Vol. 8 No. 3 (2025)
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/ipr.v8i3.487

Abstract

Research using satellite imagery of gravity data has been conducted in the Dampit District, Malang Regency, East Java Province. This research was conducted to identify areas vulnerable to landslides. The results of this research can serve as a basis for the government to develop effective landslide disaster mitigation policies, thereby minimizing the losses incurred. The data used is TOPEX satellite gravity data in the form of Free Air Correction data, and supported by landslide vulnerable areas data from the InaRisk satellite. The research area is 23 km x 16 km with 2 km spacing between points and 184 measurement points. Furthermore, the research area is divided into four areas: Area A1, Area A2, Area A3, and Area A4.  The residual anomaly value in the study area is between 82.7 mGal to 142.4 mGal. The residual anomalies are more variable due to the local nature of the anomalies. The correlation between the residual anomaly value and InaRisk satellite image data shows that Area A4 is the most vulnerable to landslides, especially if there is a trigger such as an earthquake.  This is because Area A4 has a low-density value, a large fault, and is the contact area between the Mandalika Formation and Wuni Formation.
ALTERNATIF PERHITUNGAN SIGNIFIKANSI ENSO TERHADAP CURAH HUJAN: BOOTSTRAP GANDA DAN TRIWULAN PENUH Yudi, Muhammad Nurwahyudi; Maryanto, Sukir; Efani, Anthon; Kurniawan, Andang
Jurnal Geosaintek Vol. 11 No. 2 (2025)
Publisher : Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j25023659.v11i2.6396

Abstract

Modulasi El Nino-Southern Oscillation (ENSO) memengaruhi curah hujan di wilayah monsunal seperti Jawa Timur, tetapi pendekatan triwulan konvensional (DJF, MAM, JJA, SON) sering gagal menangkap variasi musiman dan meningkatkan risiko salah positif. Penelitian ini mengusulkan pendekatan alternatif untuk mengevaluasi signifikansi modulasi El Nino-Southern Oscillation (ENSO) terhadap curah hujan menggunakan analisis 12 triwulan tumpang tindih dan metode bootstrap ganda. Fokus penelitian bertujuan untuk menghasilkan alternatif perhitungan signifikansi ENSO terhadap curah hujan melalui pendekatan bootstrap ganda. Data curah hujan bulanan dari 202 pos hujan utama periode 1991–2020 diolah menjadi 12 periode triwulanan untuk menangkap variasi yang tidak ditangkap oleh pendekatan triwulan konvensional. Oceanic Nino Index (ONI) digunakan untuk mengkategorikan fase ENSO. Metode bootstrap ganda digunakan dengan melakukan bootstrap ke curah hujan pada fase El Nino dan La Nina. Hasil bootstrap kemudian dibandingkan dengan menggunakan histogram dengan pendekatan lebar Freedman-Diaconis. Hasil menunjukkan bootstrap ganda mampu memberikan gambaran signifikansi yang lebih ketat dibandingkan bootstrap tunggal. Batas 90% direkomendasikan sebagai taraf signifikansi. Triwulan penuh mampu memberikan gambaran yang lebih baik dibandingkan penggunaan triwulan konvensional. Analisis spasial dan regresi mengidentifikasi kabupaten dengan signifikansi modulasi ENSO yang lebih kuat. Pendekatan alternatif ini menawarkan evaluasi yang lebih rinci dan fleksibel untuk menilai apakah ENSO memodulasi curah hujan suatu wilayah secara signfikan.
Hazards Mitigation of Lahar Flows on Semeru Volcano after the 4 December 2021 Eruption Based on PS-InSAR Perwita, Cholisina Anik; Aprilia, Faridha; Maryanto, Sukir; Arrasyid, Harun; Tsabitah, Aqyla Farah
International Journal of Disaster Management Vol 5, No 3 (2022)
Publisher : TDMRC, Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24815/ijdm.v5i3.29098

Abstract

Volcanic eruption is one of the phenomena that can change the volcanic landscape drastically. Monitoring of volcanic edifices after eruptions should be considered to further understand the potential hazards in the future. Satellite monitoring is a reliable technique for assessing deformation in a volcano. InSAR was applied to detect material build-up after the eruption phase of Semeru Volcano in December 2022. As a consequence of the opening crater along with the InSAR result, a lahar product after the eruption was deposited in the southwest direction. Significant deformations were indicated by PS-InSAR near the crater, which was characterized by a LOS displacement of -10 to -40 mm/year, indicating scouring of the pyroclastic material moving down the slope. The accumulation of pyroclastic flows from the abrading process below was detected in the proximal zone of Semeru, as shown by the positive LOS displacement ranging from 10 to 40 mm/year. The field survey conforms to the PS InSAR results, where unconsolidated material, ranging in size from gravel to boulders, piles up approximately 4-5 m in Curah Kobokan. Highly unconsolidated material tends to move easily by water and threaten the surrounding settlements. Overlying PS InSAR and drainage pattern in the flank of Semeru, concluding several locations that have a high-risk potential of being affected by lahar flows are Curah Kobokan, Supiturang Village, Pronojiwo District, then Tulungrejo, Pasropan Village, Pasrujambe District, Lumajang Regency.
Implementation of Town and School Watching for Disaster Education to the Communities in Sidomulyo Village, Pronojiwo, Lumajang Maryanto, Sukir; Setyowati, Alvira Galihputri; Aprilla, Arga Nanda; Sari, Rendi Pradila Hab; Ramadhani, Naufal Helmi; Tolle, Herman; Nurjannah, Nurjannah; Sujarwo, Sujarwo; Harmoko, Udi
International Journal of Disaster Management Vol 5, No 2 (2022)
Publisher : TDMRC, Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24815/ijdm.v5i2.29175

Abstract

The eruption of Mount Semeru on December 4, 2021, caused a fairly high death toll of up to 50 people. The high number of fatalities is caused by the lack of mitigation capacity and the absence of community involvement in mitigation efforts. Increased mitigation capacity can be done by presenting disaster education to the communities. Thus, we applied the concepts of school watching and town watching in Pronojiwo District, Lumajang Regency. School watching was implemented in eight schools located at Sidomulyo Village. We also carried out town watching in Sidomulyo Village and brought out 33 residents to the Sidomulyo village hall. The implementation of school watching and town watching in Pronojiwo District can increase community involvement in disaster mitigation efforts and public awareness of mitigation efforts.
IDENTIFIKASI STRUKTUR GEOLOGI DAN PENGARUHNYA TERHADAP SUHU PERMUKAAN TANAH BERDASARKAN DATA LANDSAT 8 DI LAPANGAN PANASBUMI BLAWAN Azhari, Anjar Pranggawan; Maryanto, Sukir; Rachmansyah, Arief
Jurnal Penginderaan Jauh dan Pengolahan Data Citra Digital Vol. 13 No. 1 (2016)
Publisher : Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30536/inderaja.v13i1.3316

Abstract

This paper presents the use of remote sensing methods for identifying geological structures on the Blawan-Ijen geothermal field and its system. Remote sensing data, specifically Landsat 8 and DEM SRTM, were utilized to extract lineaments from the 753 multispectral band and derive land surface temperature (LST) from a single thermal infrared band using a retrieval method. Surface emissivity was determined based on the Normalized Difference Vegetation Index (NDVI) of the study area. Remote sensing analysis proved to be an effective approach for identifying geological structures from the surface that control thermal manifestations in the Blawan geothermal field. The results indicate that the Blawan fault is the primary structure in the geothermal field, associated with high LST and hot springs. Interpretation suggests that the reservoir of the Blawan-Ijen geothermal system extends from Plalangan to the southwest area.
Co-Authors A.A. Ketut Agung Cahyawan W Achmad, Fariz Adi Susilo Adi Susilo Adi Susilo Adi Susilo Adi Susilo Adi Susilo Adi Susilo agung syufi ghozali Agung Teguh Wibowo Almais Agus Budianto Agus S Wicaksono Ahmad Nadhir Akhmad Afandi Akhmad Afandi Alamsyah Mohammad Juwono Alvira Galihputri Setyowati Amalia Cemara Nuraidha, Amalia Cemara Aminudin Afandhi Aniriani, Gading Wilda Anjar Pranggawan Azhari Antariksa Anthon Efani Aprilia, Faridha Aprilla, Arga Nanda Aqyla Farah Tsabitah Arga Nanda Aprilla Arief Rachmansyah Arief Rachmansyah Arief Rachmansyah Arif Rachmansyah Arif Rahman Hakim Arin Wildani Arrasyid, Harun Asnawi, Rijal Bambang Avianthara Bambang Heri Purwanto Barika Novanta Barqi Muhammad Irsyad, Barqi Muhammad Bunga Puspita, Mayang Chandra, Yuliana Iik Iswanti Cholisina Anik Perwita Cholisina Anik Perwita Cholisina Anik Perwita Cholisina Anik Perwita Cinantya N Dewi Cinantya Nirmala Dewi Cinantya Nirmala Dewi Dafiqiy Ya'lu Ulin Nuha dahlia kurniawati irawan Delfi Intan Faniza Deni Saputra Dian Pratiwi Malik Didik R Santoso Didik R. Santoso Didik R. Santoso Didik R. Santoso Didik R. Santoso Didik Rahadi Santoso Didik Rahardi Santoso Drs Wasis Dwi Wahyudi Eddy Z Gaffar Endah Juniarti Fajar Rakhmanto Fajar Rakhmanto Fajar Rakhmanto Faridha Aprilia Faridha Aprilia Febriana Rachmawati, Febriana Fitor Imanul Huda Fitri Indah Pratiwi, Fitri Indah Gancang Saroja Geovanio Pedro da Silva Almeida Habibiy Idmi, Mohammad Harun Arrasyid Hasan Nurudin Hena Dian Ayu Hendarmin Hendarmin Hendra Gunawan Herman Tolle Hetty Triastuti Hetty Triastuty Hetty Triastuty I Ketut Wahyu Nugrahadinata Putra, I Ketut Wahyu Nugrahadinata Ika Karlina Laila Nur Suciningtyas Ika Wahyu Utami Imam Suyanto Joanico Pires Jose da Costa Juwono, Alamsyah Mohammad Kartika Andryana Kartiko Ardi Widodo Kurniawan, Andang Laelah Hilaliyah Istighfaroh Luis Teofilo da Costa MARETA KARTIKASARI Martha, Agustya Adi Mayang Bunga Puspita Meidi Arisalwadi Mohammad Hasib Mudo Prakoso Muhajir Anshori Muhamad Hendrasto Muhammad Bisma Pamungkas Muhammad Fathur Rouf Hasan Muhammad Ghufron Muhammad Hendrasto Muhammad Razi Muwardi Sutasoma Naufal Helmi Ramadhani Nefrizal - Nella Fernania Nugraha, Aulia Kharisma Nuha, Dafiqiy Ya'lu Ulin Nur Aini Gama Lestari Nurjannah Nurjannah Nurjannah Nurjannah Panji Aziz Priambodo Perwita, Cholisina Anik Petrus Demon Sili Qori Fajar Hermawan Raehanayati Raehanayati Rahmawati Rahmawati Ramadhani, Naufal Helmi Ratri Andinisari Rendi Pradila Hab Sari Ridha, Syawaldin Rio Arie Purnama Rizky Kusumawardani Rohmah, Siti Ainur Salman Hamja Siombone Santoso, Didik Rahardi Sari, Rendi Pradila Hab Setyawan P. Sakti Setyowati, Alvira Galihputri Siswo Purnomo Sri Dwi Wuryani, Sri Dwi Sri Herwiningsih Stevany Abigail Sujarwo Sujarwo Sujarwo Sujarwo Surya Aji Ermanto Susilo, Adi Syafitri, Meta Taufan Surana, Taufan tika yulia astuti Tommy Hendriansyah, Tommy Tri Deni Rahman Tsabitah, Aqyla Farah Udi Harmoko Udi Harmoko Usna Zainun Nasrulloh Zamhar Vani N. Ningtyas SC, Vani N. Ningtyas Vanisa Syahra, Vanisa Verna A. Suoth Wicaksono, Rizky Rahadian Yudi, Muhammad Nurwahyudi Yuliana Iik Iswanti Chandra Zulfa Khalida