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All Journal JPSE (Journal of Physical Science and Engineering) Journal of Geoscience, Engineering, Environment, and Technology Indonesian Physical Review Bubungan Tinggi: Jurnal Pengabdian Masyarakat Yustisi: Jurnal Hukum dan Hukum Islam Inovasi Fisika Indonesia (IFI)
Muhammad Nurul Fahmi
Physics Department, Faculty Of Mathematics And Natural Sciences, Universitas Negeri Surabaya, Jl. Ketintang, Surabaya, 60231, Indonesia. Center For Earth Science Studies, Faculty Of Mathematics And Natural Sciences, Universitas Negeri Surabaya, Jl. K
Astronomy Earth & Planetary Sciences Education Electrical & Electronics Engineering Engineering Environmental Science Materials Science & Nanotechnology Physics Social Sciences Other

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IDENTIFIKASI SESAR-PALU KORO DENGAN CENTROID MOMENT TENSOR (CMT) MENGGUNAKAN INVERSI WAVEFORM TIGA KOMPONEN MUHAMMAD NURUL FAHMI; MADLAZIM
Inovasi Fisika Indonesia Vol 8 No 2 (2019)
Publisher : Jurusan Fisika FMIPA Universitas Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/ifi.v8n2.p%p

Abstract

Penelitian ini dilaksanakan dengan tujuan menganalisis hasil estimasi Centroid Moment Tensor (CMT) gempa di sekitar Sesar Palu-Koro menggunakan inversi waveform tiga komponen yang di implementasikan dalam software MTINV. Daerah penelitian ini terletak di sekitar Sesar Palu-Koro, hal ini karena Sesar Palu-Koro merupakan sesar yang aktivitas kegempaannya cukup tinggi di Pulau Sulawesi. Data yang digunakan pada penelitian ini merupakan data sekunder waveform tiga komponen pada tanggal 28 September 2018 dengan magnitudo 7.5 SR dan 1 Oktober 2018 dengan magnitudo di 4.7 SR yang diunduh dari WebDC3 BMKG. Estimasi CMT sebagai parameter gempa menggunakan metode inversi waveform dan fungsi Green tiga komponen yang sudah diimplementasikan ke dalam sebuah software MTINV. Estimasi CMT menghasilkan antara lain yaitu momen seismik (????o), magnitudo momen (????w), lattitude, longitude, kedalaman centroid, dan orientasi bidang sesar (nodal plane/NP) yang meliputi sudut strike, dip, dan rake. Selain itu estimasi CMT juga dapat memberikan informasi mengenai penyebab terjadinya gempa yang meliputi persentase ISO, DC, dan CLVD. Hasil dari penelitian ini yaitu kedua event gempa mempunyai nilai persentase DC yang lebih dominan daripada CLVD dengan nilai VR lebih dari 50%, hal ini menunjukkan bahwa kedua event gempa yang terjadi disekitar Sesar Palu-Koro ini disebabkan karena adanya aktivitas tektonik. Berdasarkan nilai VR, maka hasil dari penelitian ini bisa dikatakan reliable karena telah memenuhi syarat. Event gempa pada tanggal 28 September 2018 dan 1 Oktober 2018 keduanya disebabkan oleh tipe sesar strike-slip. Sehingga dapat disimpulkan bahwa penyebab terjadinya kedua event gempa tersebut disebabkan oleh Sesar Palu-Koro. Kata Kunci : Centroid Moment Tensor, software MTINV, Sesar Palu-Koro, inversi waveform tiga komponen
DETERMINATION OF RUPTURE DIRECTIVITY USING THE LEVENBERG-MARQUARDT ALGORITHM: A CASE STUDY PHILIPPINE EARTHQUAKE (15 DECEMBER 2019 M_w 6.8) Muhammad Nurul Fahmi; Sungkono Sungkono; Madlazim Madlazim
Indonesian Physical Review Vol. 6 No. 1 (2023)
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/ipr.v6i1.199

Abstract

Earthquake source mechanisms are used to determine local geological characteristics and hazard mitigation. There are several approaches to determine the mechanism of earthquake. In this paper, the relative time of the rupture duration is applied to determine rupture directivity. In determining rupture directivity, the Levenberg-Marquardt (LM) method is proposed to solve the inversion problem. To test the reliability of this method, teleseismic data with an epicentral distance of 40o from the Philippine earthquake on 15 December 2019  6.8, which had a good seismic station distribution with a total of 35 stations, is used. Telesismic data from each station is filtered in the range of 0.25 to 1 Hz to obtain an accurate rupture duration. Furthermore, the rupture duration data set was inverted using the LM method to obtain the direction of earthquake rupture. The results obtained by the curve fitting using the LM method had a good agreement between the observed data and the calculated data. From the curve fitting results, the rupture propagated in the NW direction with azimuth 320.60o ± 2.30o, and this had the same results from previous studies. Therefore, from rupture directivity, the actual fault plane of this earthquake was NP1 which had a strike/dip/rake value of 321o/75o/13o, respectively. The results indicate that the Philippines earthquake of 15 December 2019 had the SE-NW fault orientation, which is part of the Cotabato fault system. The implication of this research is for a preliminary study related to the characteristics of earthquake rupture in areas that have a high level of seismicity. Thus, local residents can avoid areas where ruptures propagate when carrying out earthquake mitigation.
Detection of Lahar Flow Direction from Semeru Eruption on 4 December 2021 using Gravity Method Arie Realita; Muhammad Nurul Fahmi; Tjipto Prastowo; Madlazim Madlazim
JPSE (Journal of Physical Science and Engineering) Vol 7, No 2 (2022): JPSE (Journal of Physical Science and Engineering)
Publisher : Universitas Negeri Malang

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

Abstract

Mount Semeru, an active, steep-sided volcano in East Java, erupted on 4 December 2021 following extreme rainfall that led to an avalanche of hot pyroclastic flows and lahars. Besides a debatable eruption source with no preceding seismic signals observed, it has drawn the international community's attention for its extent of largely impacted areas down the summit. In this study, we used gravity method modeling of the local anomaly in density distribution after the event to determine the unique pattern of the lahar flow direction with the corresponding extent and the spread of the flow. The data were collected from a TOPEX satellite altimeter and processed using a number of specific techniques to obtain a contoured map of local anomaly. The results showed that the main path of the flow was found to descend down the slope to the southeast of the crater, extending to a distance of about 20 km with a maximum lahar flow width of about 2 km toward agricultural lands and populated areas, consistent with the high-resolution satellite imagery produced by UNOSAT-UNITAR. It suggests that gravity anomaly could be used to simulate the flow pattern and the widespread damage of volcanic materials after an eruption.DOI: 10.17977/um024v7i22022p075
ANALISIS ASPEK KINEMATIK PERAMBATAN RUPTURE GEMPA SUMATERA-ANDAMAN 26 DESEMBER 2004 Budiman Zebua; Muhammad Nurul Fahmi; Tjipto Prastowo
Jurnal Inovasi Fisika Indonesia (IFI) Vol 12 No 1 (2023): Vol 12 No 1
Publisher : Jurusan Fisika FMIPA Universitas Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/ifi.v12n1.p104-112

Abstract

Abstrak Gempa Sumatera-Andaman 2004 memicu tsunami global yang menyapu pesisir barat Provinsi Aceh dan wilayah terdampak lain di berbagai belahan dunia. Banyak hal penting, misalnya proses kinematik rupture belum terjawab tuntas. Pertanyaan tentang parameter kinematik rupture (rupture duration, rupture extent, rupture speed, rupture directivity) dan mengapa Phuket, Thailand yang terpisah oleh daratan Sumatera bagian utara ikut terdampak tsunami dijawab melalui penelitian ini. Oleh karena itu, penelitian ini bertujuan menganalisis dan mendiskripsikan proses rupture gempa 9,1 Sumatera-Andaman 2004 dengan bantuan metode 0,25-1,0 Hz multiple signal classification back-projection imaging (MUSIC BPI) berbasis sinyal seismik gelombang P koheren berfrekuensi tinggi yang diperoleh dari jaringan stasiun seismik Eropa (EU array). Hasil analisis citra proses rupture beresolusi tinggi mendiskripsikan rambatan unilateral energi gempa megathrust menuju ke arah utara sepanjang jalur zona subduksi pertemuan Lempeng India, Lempeng Australia dan Lempeng Burma melewati Kepulaun Nicobar menuju Kepulauan Andaman. Analisis lanjut memanfaatkan radiator berfrekuensi tinggi menemukan radiasi gempa selama 480 s (durasi rupture) yang berkorelasi dengan panjang rupture 1400 km dan memindahkan energi gempa dengan laju 2,9 km/s (kecepatan rupture). Temuan penelitian ini sama dengan hasil-hasil penelitian terdahulu. Mekanisme pelepasan energi berlangsung dalam beberapa tahap, di mana pada detik ke 160 yang setara dengan jarak tempuh sekitar 400 km, energi gempa mencapai Kepulauan Nicobar dan mengalami amplifikasi akibat efek lokal sehingga memicu episenter baru sesudah episenter utama yang berada di lepas pantai barat Sumatera bagian utara. Episenter baru inilah yang memicu gelombang tsunami yang menerjang wilayah Phuket, Thailand. Kata Kunci : kinematika rupture, gempa Sumatera-Andaman 2004, MUSIC BPI Abstract The 2004 Sumatra-Andaman earthquake triggered a global tsunami striking the west coast of Aceh Province and other affected areas around the world. Many things, such as rupture kinematics have not been resolved. Questions about kinematic parameters (rupture duration, rupture extent, rupture speed, rupture directivity) and why Phuket, Thailand, separated by northern Sumatra mainland, was affected by the wave are explained in this study. Thus, this study aims to analyze rupture processes of the 2004, 9,1 Sumatra-Andaman event using 0.25-1.0 Hz multiple signal classification back-projection imaging (MUSIC BPI) on coherent P-wave signals. The high-frequency signals were obtained from a network of European stations (EU array). The results of high-resolution rupture image analysis showed unilateral propagation of the energy, heading north along the subduction zone where Indian, Indo-Australian and Burmese plates meet and passing through Nicobar Islands towards Andaman Islands. Further analysis of high-frequency radiators found that the radiation lasted for 480 s (rupture duration) which correlated to a rupture length of 1400 km and transported the energy at a rate of 2.9 km/s (rupture velocity). All findings agree well with previous work. In addition, mechanisms for energy release took place in several stages, where at 160 seconds equivalent to a distance of 400 km, the energy reached Nicobar Islands and experienced amplification owing to local effects, causing a new epicenter after the main one, located off the westcoast of northern Sumatra Island. This new epicenter triggered a tsunami wave that hit Phuket, Thailand. Keywords: rupture kinematics, Sumatra-Andaman 2004 earthquake, MUSIC BPI
Assistance in Making Dynamic Electricity KITs Based on Scientific Argumentation Skills for Physics Teachers in Sidoarjo Senior High School Utama Alan Deta; Muhammad Nurul Fahmi; Alfi Nurlailiyah; Ria Rusmawati; Mita Anggaryani; Budi Jatmiko
Bubungan Tinggi: Jurnal Pengabdian Masyarakat Vol 5, No 2 (2023)
Publisher : Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/btjpm.v5i2.6919

Abstract

Physics learning cannot be separated from studying abstract concepts and practical activities to help students understand concepts in real terms. In the learning process, practical tools are needed to made easily and used in learning. The limited equipment in the laboratory is one of the obstacles to the lack of optimal learning activities, especially in practical activities. Therefore, teachers are required to be more creative and innovative in utilizing the tools around them so they can be used as practical tools. Dynamic electricity is also seen as an abstract concept requiring a practicum so that students can understand the concept real and meaningfully. Then, the other obstacle is scientific argumentation skills that still need to be better trained or not contained in the learning materials. It makes students' skills in scientific argumentation still lacking. The solution is: Synergize with the Physics Senior High School Teachers in Sidoarjo. They are trained through training to make physics practicum tools. Thus, the training participants can make these practical tools, can arrange student worksheets according to these tools and based on scientific argumentation skills. They can apply them in learning at their school. The result of this training is that the response of the Physics Senior high school teachers to the materials and demonstrations is very enthusiastic and interesting. This is evidenced by the average response questionnaire results of 3.44 with the maximum value of the questionnaire being 4. The maximum value obtained based on the response questionnaire is 3.66 and the lowest is 3.28.
Exploration of The Magnetic Rocks Potential of Mount Penanggungan: A Study of Myth, History, and Its Implications for Educators and Mountaineers Iqbal Ainur Rizki; Eko Hariyono; Muhammad Nurul Fahmi; Madlazim; Eka Puji Astuti; Muhammad Eka Abdul Ghofar; Luthfi Aryani
Journal of Geoscience, Engineering, Environment, and Technology Vol. 8 No. 2 (2023): JGEET Vol 08 No 02 : June (2023)
Publisher : UIR PRESS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25299/jgeet.2023.8.2.11954

Abstract

This study explores the potential of magnetic stones on Mount Penanggungan and their relation to history and myths circulating in the community and climbers. This research is important to do in order to minimize the rate of injury caused by fatigue for climbers on this mountain. In addition, aspects of physics and history can be implications for educators to deliver material on the subject. This research uses a qualitative design with the type of case study—data collection methods through observation, interviews, and document studies. The results of this study show that some rocks on Mount Penanggungan, especially when approaching their peak, have a magnetic field anomaly up to 4 times larger than the magnetic field on the earth’s surface, characterized by its darker color or cave walls. Based on the mythical and historical review, the role of magnetic stones underlies the reason ancient people performed hermitage on rocks and in Mount Penanggungan. This study implies that it can be information for climbers that rocks with a strong magnetic field magnitude can accelerate the relaxation of the body. In addition, educators can integrate this research’s findings, including physical phenomena and historical/mythical aspects on Mount Penanggungan, into learning.
JATAH WARISAN CUCU PEREMPUAN (Analisis Putusan Pengadilan Agama Jakarta Timur Nomor 703/Pdt.p/2021/PA.JT) Nadia Paspashafira Rafsanjani; Muhammad Nurul Fahmi
YUSTISI Vol 11 No 2 (2024)
Publisher : Universitas Ibn Khaldun Bogor

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32832/yustisi.v11i2.16695

Abstract

Warisan seringkali menjadi salah satu pemicu konflik yang sering menimbulkan perpecahan dalam keluarga. Penetapan ahli waris dan penghitungannya menjadi hal yang penting yang harus diperhatikan. Penelitian ini bertujuan untuk mengetahui penetapan dari cucu perempuan dari anak perempuan yang menjadi ahli waris dalam putusan Pengadilan Agama Jakarta Timur. Pendekatan yang digunakan dalam penelitian ini adalah kualitatif dengan metode library research dan analysist document. Peneliti meneliti putusan dari Pengadilan Agama Jakarta Timur lalu mencari dasar yang diambil oleh pengadilan serta membandingkannya dengan hukum Islam. Cucu perempuan dari anak perempuan mendapatkan warisan ketika menjadi dzawil arham. Keputusan cucu perempuan dari anak perempuan menjadi ahli waris dengan dasar sebagai ahli waris pengganti adalah hal yang tidak benar dengan lemahnya dasar dari Pengadilan Agama. Kata kunci : Waris; Ahli Waris Pengganti; Cucu Perempuan
Co-Authors Alfi Nurlailiyah Arie Realita Budi Jatmiko Budiman Zebua Eka Puji Astuti Eko Hariyono Iqbal Ainur Rizki Luthfi Aryani Madlazim Madlazim Madlazim Madlazim Madlazim Madlazim Mita Anggaryani Muhammad Eka Abdul Ghofar Nadia Paspashafira Rafsanjani Prima Rama Fitrilia Ria Rusmawati Sungkono Sungkono Tjipto Prastowo Tjipto Prastowo Utama Alan Deta