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All Journal POSITRON Jurnal Sains Dasar Jurnal Tata Kota dan Daerah Jurnal Fisika Unand JGE (Jurnal Geofisika Eksplorasi) JPSE (Journal of Physical Science and Engineering) INDONESIAN JOURNAL OF APPLIED PHYSICS Jurnal Geosains dan Teknologi KURVATEK Jurnal Teras Fisika : Teori, Modeling, dan Aplikasi Fisika Navigation Physics : Journal of Physics Education Advance Sustainable Science, Engineering and Technology (ASSET) Kaunia: Integration and Interconnection of Islam and Science Journal Cakrawala Jurnal Ilmu Fisika dan Terapannya (JIFTA) Jurnal Stasiun Geofisika Sleman (JSGS) Jurnal Geologi dan Sumberdaya Mineral (Journal of Geology and Mineral Resources) Berkala Arkeologi Wahana Fisika : Jurnal Fisika dan Terapannya Sunan Kalijaga Journal of Physics Jurnal Fisika Rekayasa: Jurnal Penerapan Teknologi dan Pembelajaran
Nugroho Budi Wibowo
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Religion Astronomy Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Engineering Environmental Science Materials Science & Nanotechnology Mathematics Physics Social Sciences Transportation Other

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Comparison of Seismic Vulnerability Index Microzonation Using Usgs Vs30 Data and Microtremor Signal Measurements in Prambanan and Gantiwarno Sub-Districts, Klaten Regency: Perbandingan Mikrozonasi Indeks Kerentanan Seismik (Kg) Hasil Pengolahan Vs30 Usgs dengan Pengukuran Sinyal Mikrotremor di Kecamatan Prambanan dan Kecamatan Gantiwarno Kabupaten Klaten Fajarningrum, Fitri; Wibowo, Nugroho Budi
Sunan Kalijaga Journal of Physics Vol. 6 No. 1 (2024): Sunan Kalijaga Journal of Physics
Publisher : Prodi Fisika Fakultas Sains dan Teknologi UIN Sunan Kalijaga Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14421/physics.v6i1.5138

Abstract

The May 27, 2006 tectonic earthquake that rocked the Bantul area of Yogyakarta and several areas in Central Java resulted in a lot of damage to buildings and casualties. Earthquake is a disaster that can be minimized by disaster mitigation, one of which is the seismic vulnerability index data of an area. This study aims to compare the microzonation of the seismic susceptibility index (Kg) as a result of measurement of microtremor signals by processing data Vs30 USGS. The data used were 30 microtremor signal measurement points and topographic models from the USGS website in Prambanan and Gantiwarno Districts, Klaten Regency. The calculation result of Vs30 USGS shows the value of seismic vulnerability index (Kg), which ranges from to . Meanwhile, the seismic vulnerability index value (Kg) results from the measurement of the microtremor signal, which ranges from to . Comparative graphs of data from measurements of microtremor signals with the results of processing Vs30 USGS produced R-values square small. This is due to several factors, namely the shift of measurement points with data points Vs30 USGS (longitude and latitude slightly shifted). In addition, the results of calculation of Vs30 USGS are based on the topography of the earth's surface which is limited to a depth of 30 meters so that it does not represent the results of measurement data directly.
Visualization of Microseismic Processing by Coding with GNU Octave Purnama, Aditya Yoga; Nurhanafi, Kholis; Susanti, Susanti; Wibowo, Nugroho Budi
Navigation Physics : Journal of Physics Education Vol 7, No 1 (2025): Navigation Physics : Journal of Physics Education Vol. 7 No. 1 Tahun 2025
Publisher : UNIVERSITAS INDRAPRASTA PGRI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30998/npjpe.v7i1.3965

Abstract

The use of software in the field of geophysics is often limited to the instantaneous use of interfaces without a deep understanding of the computational processes behind them. This leads to limitations in data interpretation and the development of new methods. To address this issue, it is necessary to explicitly visualize the data processing process through programming in order to strengthen computational thinking skills, which are one of the important competencies of the 21st century. This study aims to visualize the microseismic data processing process using programming in GNU Octave software. The method used is a simulation of microseismic data processing based on the HVSR (Horizontal to Vertical Spectral Ratio) approach, with field data collected from the Yogyakarta area. The processing is carried out by building a programming script in GNU Octave, the results of which are then compared with the Geopsy software as a verification tool. The research results indicate that data processing visualization using the HVSR method through GNU Octave can be performed effectively, and the results exhibit high consistency with the output from Geopsy. The dominant frequency on both curves is the same at a frequency of 1.59 Hz. In addition to the dominant frequency, the HVSR curve shape of both software also shows a similar trend pattern in the mid to high frequency range (around 2–10 Hz), where the amplification value decreases gradually. This demonstrates the accuracy of the developed script and proves that this approach can serve as an educational tool for understanding the functioning of geophysical software in a more transparent and in-depth manner. Programming with GNU Octave can be used as an efficient and accurate geophysical analysis tool. This provides opportunities for users, especially in academic environments with limited access to commercial software.
EARTHQUAKE VULNERABILITY MAPPING BASED ON MICROSEISMIC MEASUREMENTS IN THE CAMPUS AREA OF UNIVERSITAS SARJANAWIYATA TAMANSISWA YOGYAKARTA Purnama, Aditya Yoga; Nurhanafi, Kholis; Susanti, Susanti; Wibowo, Nugroho Budi; Perdhana, Radhitya
JGE (Jurnal Geofisika Eksplorasi) Vol. 11 No. 2 (2025)
Publisher : Engineering Faculty Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jge.v11i2.486

Abstract

Building damage caused by earthquakes is more prevalent in the sedimentary areas of Yogyakarta City compared to the hilly regions of Wonosari and Kulonprogo, which have harder soil layers. The campus of Universitas Sarjanawiyata Tamansiswa (UST) is one of the campuses located in Yogyakarta City, where the regional geology is dominated by the Merapi Young Volcanic Deposits Formation. The UST campus area is vulnerable to earthquakes due to its proximity to an active seismic zone, making earthquake vulnerability mapping based on microseismic data an important necessity to support disaster mitigation efforts. The microseismic method was used in this study, while data analysis employed the Horizontal-to-Vertical Spectral Ratio (HVSR). Microseismic measurements were chosen because they have the advantage of not damaging the surface conditions of the ground, thus preserving the environment, and are easy to use in urban areas. The research method stages include survey design, field data collection, data processing and interpretation, and the creation of earthquake vulnerability maps. Data points were collected from 7 locations covering the Universitas Sarjanawiyata Tamansiswa campus area. The research results indicate that the study area has a dominant frequency value ranging from 1.10 to 2.74 Hz. Meanwhile, the amplification value ranges from 1.25 to 2.2. The sediment thickness of the study area ranges from 32 to 79 meters. The Seismic Vulnerability Index (Kg) of the study area ranges from 0.57 to 4 on a low to high scale. Based on the dominant frequency values, amplification, and seismic vulnerability index, the areas of the UST campus that are more vulnerable to earthquakes are the northern, eastern, and central parts, while the southern part is relatively safer.
Identification of Landslide Prone Areas with Schlumberger Configuration Geoelectric Method, Kalongan Village, East Ungaran in 2023 Rahmawati, Zeni; Niyartama, Thaqibul Fikri; Wibowo, Nugroho Budi; Andi, Andi
Advance Sustainable Science, Engineering and Technology Vol 6, No 2 (2024): February - April
Publisher : Universitas PGRI Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26877/asset.v6i2.18163

Abstract

Landslides are one of the natural disasters that occur in Semarang Regency. The landslide event in Kalongan Village, East Ungaran Subdistrict took place in 2022 to 2023. The dimension of the landslide is large and has the potential to cause damage to infrastructure and settlements, mitigation measures are needed. One of the mitigation measures is to identify the lithology of the landslide area and its surroundings. This study aims to determine the lithology of the landslide area and its surroundings using the Schlumberger configuration geoelectric method. Geoelectric acquisition using a set of naniura geoelectric, with a line variation of 120 to 300 meters. The number of measurement lines is 6 VES located in the landslide zone in the Kaligetas Formation. The results showed that the avalanche zone is composed of Tufan Sandstone with a resistivity of 0.17 Ωm to 334.9 Ωm, Tuff with a resistivity of 10.03 to 26.96 Ωm, and Lava Flow with a resistivity of 1161.91 Ωm to 3040.05 Ωm. Avalanche materials were identified to be associated with lithologies such as tufan sandstone and tuff with a thickness between 5 to 50 m.
Subduction and Local Fault Earthquake Analysis Using ST-DBSCAN Clustering Algorithm in The Special Region of Yogyakarta (DIY) Handayani, Wuri; Pratama, Irfan; Wibowo, Nugroho Budi
Kaunia: Integration and Interconnection Islam and Science Journal Vol. 21 No. 1 (2025)
Publisher : Fakultas Sains dan Teknologi UIN Sunan Kalijaga

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14421/kaunia.5347

Abstract

This study aims to analyze the spatio-temporal patterns of subduction and local fault earthquakes in the Special Region of Yogyakarta using the ST-DBSCAN (Spatio-Temporal Density-Based Spatial Clustering of Applications with Noise) algorithm. A total of 5,403 earthquake events from 2019 to 2024 were clustered using spatial parameters (2–5 km) and a temporal window of 10 days. The results were evaluated using the Davies-Bouldin Index (DBI) and Silhouette Score. In the subduction zone, nine clusters were identified with a DBI of 3.23 and a Silhouette Score of 0.18, indicating moderate separation. Meanwhile, 25 clusters were detected in the local fault zone, particularly around the Opak and Oyo Faults, with a higher DBI of 3.82 and a negative Silhouette Score (-0.14), suggesting overlapping clusters and weak structure. The clustering outcomes correlate with geological features and offer insights for improving earthquake hazard assessment and early warning systems in Yogyakarta.
Pemetaan sebaran nilai Vs30, faktor amplifikasi tanah, dan peak ground acceleration wilayah Bantul Timur Bustari, Ahdian Azri; Wibowo, Nugroho Budi
Cakrawala Vol 1, No 2 (2022): Desember
Publisher : Institut Teknologi Dirgantara Adisutjipto

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.28989/cakrawala.v1i2.1436

Abstract

Telah dilakukan penelitian mengenai pemetaan sebaran nilai Vs30, faktor amplifikasi tanah, dan peak ground acceleration (PGA) di wilayah Bantul Timur dengan daerah kajian berada pada koordinat -7.9083496664 s/d -7.9667413705 LS dan 110.3772617315 s/d 110.4509050001 BT. Penelitian ini bertujuan untuk menganalisis dan memetakan sebaran nilai Vs30, site class, faktor amplifikasi tanah, PGA batuan dasar, dan PGA permukaan di wilayah Bantul Timur. Metode yang dilakukan dalam penelitian ialah menggunakan metode pengolahan data sekunder yang bersumber dari Peta Geologi Lembar Yogyakarta, USGS, DEMNAS, dan Data RSA Desain Spektra Indonesia Kementerian PUPR dengan software Surfer dan Global Mapper untuk menghasilkan peta. Hasil dari penelitian ialah berhasil dibuatnya peta sebaran nilai Vs30 dan site class dengan rentang nilai dari 240 – 750  m/s dan klasifikasi tanah sedang serta tanah sangat padat dan batuan lunak, peta faktor amplifikasi tanah dengan rentang nilai 1.5 – 4 s, peta PGA batuan dasar dengan rentang 0.586 – 0.634 g, dan peta PGA permukaan dengan rentang nilai 0.9 – 2.4 g.
Analisis Pergerakan Partikel terhadap Rekaman Mikrotremor di Permukaan Sungai Bawah Tanah Bribin, Kawasan Karst Gunung Sewu Nurhanafi, Kholis; Zarkasi, Ahmad; Intifadhah, Sahara Hamas; Wibowo, Nugroho Budi; Purnama, Aditya Yoga
Jurnal Fisika Unand Vol 12 No 3 (2023)
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jfu.12.3.471-478.2023

Abstract

Microtremor has been widely used to determine soil characteristics and dynamics. In this research, particle motion analysis was conducted on 15 microtremor data recordings around the surface of the Bribin Underground River in the Gunungsewu Karst Area. Spectrum analysis was conducted as a basis for determining the frequency range for the particle motion analysis process. Particle motion analysis was only carried out on the horizontal component of the microtremor signal which is expected to provide a representation of the river flow path. The results of particle motion analysis of microtremor recordings in the surface area of the Bribin Underground River show that there are only two points that have a motion-resultant oriented to certain direction, which is perpendicular to the river channel.The points are A4 and B4 which are located in the eastern part of the river flow path.
Pemodelan Peak Ground Accleration (PGA) dan Intensitas Gempabumi berdasarkan Pengukuran Mikrotremor pada Kawasan Longsor di Desa Kalongan, Ungaran Timur Wibowo, Nugroho Budi; Niyartama, Thaqibul Fikri; Andi, Andi; Septiana, Rena; Widianingrum, Erlina; Bustari, Ahdian Azri; Arif, Iktifal Ajie
Jurnal Fisika Unand Vol 13 No 2 (2024)
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jfu.13.2.225-233.2024

Abstract

The landslide in Kalongan Village affected an area of 5 hectares and has the potential to experience further landslides. Landslides can occur with triggers of external factors such as earthquakes. The Peak Ground Acceleration (PGA) parameter can represent the impacts that occur on the surface in the form of earthquake intensity (MMI). Kalongan Village is 25.5km from the epicenter of the Ambarawa earthquake on 27 May 2023. This study aims to modeling the PGA microzonation and the intensity of the Ambarawa earthquake in the avalanche zone in Kalongan Village. The PGA model is based on measurements of 72 microtremor data in the avalanche zone using the Kanai method. Parameters of the Ambarawa earthquake with a magnitude of 2.5 and a depth of 5 km. The results of PGA modeling in the avalanche zone varied between 1.0-7.1 gal or I-II MMI values. The results of the PGA modeling show that aftershocks can occur if the strength of the Ambarawa earthquake reaches M=4 or 7.1-50.8 gal. The strength of the earthquake is equivalent to the intensity of II-V MMI.
Analisis Manifestasi Panas Bumi Melalu Fault Fracture Density (FFD) Di Wilayah Kamojang, Kecamatan Samarang, Kabupaten Garut Muhammad Faza Syaddad Ar-rafi; Wibowo, Nugroho Budi
KURVATEK Vol 10 No 1 (2025): Energy Management and Sustainable Environment
Publisher : Institut Teknologi Nasional Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33579/krvtk.v10i1.5571

Abstract

Located on the Pacific Ring of Fire, Indonesia has great potential in significant geothermal energy. Kamojang, located in Samarang District, is one of the areas that show this potential. This study aims to assess the existence of geothermal potential in Kamojang through fault density analysis using the Fault Fracture Density (FFD) method. The data used are fault patterns from the National Digital Elevation Model (DEMNas) which are then analyzed to calculate the density of cracks and presented in the form of contour maps. The resulting FFD values range from -0.5 to 9.5 km/km². The results show that the alignment pattern in Kamojang is mostly northwest - southeast, which is closely related to tectonic movements and the formation of active faults in the area. Although the FFD value in this area is relatively low, the presence of active faults still provides a pathway for the movement of geothermal fluids that form geothermal manifestations such as geothermal craters. These results provide important insights to support the management and development of geothermal energy in the Kamojang area.
Seismic Vulnerability Microzonation Using Hvsr Method in Kalisalak Hamlet, Garunglor Village, Sukoharjo Sub-District, Wonosobo District Ardiansyah, Adam; Adhi, Aryono; Wibowo, Nugroho Budi; SARWI; Budi Astuti; Cindiwati
Jurnal Fisika Vol. 14 No. 2 (2024): Jurnal Fisika 14 (2) 2024
Publisher : Universitas Negeri Semarang

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

Abstract

Kalisalak Hamlet in Sukoharjo District is faced with the risk of landslides that can affect the structure of residents' houses. This study aims to identify potential landslide zones based on the parameters of Dominant Frequency (f_0), Amplification Factor (A_0), and Seismic Vulnerability (K_g)to determine areas that are potentially vulnerable to landslides. Microseismic measurements were carried out at 25 measurement points in the landslide zone. Measurements used a 3-component digital portable seismograph (North-South, West-East, and Vertical). Microseismic data were processed using Geopsy software with the HVSR (Horizontal-to-Vertical Spectral Ratio) method to obtain an H/V curve that provides Dominant Frequency (f_0) and Amplification Factor (A_0) values. The results showed that Kalisalak Village has a dominant frequency value between 3 Hz to 12.5 Hz and an amplification factor value between 1.4 to 6.8. This variation indicates that some areas are more susceptible to seismic vibration amplification. Based on the Dominant Frequency (f_0) value and Amplification Factor (A_0), a Seismic Vulnerability (K_g) microzonation map was created for Kalisalak hamlet with a value range of 0.2 to 7 with a high vulnerability value located in the landslide area south of the village. This map is important for disaster mitigation planning in Kalisalak hamlet.
Co-Authors Achmad Maulana Achsan Adam Ardiansyah Aditya Yoga Purnama Ahmad Zarkasi Andi Andi Andi Andi Annas, Mohamad Chairul Arif Gunawan Arif Sudrajat Arif, Iktifal Ajie Aryono Adhi, Aryono Bilqis El Farsiyyi, Billqis El Farsiyyi Budi Astuti Bustari, Ahdian Azri C., Fathunajah Elsha Christalianingsih, Fathunajah Elsa Cindiwati Dea Mutiara Jannah Denny Darmawan Desi Mustami Limayukha, Desi Mustami Limayukha Elsa Fadlika Widyantari, Elsa Fadlika Widyantari Elsha C., Fathunajah Fajarningrum, Fitri Fathunajah Elsha C. Fathunajah Elsha Christalianingsih Hana Rosyida Heningtyas Heningtyas Icha Khaerunnisa Ika Kurnaiwati Ika Kurniawati Ilqia Rahma, Ilqia Rahma Imdadu Rohman Indar Mery Sulya A. Intifadhah, Sahara Hamas Ira Maya Fathonah Jannah, Dea Mutiara Juwita Nur Sembri Khaerunnisa, Icha Khafidh Nur Aziz Khoirunnisa, Salma Kholis Nurhanafi Laila Katriani Meita Aulia Sari Meita Aulia Saru Merizka Marsyelina Mery S. A., Indar Mifta Arunahul Janah Muhammad Faza Syaddad Ar-rafi Mutiara Jannah, Dea Nining Pratiwi Novi Dwi Ariani, Novi Dwi Nur Faqhina Mentari Perdhana, Radhitya Petiwi, Gofur Dyah Ayu Gilang Pratama, Irfan Rahmania Sofyana Ulya, Rahmania Sofyana Ulya Rahmawati, Zeni Restiana, Sheira Anggi Rifka Addawiyah Rosyida, Hana S. A., Indar Mery Sahirah, Firyal Nida Salma khoirunnisa Sarwi Septiana, Rena Sorayawati, Riska Susanti Susanti Susanti, Dwi Budi Syaddad Ar- Rafi, Muhammad Faza Thaqibul Fikri Niyartama Thaqibul Fikri Niyartama Ulfa Fadhilah Umar Umar Umi Habibah Widianingrum, Erlina Widyaningrum, Erlina Wuri Handayani Yosaphat Sumardi Yoshaphat Sumardi Yuni Setiawati