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All Journal Al-Fiziya: Journal of Materials Science, Geophysics, Instrumentation and Theoretical Physics Berkala Fisika Indonesia : Jurnal Ilmiah Fisika, Pembelajaran dan Aplikasinya JOURNAL ONLINE OF PHYSICS Jurnal Terapan Abdimas Tunjuk Ajar: Jurnal Penelitian Ilmu Pendidikan JMM (Jurnal Masyarakat Mandiri) SELAPARANG: Jurnal Pengabdian Masyarakat Berkemajuan Journal of Physics and Its Applications JURNAL EKSAKTA PENDIDIKAN (JEP) JURNAL PENDIDIKAN TAMBUSAI Jurnal Ners Jurnal Pendidikan, Sains, Geologi, dan Geofisika (GeoScienceEd Journal) Journal of Health and Nutrition Research Berita Kedokteran Masyarakat Jurnal Pengabdian Masyarakat Bhinneka SEHAT : JURNAL KESEHATAN TERPADU Jurnal Medika: Medika EXCELLENT HEALTH JOURNAL Science: Indonesian Journal of Science Evidence Midwifery Journal IJoEd: Indonesian Journal on Education NuCSJo : Nusantara Community Service Journal Jurnal Ilmiah Ilmu Kesehatan Journal of Experimental and Applied Physics World Health Digital Journal (wolgitj) JIK
Syafriani Syafriani, Syafriani
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Journal : Journal of Experimental and Applied Physics

 1 
Seismic Vulnerability Index Analysis In The Sub-District Of Lake Kembar, Solok Regency, As An Effort To Determine The Potential Aslided Area Using HVSR Method Percindira, Ella Dwi; Syafriani, Syafriani; Hamdi, Hamdi; Dwiridal, Letmi
Journal of Experimental and Applied Physics Vol 1 No 1 (2023): June Edition
Publisher : Department of Physics, Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/jeap.v1i1.6

Abstract

Nagari Kampung Batu Dalam, Danau Kembar District, experienced a landslide caused by high rainfall and steep topography (slope). However, there needs to be more information regarding the classification of landslide potential levels that will occur. So it is essential to carry out this study to determine the soil type, sediment depth, and seismic vulnerability index. Ten microtremor data are scattered in this area. Measurements are carried out using an MAE Sysmatrack and 3D Seismic Surface Sensor, and this is done because these measurements are not difficult to carry out and do not require a large amount of money. However, there is an abundance of information that can be analyzed. Microtremor signal data were processed using Geopsy software with the Horizontal to Vertical Spatial Ratio (HVSR) method and soil profiles which stated the parameters of the shear wave velocity (Vs) and the depth of the sediment layer (H) using the ellipticity curve method. The results obtained show that the f0 value ranges from 0.6-4.37 Hz, the Amplification Factor ranges from 1.4-17.1, the sediment thickness (H) ranges from 24.5-240.8 m, and the seismic susceptibility index ranges from 1.72E-04 - 3.21E-02 cm/s2. Based on the mapping and modeling, it shows that alluvial rocks dominate the locations that have the potential for landslides.
Earthquake Intensity Determination Based on Maximum Land Acceleration in Padang City Area Using Atkinson Boore Method (2003) Linda Susanti; Syafriani, Syafriani; Hamdi, Hamdi; Dwiridal, Letmi
Journal of Experimental and Applied Physics Vol 2 No 1 (2024): March Edition
Publisher : Department of Physics, Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/jeap.v2i1.40

Abstract

Geologically, the city of Padang had the potential for large earthquake impacts due to its location within the Sumatran Fault, Mentawai Fault, and above the Subduction Zone. The magnitude of earthquake damage was determined by soil quality factors and earthquake intensity. To determine the extent of damage, the maximum ground acceleration value was used. This value represented the maximum ground vibration acceleration that occurred at a specific location within a particular area, resulting from all earthquakes that occurred during a specific time period. The maximum ground acceleration value and earthquake intensity in the Padang City area could be calculated using the Atkhinson Boore (2003) method. This study was a quantitative research that commenced by examining relevant theories related to the issue at hand. The research then proceeded with the collection of secondary data obtained from the United States Geological Survey (USGS) website. Specifically, earthquake data for the period between 2000 - 2020 in the Padang City area with coordinates LS- LS and BT- BT, and a magnitude M ≥ 5.0 SR depth < 100 km were utilized. Historical earthquake data was employed to determine earthquake intensity values, which were then used to assess the earthquake risk in the Padang City area. Based on the calculation results, the maximum acceleration value of soil was found between 0.519001 g- 0.603847 g. The highest value of maximum acceleration of soil was located in Bungus Teluk Kabung area, while the lowest value was found in Koto Tangah area. The distribution of earthquake intensity (MMI) in Kota Padang area has a value of VIII MMI.
Seismotectonic Analysis and Seismic Potensial of The Sumatra Region Using The Guttenberg-Richter Method Yusrila, Yoga; Syafriani, Syafriani; Hamdi, Hamdi; Dwiridal, Letmi
Journal of Experimental and Applied Physics Vol 2 No 1 (2024): March Edition
Publisher : Department of Physics, Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/jeap.v2i1.46

Abstract

Sumatera is one of the most seismically active regions in Indonesia. This is due to the presence of subduction zones and active faults that influence the plate tectonic activity of the region, resulting in many earthquake events that cause damage and loss. One of the efforts to mitigate earthquake disasters is the analysis of seismotectonic parameters, which are indicated by the a-value and b-value of the Gutenberg-Richter equation in the earthquake frequency-magnitude relationship. Low seismotectonic parameters (a-value) and (b-value) can be interpreted as low seismic activity and high local rock stress conditions, and vice versa high (a-value) and (b- value). In this study, the analysis was performed spatially and temporally from the National Earthquake Information Center United States Geological Survey (NEISUSGS) earthquake catalogue. The data obtained in the form of longitude, latitude, depth, magnitude, time and location of the earthquake event, the data are limited to M ≥ 4.0Mw and Depth ≤ 350KM in the Sumatera region with the boundaries of 6030'LU-6°30'LS and 94BT-106°BT for the period 1990-2022. Based on the estimation results of the Guttenberg-Richter method in ZMAP v6 software, the b-value is 0.92-1.04 and the a-value is 7.42-7.97, with a return period of 6.5 Mw earthquakes generally ranging from 5-25 years.
Mapping the Peak Ground Acceleration Value and Seismic Intensity in Pesisir South District Area using The Empirical Formulation of SI and Midorikawa Fauzi, Muhammad Aulia; Syafriani, Syafriani
Journal of Experimental and Applied Physics Vol 2 No 1 (2024): March Edition
Publisher : Department of Physics, Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/jeap.v2i1.47

Abstract

The South Pesisir is an area that is prone to earthquakes, because it is in a zone that is traversed by the Sumatran fault, subduction zone and Mentawai fault. The 3 earthquake zones are areas that have an active level of seismicity from which the maximum ground acceleration value and earthquake intensity can be calculated. This research aims to determine and map the peak ground acceleration and seismic intensity values ​​to support development planning and spatial planning in the South Pesisir District area.This type of research is descriptive research, namely by collecting earthquake catalog data sourced from the USGS (United States Geological Survey) in the period 1973-2023 with coordinates -2.35°S – -1.04°N and 99.32°E – 101.27°E . The magnitude used is M ≥ 5 SR and a maximum depth of 300 Km. The method used in processing the peak ground acceleration data is the empirical formulation of Si and Midorikawa attenuation, then the peak ground acceleration and seismic intensity data output is displayed with ArcGis 10.8 software.The results obtained from calculating the higgest peak ground acceleration were in Lengayang District, Air Pura District, Pancung Soal District, and Basa IV Balai Tapan District with a value of 225.53 – 526.57 gal, while the lowest ground acceleration value was in Koto XI Tarusan District , Bayang District, North Bayang District, and Silaut District with a value of 16.15 – 27.91 gal. Meanwhile, the highest seismic intensity is in Lengayang District VIII MMI and the smallest seismic intensity is in Bayang District, North Bayang District, and Silaut District, namely IV MMI.
Microzonation of Seismic Vulnerability In Padang Panjang Timur Sub-District, Padang Panjang City Based on Microtremor Measurement Elizha, Zellvia; Syafriani, Syafriani; Hamdi, Hamdi; Dwiridal, Letmi
Journal of Experimental and Applied Physics Vol 2 No 3 (2024): September Edition
Publisher : Department of Physics, Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/jeap.v2i3.70

Abstract

Padang Panjang City is one of the cities in West Sumatra which has a high level of risk of the natural phenomenon of earthquakes. This is due to the fact that it is traversed by the active Sumatran fault which can cause earthquakes at any time. The purpose of this study was to determine the value of the seismic vulnerability index in Padang Panjang Timur District, Padang Panjang City using microtremor measurements. This type of research is descriptive research, namely research that describes the symptoms or phenomena studied. The location for data collection was Padang Panjang Timur District, Padang Panjang City, West Sumatra Province. There are 15 data collection points, and the distance between points is 500 m. The microtremor method of measuring this microtremor can determine the dominant frequency value (f0), amplification factor (A0), and susceptibility index value (Kg). Microtremor data processing was used to obtain the H/V curve at each point of data collection using Geopsy software. The results of the microzonation of the seismic susceptibility index (Kg) ranged from 1.05 × 10-6 s²/cm to 170.09 × 10-6 s²/cm. High seismic vulnerability index values ​​are found in the Koto Panjang Sub-District, Tanah Pak Lambik Sub-District, Guguk Malintang Sub-District, Ngalau Sub-District and Ganting Sub-District.
Evaluation of Pumice Source from Lubuk Basung Based on Magnetic Susceptibility Values Febriwanti, Mutiara Kusuma; Hamdi, Hamdi; Fauzi, Ahmad; Syafriani, Syafriani
Journal of Experimental and Applied Physics Vol 2 No 3 (2024): September Edition
Publisher : Department of Physics, Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/jeap.v2i3.80

Abstract

Lubuk Basung is one of the distribution areas of pyroclastic material from the Maninjau Caldera eruption that occurred 50,000 years ago and produced two different types of white pumice. The research purpose is to reveal whether the pumice samples taken from Lubuk Basung come from the same eruption or not based on susceptibility of magnetic scores. The susceptibility of magnetic scores can be measured by the Rock Magnetic Method using the Bartington Magnetic Susceptibility Meter Type B. From the magnetic susceptibility values obtained, normality test, homogeneity test, and mean similarity test of two different samples were conducted using IBM SPSS Statistics software. In the LBS 23-02 sample, a susceptibility of magnetic range of 41.9 x 10-8 m3/kg to 582.2 x 10-8 m3/kg was obtained, and the LBS 23-03 DB sample obtained a magnetic susceptibility value of 42.9 x 10-8 m3/kg to 535.5 x 10-8 m3/kg. From the normality, homogeneity, and mean similarity test, it is known that the LBS 23-02 and LBS 23-03 DB samples come from a population that is not distributed normally and not homogeneous, but an average comparison is obtained with a score of significance at 0.0426, which can be concluded that the two pumice samples found in Lubuk Basung come from the same eruption source, although each sample has different types and characteristics.
Determination of the structure and crystallite size of pumice magnetic minerals from Ngarai Sianok using X-Ray Diffraction (XRD) Azizah, Nur; Hamdi, Hamdi; Syafriani, Syafriani; Dwiridal, Letmi
Journal of Experimental and Applied Physics Vol 2 No 3 (2024): September Edition
Publisher : Department of Physics, Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/jeap.v2i3.86

Abstract

The structure and size of crystal are are important aspects of magnetic minerals pumice from Ngarai Sianok  to understand the geological processes of the area. Volcanic rocks in Ngarai Sianok contain magnetic minerals with unknown crystal structures. The crystal structure and size in pumice are analyzed using X-Ray Diffraction (XRD), where the type of magnetic mineral and crystal structure are determined by comparing the data measurement with the mineral database, while the crystal size can be determined using the Scherrer equation. Magnetic minerals in pumice from Ngarai Sianok are magnetite (Fe3O4) with a cubic mineral structure, ilmenite mineral (FeTiO3) with a hexagonal structure, and hematite mineral (Fe2O3) with a rhombohedral structure. The crystal size of magnetic minerals vary. The lowest is at an angle of 18.25 with a FWHM value of 0.1279 which results in a crystal size of 62.8995 nm. The highest crystal size is at an angle of 35.46 with a FWHM value of 0.0624, resulting in a crystal size of 133.6609 nm. FWHM value is inversely proportional to the size of the crystal, meaning that the size of the crystal formed is getting smaller with increasing FWHM. The average size of pumice crystals formed in Ngarai Sianok was calculated to be 102.6392 nm, the small crystal size indicates the rapid cooling of magma, usually occurring during explosive eruptions.
Analysis Of Normal Stress Distribution Of Earthquakes In The Fault Segment Of The West Sumatra Region Using The Stress Inversion Method: English Daya, Ellen Kurniawati; Syafriani, Syafriani; Hamdi , Hamdi; Amir, Harman
Journal of Experimental and Applied Physics Vol 2 No 4 (2024): December Edition
Publisher : Department of Physics, Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/jeap.v2i4.88

Abstract

West Sumatra was one of the regions on the island of Sumatra that had a high level of earthquake proneness. There were five segments of the Sumatran fault in this region. Normal stress distribution analysis could be carried out to determine tectonic activity in earthquake-prone areas. This research used the stress inversion method to identify normal stresses, which could trigger or inhibit fractures. The data used involved 17 fault plane parameters (strike, dip, rake) from earthquakes with a magnitude of ≥4.7 that occurred in the West Sumatra region from 1967-2023. The type of fault analysed was strike-slip, and the earthquake's epicenter was located on land. The results of this research provided an overview of the position and direction of normal stress due to earthquakes in the West Sumatra region. The distribution of the normal stress position of the fault segment was shown through the pressure and tension axes (P/T), with respectively sigma1, sigma2, and sigma3 having azimuth/plunge values of 353.990/4.760, 247.260/73.860, and 85.310/15.380. The direction of maximum normal stress (sigma1) is spreading in the northern part of the fault segment. In contrast, intermediate normal stress (sigma1) is situated in the western sector of the fault segment, while minimum normal stress (sigma3) is in the eastern part of the fault segment in this region. Analysis of the normal stress distribution is showing that the Talamau segment is being dominated by maximum normal stress, indicating that the Pasaman area and its surroundings are being considered vulnerable to faults and earthquakes.
Co-Authors Adzura, Nadilla Afiah Afiah Afrinis, Nur Agustina, Mia Dwi Alini, Alini Althaf, Muhammad Mahdy Alwa, MaqhviraHusna Amelia Wulandari Ananda, Lusi Septia Andi Irfan, Andi Anggraini Dhilon, Dhini Angraini, Dela Nofri Aprilla, Nia Ari Setiawan Arifianto, Nasruhan Astuti - Astuti, Haryati Astuti, Retnaning Ayu, Febri Azilah, Fatimah Nur Azmi, Zul Cahyani, Yuyun Febri Cuyno Mellen, Renie Darma, Wiga Aulia Darwis, Nurizah Binti Mohamed Daya, Ellen Kurniawati Defita, Ermi Dessyka Febria, Dessyka Deswari, Dini Eka Saputri, Eka Eka Setiawati Elizha, Zellvia Erlinawati Erlinawati, Erlinawati Faizah, Ni’ma Tri Fauzi Ahmad Muda Fauzi, Muhammad Aulia Fayzal, Muhammad Febriwanti, Mutiara Kusuma Felayati, Felayati Fitri Aulia Fitri S, Rahmi Pramulia Florentina Simalango, Nora Gunarmi Gunarmi, Gunarmi Hamdi , Hamdi Hamdi Hamdi HAMIDI, M. NIZAR SYARIF Handayani, Riska Hardianti, Evi Harman Amir Husna, Azmi Asmaul Irinericy , Rani Isnaeni, Lira Mufti Azzahri khofi, Mohammad Bilutfikal Kusuma, Novy Oktaviandri Kusumawati, Nila Lasepa, Wanda Laxmi, Laxmi Leatari, Rizki Rahmawati Letmi Dwiridal Linda Susanti Linda Widyaningsih Lingga, Leny Julia lsmalinda, lsmalinda Mardhatillah, Dela Mesi, Mesi Miftahurrahmi, Miftahurrahmi Mubasysyir Hasanbasri Muhammad Nizar Nabilla, Agma Navelia, Zesika Intan Ningsih, Andi Pramesti Noorhayati, Ariyana Nur Azizah Nur Faizah, Ida Oktaviani, Yoneta Parasandy , Ardila Parmin, Joria Percindira, Ella Dwi Prasetya, Danny Chandra Puji Hastuti Purnamasari, Yulia Puteri, Ade Dita Putri, Minazri Eka Putri, Nadya Annisa Putri, Yura Chaniago Ramadhan, Syahwira Ramli Ramli Rejeki, Yunaji Sri Rizki Rahmawati Lestari Rizqi, Eka Roshifita S, Ayu Purnamasari Saibatul Aslamiah, Saibatul Sari, Rika Rosvita Setiawan, Dicko Silitonga, Yese Angga Marito Siti Aisyah Siti Nurhayati Siwi Padmawati, Retna Sofiana Sofiana, Sofiana Sri Hardianti Sri Widiyati, Sri Sumangkut, Aprilia Meymey Suparmin Suparmin Syamsul Bachry SYARIFA SYARIFA, SYARIFA Syarifah Aini Syarifah, Zulfa Lailatus Syukrianti Syahda Taruna, Jhon Utari, Yola Vera Diane Tombokan Viora, Dwi Wahyu Ramadhan WIJOYO, HADION Williani, Shelly Yanri Wijayanti Subronto Yendri Sudiar, Nofi Yuliska, Rumi Yusrila, Yoga Z.R, Zurahmi Zulhendra, Harman Amir Zulhendra, Zulhendra