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All Journal EKSAKTA: Journal of Sciences and Data Analysis JFA (Jurnal Fisika dan Aplikasinya) JPSE (Journal of Physical Science and Engineering) Jurnal Penelitian Pendidikan IPA (JPPIPA) INDONESIAN JOURNAL OF APPLIED PHYSICS Journal of Physics and Its Applications JURNAL EKSAKTA PENDIDIKAN (JEP) Pelita Eksakta Journal of Innovation in Educational and Cultural Research Pillar of Physics Education : Jurnal Berkala Ilmiah Pendidikan Fisika Pillar of Physics: Jurnal Berkala Ilmiah Fisika ASEAN Natural Disaster Mitigation and Education Journal JIPI (Jurnal IPA dan Pembelajaran IPA) Journal of Experimental and Applied Physics
Syafriani Syafriani
Department Of Physics, Faculty Of Mathematics And Natural Sciences, Universitas Negeri Padang, Padang
Agriculture, Biological Sciences & Forestry Astronomy Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Control & Systems Engineering Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Environmental Science Materials Science & Nanotechnology Mathematics Physics Other

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SEISMIC RATE CHANGE ANALYSIS BASED ON SPATIAL DISTRIBUTION OF SEISMOTECTONICS IN NORTHERN SUMATRA Vicky Fikrotu Zakiyah; S Syafriani
PILLAR OF PHYSICS Vol 14, No 2 (2021)
Publisher : Department of Physics – Universitas Negeri Padang UNP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/12157171074

Abstract

The northern Sumatra has a high level of seismic activity. Before a significant earthquake occurs, there is a seismic quiescence phenomenon that precedes a significant earthquake.This phenomenon can be observed in seismic rate changes based on the spatial distribution of z-value.The data used are from the NEIC/USGS website, period 1990-2021. The study was conducted in five focus zones, three zones in the 2004 (9.2 SR), 2005 (7.8 SR) 2010 (7.1 SR) earthquake, two zones with coordinates 0.6-1.8 North Latitude and 96.8-97.6 East Longitude and zones with coordinates 3.6-4.8 North Latitude and 97.8-98.6 East Longitude. Using the z-value spatial distribution method, the region is divided into several grids. Z-value is calculated for each grid and describes the seismic rate change in the northern Sumatra. Based on the results obtained, before the 2004, 2005, and 2010 earthquake events, there was a seismic quiescence phenomenon that preceded the earthquake event. The seismic quiescence phenomenon appears afew years in early 2021 in a zone that has high seismic activity. Meanwhile, in zones that have low seismic activity, the increase seismic activity appears six years before the beginning of 2021. The spatial distribution of z-values in early 2021, there is a phenomenon of a decrease in seismic activity in several areas of northern Sumatra.
Land subsidence estimation using DinSAR method ALOS PALSAR image in Padang City West Sumatra, Indonesia Rahmi Sukmawati; Mirza Muhammad Waqar; - Syafriani; - Yohandri; Joshapat T. Sri Sumantyo
PILLAR OF PHYSICS Vol 14, No 1 (2021)
Publisher : Department of Physics – Universitas Negeri Padang UNP

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (921.497 KB) | DOI: 10.24036/10673171074

Abstract

Land subsidence is a phenomenon that occurs in big cities around the world and in Indonesia. Padang as one of the largest cities in West Sumatera also facing land subsidence due to natural phenomena and human induced. Padang City is located at the west coast of Sumatera Island which is the junction point of three active plates that cause frequent earthquakes. Main goals of this research are to know the distribution of area affected by land subsidence, to know the estimated value of land subsidence and to know the value of the velocity of land subsidence in Padang area using DInSAR method. The data used in this study is ALOS PALSAR Image Level 1.1 of Padang city during 2007 to 2010 was obtained through JMRSL CERES Chiba University, Japan and collected through Alaska Satellite Facility website. Differential Interferometric Synthetic Aperture Radar (DInSAR) is a technique considered to be one of the most efficient technique for detecting land subsidence. The DInSAR method is used in mapping altitude changes developed into a land-subsidence map each year. The mapping results show the distribution of the areas affected by the maximum land subsidence in Padang area of West Sumatera are Padang Utara, Nanggalo, and Padang Barat Subdistricts. The land subsidence insignificant occurred is Padang Selatan and Lubuk Begalung Subdistricts. The estimated value of the land subsidence distribution in Padang area using DInSAR method has decreased significantly after the earthquake of September 30, 2009 in Padang Utara, Nanggalo and West Padang Subdistricts is around 0 - 32.70 cm, and the value of land subsidence velocity is around 0.13 - 12 cm/year. One of the expected effects of land subsidence can be increased in the area susceptible for flooding in Padang city.
Studi percepatan tanah maksimum wilayah Sumatera Barat dengan metode NGA (Next Generation Attenuation) (Study of the maximum soil acceleration of the West Sumatra region using the NGA (Next Generation Attenuation) method ) Sandra Gusdalina; - Syafriani; - Ma’muri
PILLAR OF PHYSICS Vol 11, No 2 (2018)
Publisher : Department of Physics – Universitas Negeri Padang UNP

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (605.463 KB) | DOI: 10.24036/4642171074

Abstract

West Sumatera is an earthquake prone area because it is in the active subduction zone between the Indo-Australian plate and the Eurasian plate. In addition, West Sumatera is also traversed by the Sumatera fault system, which consists of four active fault segments, namely the Sumpur segments, the Sianok segment, the Sumani segment and the Diffi segment. From every earthquake that occurs in a place will cause a value of ground acceleration. The maximum ground acceleration value can be determined by direct measurement using Accelerograph or by attenuation formulation such as the Fukushima and Tanaka attenuation formulation (1990) and the Patwardhan attenuation formula. The data used in this study is the PGA Accelerograph value recorded in the February 2013-December 2017 period at the Padang Panjang BMKG. The magnitude used is 3.3-6.2SR and its depth is 2-218 km. the calculated PGA value using the attenuation formula will be compared with the PGA value from Accelerograph. Data processing is done by using three sensors namely Sta. sensor Geof. Padang Panjang. Sta. Met. Ketaping and Sta. Mar Teluk Bayur Padang. Based on the three sensors, the PGA value is calculated based on the formulation of Fukushima and Tanaka (1990) and Patwardhan attenuation according to the coordinates of each sensor. After obtaining the PGA value, the calculation of the attenuation formula was compared with the PGA value recorded by Accelerograph. From the three sensors, it was found that the PGA value calculated using the Fukushima and Tanaka formula (1990) approached the PGA value of Accelerograph. So the formulation of Fukushima and Tanaka (1990) is used to find the value of PGA in the West Sumatera region. Based on the formulation of the Fukushima and Tanaka (1990) attenuation, the city or district was obtained. Which has the highest PGA value in Kab. Mentawai Island. This is because the earthquake that occurs has a shallow depth and distance of earthquake sources close to kep regency Mentawai.
Magnetic Susceptibility of Volcanic Rocks from Pahae Julu Region, North Sumatera Province Nurmala Dewi Siregar; Hamdi Rifai; Syafriani Syafriani; Ahmad Fauzi; Fatni Mufit
Journal of Physics and Its Applications Vol 4, No 2 (2022): May 2022
Publisher : Diponegoro University Semarang Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jpa.v4i2.13597

Abstract

Pahae Julu is a sub-district located in North Tapanuli Regency, North Sumatra. This area is often found with volcanic material from the eruption of Mount Toba (Youngest Toba Tuff). The Youngest Toba Tuff eruption occurred ~74,000 years ago with a volume of 2,800 km3. When there is an eruption, the lava on the earth's surface undergoes a relatively fast freezing process to form volcanic igneous rock. These rocks contain various minerals, one of which is magnetic minerals that can be used as a track record of volcanic processes from Mount Toba. However, no document records the magnetic susceptibility value of the Youngest Toba Tuff volcanic rock in the Pahae Julu area. This research aimsbfor knowing the abundance of magnetic minerals by the low-field magnetic susceptibility. To achieve this goal, the rock magnetism method is used. This way is very effective, cheap, sensitive, and non-destructive. Magnetic susceptibility measurements are done using the Bartington Magnetic Susceptibility Meter MS2B sensor. Rock samples analyzed are pumice which is the result of the Youngest Toba Tuff eruption. The results showed that the magnetic susceptibility value obtained for the sample was between 85.0 x 10-8m3/kg – 183.1 x 10-8m3/kg with an average of 119.78 x 10-8m3/kg. Based on this value, it is assumed that the magnetic mineral properties are Antiferromagnetic. The average value of χ fd% obtained is 0.95%, indicating that the Youngest Toba Tuff volcanic rock in the Pahae Julu area has almost no Superparamagnetic grains.
Efektivitas Pengembangan LKPD Fisika SMA/MA Berbasis Inquiry Training Untuk Meningkatkan Kemampuan Berpikir Kreatif Peserta Didik Rumi Yuliska; Syafriani Syafriani; Ramli Ramli
JURNAL EKSAKTA PENDIDIKAN (JEP) Vol 4 No 1 (2020): JEP : Jurnal Eksakta Pendidikan
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/jep/vol4-iss1/428

Abstract

Effectiveness is the level of suitability and success in the use of inquiry training worksheets in the learning process. The purpose of this study is to investigate the effectiveness of a Student Worksheet. The subjects of this study were 28 students and 1 teacher. This type of data is primary data. The result of effectiveness is marked by an increase in knowledge competency with a gain score of 0.64 which is categorized as moderate. The assessment of attitudes competency average attainment of 84.88% and assessment of creative thinking abilities in the very creative category at the third meeting with an average of 81.19. It can be concluded that the Student Worksheet developed was effective.
Validitas E-Modul Fisika SMA Berbasis Inkuiri Terbimbing Terintegrasi Etnosains untuk Meningkatkan Kemampuan Berpikir Kreatif Peserta Didik Cici Dwi Tisa Haspen; Syafriani Syafriani; Ramli Ramli
JURNAL EKSAKTA PENDIDIKAN (JEP) Vol 5 No 1 (2021): JEP (Jurnal Eksakta Pendidikan)
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/jep/vol5-iss1/548

Abstract

The creative thingking ability of students in high school is still very low. This is due to the ina dequate use of teaching materials. The teaching used are still using printed modules and do not contains steps in the learning model that direct students to be able to improve their creative thingking skills. One of the solutions to improve student’s creative thinking skill in physics learning is to use –electronic mod- ule (e-module). The e-module which is equipped with a Guided Inquiry Learning Model and Integrat- ed Ethnoscience is a suitable combination to increase creative thinking skills. Through the e-module, students are able to learn independently with the help of ethnoscience in their neighborhood. This study aims to determine the level of validity of the e-module physics based Guided Inquiry Integrated eith Ethnoscience to improve student’s Creative Thinking Skills. The type of research is Research and Development (RnD) with the ADDIE development model. But, in this research is limited to the devel- opment stage. Because, this research only to see the validity of the product. The instrument used was a validation sheet in the form of an assessment questionnaire by three validators. The data analysis technique used is Aiken V formula. The result validation of e-module an average of 0,83 with the valid category. From the validation results it can be said that Physics e-modul based on guided inquiry in- tegrated with ethnoscience to improve students creative thinking skills meets the valid criteria.
Praktikalitas dan Efektivitas Penggunaan E-Modul Fisika SMA Berbasis Guided Inquiry Terintegrasi Etnosains untuk Meningkatkan Berpikir Kritis Peserta Didik Rudi Kurniawan; Syafriani Syafriani
JURNAL EKSAKTA PENDIDIKAN (JEP) Vol 5 No 2 (2021): JEP (Jurnal Eksakta Pendidikan)
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/jep/vol5-iss2/572

Abstract

Starting from the lack of students' ability to analyze problems in learning. Given the demands of the times and the Covid-19 pandemic. The teaching materials needed are in the form of electronic modules based on guided inquiry learning models and integrated with ethnoscience, to improve students' critical thinking skills. This e-module supports an independent learning process that can guide students to carry out investigations independently of problems that can be in the form of cultural and customary elements around students, to improve students' critical thinking skills. This research was conducted using the ADDIE development model, to measure the practicality level of the electronic module using a Likert scale. Measurement of the effectiveness of the aspects of knowledge, skills, and attitudes was carried out using the t-test and the Man Whitney U test. The results were obtained from the development of guided inquiry-based e-modules integrated with ethnoscience to improve practical and effective critical thinking skills.
Analysis of b-Value and Peak Ground Acceleration (PGA) in West Sumatra Province using Maximum Likelihood Method and Empirical Formula (Earthquake data Period 2007-2020) Fandu Alfadilah; - Syafriani; - Hamdi; Letmi Dwiridal; Fajri Syukur Rahmatullah
PILLAR OF PHYSICS Vol 15, No 1 (2022)
Publisher : Department of Physics – Universitas Negeri Padang UNP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/12553171074

Abstract

West Sumatra Province has four active fault segments, namely part of the Sumatran fault zone which causes frequent earthquakes. Therefore, it is necessary to research b-value analysis and PGA in the province of West Sumatra by using the maximum likelihood method and empirical formula for earthquake disaster mitigation efforts. This study aims to determine the b-value associated with rock stress and PGA as the level of earthquake activity and analyze the distribution map. The data used is earthquake data for the period 2007-2020 with a magnitude ≥ 5 SR and a depth of ≤ 100 km. The results of data processing produce a map of the distribution of b-value and PGA in the province of West Sumatra. The b-value in each region ranged from 0.8421-1.4477. Based on the b-value distribution map, the area that has the smallest b-value is in region 6, while the largest value is in region 2. A low b-value correlates with high rock stress conditions. This value illustrates that area 6 has a high chance of a major earthquake occurring. Furthermore, the calculation of the PGA value refers to the general form of Lin and Wu's empirical equation to obtain a new empirical formula model. The value of the coefficient a=−1.20543, b=−0.839093, and c=6.88858. The PGA value of West Sumatra province ranges from 10.87-376.98 gal. The city/regency with the largest PGA value is in the Mentawai Islands Regency, which ranges from 84.11-328.17 gal and the lowest value is in Dharmasraya Regency, which is between 10.87-35.28 gal.
Analysis of Soil Acceleration in The Mentawai Region with The Method Probabilistic Seismic Hazard Analysis (PSHA) Matias Adam Canny Calvary Laia; - Syafriani
PILLAR OF PHYSICS Vol 15, No 1 (2022)
Publisher : Department of Physics – Universitas Negeri Padang UNP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/12493171074

Abstract

The Mentawai Islands are one of the areas that are active in seismicity. An earthquake measuring 7.2 on the Richter scale on October 25, 2010 resulted in many casualties and material losses. Many buildings collapsed and facilities were damaged so that space managers needed a seismic hazard map to be able to organize the space by considering the disaster aspect. This prompted researchers to conduct research aimed at making seismic hazard maps and knowing the level of earthquake hazard in the Mentawai region. Seismic hazard maps are useful in planning earthquake-resistant buildings and can describe the effects of earthquakes at a location which will help in anticipating community preparedness and earthquake disaster mitigation efforts. Seismic hazard data processing uses the Probabilistic Seismic Hazard Analysis (PSHA) method. PSHA is based on earthquake parameters that produce the largest ground motion. The magnitude of the intensity at a location due to an earthquakein the earthquake source area with a magnitude of M and a distance of R, the attenuation function can be used. The attenuation functions in this study are Joyner-Boore (1997) and Young et al (1997). This type of research is descriptive, namely by collecting NEIC/USGS earthquake catalog data for the period 1950 - 2021 with M 5 SR.The results of this study indicate that the area of ywhich has a high level of seismic hazard is found in the Siberut area with a maximum PGA range of 1.17 g - 3.70 g. The area with a low seismic hazard level is the Pagai area with a PGA range of 0.80 g - 2.86 g. This result represents a 10% chance of being exceeded in 50 years.
Comparison Study Of Measurement Results Between Rain Gauge 7052.0100 and Optical Rain Gauge 815 at Lapan Kototabang Ulfa Fadhilah; - Asrizal; - Yohandri; - Syafriani; Ridho Pratama
PILLAR OF PHYSICS Vol 15, No 1 (2022)
Publisher : Department of Physics – Universitas Negeri Padang UNP

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/12529171074

Abstract

In general, the population in Indonesia is a farmer. This causes farmers to need information about the weather to carry out agricultural activities. One way to obtain information about the weather is to use the Rain Gauge instrument. In this study, the Rain Gauge instrument at LAPAN Kototabang from 2020 to 2021 was compared with the Optical Rain Gauge instrument. This research uses descriptive research with secondary data in the form of rainfall intensity data that has been measured on the Rain Gauge and Optical Rain Gauge from LAPAN Kototabang. This research was conducted to analyze the output data from the Rain Gauge and Optical Rain Gauge in the form of rainfall intensity, rainfall accumulation, and time. From the data analysis, two results can be stated from this research. First, the analysis of the rainfall parameter data that has been processed shows that the rainfall in Kototabang in January - October 2020 and 2021 has a high rainfall value. This causes the intensity of rainfall in Kototabang to be categorized as heavy rain. The two accumulations of rainfall in 2020 and 2021 in the Kototabang area are 497.031 mm and 0.602 mm using the Rain Gauge. While the measurement using Optical Rain Gauge rainfall intensity is 0.207 mm and 0.221 mm. This proves that the intensity of rainfall in 2020 is greater than the intensity of rainfall in 2021.
Co-Authors - Afrizal - Asrizal - Asrizal - Hamdi - Hamdi - Mandasari - Ma’muri - Nizamullah - Yulkifli Adya Mustika Sari Ahmad Fauzi Akmam Akmam Alif Yulanda Putri Andiyansyah Sabarani Angeline Chika Rorensia Asrizal Azmi Renaldi Renaldi Alrahmadana Caroline Bouvet De La Maisonneuve Cici Dwi Tisa Haspen Dessy Ratnasari Elsa Okta Memori Elsa Yanfatriani Fajar Akmal Fajri Syukur Rahmatullah Fajri Syukur Rahmatullah Fandu Alfadilah Fanny Rahmatina Rahim Fatni Mufit Festiyed Fitri Anggriani Francesca Forni Furqon Dawam Raharjo Furqon Dawam Raharjo Hamdi Arifin Hamdi Rifai Hidayati Hidayati Ika Sri Fahmi Ilham Akbar Jeffrey Anthony G. Oalmann Joshapat T. Sri Sumantyo Letmi Dwiridal Lingga Ayunda Pradipta Marcus Phua Matias Adam Canny Calvary Laia Meisyarah Nabillah Mirza Muhammad Waqar Mohamad Ramdhan Mona Berlian Sari Mudzullah Rajif Muhammad Reza Iswara Muslim Buldan muthia puteri amarda Nadya Fitra Kurnia Nofi Yendri Sudiar Nurmala Dewi Siregar Nurul Hazwani Putra, Amali Rahmat Triyono Rahmi Sukmawati Ramli Ramli Ratna Mila Ridho Pratama Riza Azriyanti Rizaldi Putra Robby Hendra Romadiana Dwi Rudi Kurniawan Rumi Yuliska Sandra Gusdalina Steffen Eisele Suaidi Ahadi Suaidi Ahadi Theja Lufiandi R Thomas Hardy Titin Agustina Ulfa Fadhilah Vicky Fikrotu Zakiyah Wahyuni Satria Dewi Weni Oktavia Westi Widia Wati Westi Widia Wati Yenni Darvina Yogi AlFajar Yohandri Yurnetti Yurnetti Zaimi Netrisa