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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

Author-ID : 2756514

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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Analysis of Ground Shear Strain (GSS) district Kawalu Tasikmalaya with HVSR method using microtremor data Muhammad Reza Iswara; - Syafriani; Thomas Hardy
PILLAR OF PHYSICS Vol 13, No 2 (2020)
Publisher : Department of Physics – Universitas Negeri Padang UNP

Tasikmalaya is one of the areas affected by the earthquake. One of efforts to reduce the impact of the earthquake is by analyzing seismic hazard levels as one of the earthquake disaster mitigation efforst with the microtremor method. It can determine the amplification value and the dominan frequency. From the dominant frequency value and amplification can be calculated. Seismic vulnerabilities index (Kg) and value of Ground Shear Strain (GSS). From the value of vulnerability index (Kg) and ground shear strain (GSS) can be known how much the level of vulnerability of the area to earthquakes. Furthermore, a spatial description of the distribution map of the seismic vulnerability index (Kg) and the ground shear strain value distribution map (GSS) were made in Kawalu Subdistrict, Tasikmalaya City. The dominant frequency value is obtained from 0.6 Hz to 16.7 Hz. The seismic vulnerability index (Kg) from Kawalu Tasikmalaya ranges from 0.2 to 20, and the GSS value from the low is 0.17 in the village of Urug to the highest of 12.13 in the village of Leuwiliang. This allows Kawalu Subdistrict to get a deformation phenomenon such as liquefaction, landslides when earthquake.

Analisa komparatif percepatan tanah maksimum akibat gempabumi M6.3 di Selat Mentawai berdasarkan rumusan empiris Ground Motion Prediction Equation (GMPE) (Comparative analysis of the maximum ground acceleration due to the M6.3 earthquake in the Mentawai Strait based on the empirical formula of Ground Motion Prediction Equation (GMPE) ) Fitri Anggriani; - Akmam; - Syafriani
PILLAR OF PHYSICS Vol 11, No 1 (2018)
Publisher : Department of Physics – Universitas Negeri Padang UNP

The ground motion intensity caused by an M 6.3 earthquake that struck Mentawai Strait on September 1st, 2017 with epicenter -1.24 N and 99.75 E and depth 58 km were recorded on BMKG’s seismic and intensity network, the intensity was about III - IV intensity scale (MMI) and the acceleration was 2.8 g. The earthquake intensity calculation in Indonesia can also be calculate by using Ground Motion Prediction Equation (GMPE) such as Si and Midorikawa (1999), Mc Guire (1963), Donovan (1973) and Wu et al (2003) empirical equations. We conducted a research to compare the peak ground acceleration calculation between using empirical equation and by using data observed on BMKG’s intensity networks. The PGA result on every district of Sumatera Barat Province that shown on BMKG’s shakemap has a significant different comparing with the calculation using the equations. The PGA values by using the empirial equations were decayed through the hipocenter distance of the earthquake in every district of Sumatera Barat Province. Meanwhile base on the observed one, we found some anomalies of PGA value on some BMKG’s accelerograph station networks i.e. PDSI in Padang and PAPA in Padang Panjang with 14.35 g and 5.07 g respectively. But these anomalies were not impacted to the result of the intensity, because they have some filters that can elimunate these kind of anomalies to conduct an accurate result.

Analisis nilai percepatan tanah maksimum di wilayah Sumatera Barat menggunakan persamaan empiris Mc Guire, Si and Midorikawa dan Donovan (The analysis of the value of the maximum ground acceleration in the West Sumatra region uses the empirical equation of Mc Guire, Si and Midorikawa and Donovan) Romadiana Dwi; - Syafriani; Andiyansyah Sabarani
PILLAR OF PHYSICS Vol 11, No 1 (2018)
Publisher : Department of Physics – Universitas Negeri Padang UNP

We counducted peak ground acceleration analysis caused by the earthquakes that occurred on West Sumatera on February 2008 until September 2016. We compared the acceleration calculation between some empirical attenuation equation i.e. McGuirre (1963), Si and Midorikawa (1999) and Donovan (1973) with the observed data using ETNA Accelerograph at BMKG Padang Panjang Geophysical Station. We clustered the magnitude with M 1.5 to 3.0 SR, 3.1 to 5.0 SR, 5.1 to 7.0 SR and M 7.1 to 8.1 SR to gain the result of PGA differences between empirical equation with the observed data. The first cluster with M 1.5 to 3.0 SR found that the value of PGA Si and Midorikawa approach PGA Accelerograph value at a distance of hiposenter <30 km. The second cluster with M 3.1 to 5.0 SR found that the PGA values obtained using empirical formulas approximate the PGA values recorded by the Accelerograph tool. There was a significant change in the PGA Accelerograph value with a distance of ± 20 km hyposenter. Because there is damage to the Accelerograph tool when recording the earthquake. M 5.1 to 7.0 SR cluster explained that the value of PGA obtained from the calculation approach PGA Accelerograph value at a distance of hiposenter> 350 km. The value of PGA Si and Midorikawa in cluster with M 7.1 to 8.1 SR approaches PGA Accelerograph value at hyposenter distance <600 km.

MAPPING OF THE PEAK GROUND ACCELERATION AND EARTHQUAKE INTENSITY IN PADANG CITY USING EMPIRICAL FORMULATION WITH ACCELEROGRAPH DATA VALIDATION Adya Mustika Sari; - Syafriani; Fajri Syukur Rahmatullah
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: 10.24036/12134171074

The city of Padang is an area severely affected by the earthquake that occurred in the Subduction zone. Earthquakes with large magnitudes greatly affect the damage to buildings, one of the factors that can determine the size of the damage is the peak ground acceleration. The peak ground acceleration and earthquake intensity in Padang City can be calculated using an empirical formula. The research area is on the grid with a distance of 0,02°, in order to obtain 196 calculation points. The empirical formula used is Mc. Guire, Si and Midorikawa, Fukushima-Tanaka, and Donovan which were validated with peak ground acceleration data from accelerographs so as to produce an appropriate empirical formula used to calculate the peak ground acceleration value in Padang City. From the validation process it was found that the Fukushima-Tanaka formula is the appropriate formula used to calculate the peak ground acceleration value in the city of Padang with the lowest average error percentage. The results of the calculation show that the highest peak ground acceleration value is in Bungus Teluk Kabung District, which is 69-73 gal, while the lowest peak ground acceleration value is in Koto Tangah District, which is 60-65,5 gal. Based on the peak ground acceleration value, it is known that the intensity of the earthquake in Padang City has a scale of VI MMI.

Analisis tingkat kerentanan seismik di Sumatera Barat berdasarkan nilai percepatan tanah maksimum dan intensitas maksimum (periode data gempa tahun 2007-2017) (Analysis of the level of seismic vulnerability in West Sumatra based on the value of maximum ground acceleration and maximum intensity (earthquake data period 2007-2017) ) - Mandasari; - Syafriani; Rahmat Triyono; Robby Hendra
PILLAR OF PHYSICS Vol 11, No 2 (2018)
Publisher : Department of Physics – Universitas Negeri Padang UNP

A research on seismic vulnerability analysis in West Sumatera has been conducted based on maximum land acceleration and maximum intensity (Earthquake Data Period 2007-2017). This study used the empirical formulation of Mc.Guirre, Si and Midorikawa and Donovan to find the maximum ground acceleration value and the empirical formula of Murpy O’Brien was used to calculate its maximum intensity. The reference point used to calculate the maximum land acceleration value and the maximum intensity with 19 districts/cities in the region of West Sumatera. The research data used are data of earthquake recorded in BMKG Padang Panjang from February 2007 until December 2017 located in West Sumatera region with coordinated 3030’LS-0054’LU and 960BT-1020BT. Earthquake magnitude used in 5.0 SR-8.1 SR with 10-208 km depth of earthquake. Determining the seismic susceptibility level based on the calculation of maximum land acceleration and maximum intensity value using Mc.Guirre empirical formula ranges from 24.93 Gal-138.79 Gal and its maximum intensity V MMI-VI MMI. For the empirical formula of Si and Midorikawa the maximum ground acceleration value ranges from 13.50 Gal-348.31 Gal and its maximum intensity V MMI-VIII MMI. As for the empirical formula of Donovan the maximum land acceleration value is 6.04 Gal-34.47 Gal and itsmaximum intensity ranges from III MMI-V MMI. Based on the calculation of the three empirical formulation used, the level of seismic vulnerability in Sumatera region that has the highest value based on the maximum land acceleration value and maximum intensity is in the Kep. Mentawai region is at a very large risk level one.

Struktur batuan pascalongsor menggunakan metoda geolistrik tahanan jenis konfigurasi Wenner (The post-landslide rock structure uses the Wenner configuration resistivity geoelectric method ) - Nizamullah; - Akmam; - Syafriani
PILLAR OF PHYSICS Vol 11, No 1 (2018)
Publisher : Department of Physics – Universitas Negeri Padang UNP

Malalak was located in Sumatra active fault segment that Sianok Segment. This condition caused Malalak prone to landslide hazard. Landslides a natural disasters which can lead to loss of either life or property. Based on local conditions, it need to do research the geological rock types making up Malalak. The objective this research was to find resistivity and structure of rock. The research that used was basic research descriptively. Measurements were made using the Geoelectrical resistivity method Wenner configuration. The interpretation of the data was used Software Res2dinv to get resistivity and depth of rocks in 2D model cross section below the earth surface. Result of this research indicated the type of rocks in Malalak were Clay, Porphyrite, Limestone, Andesite, and Granite. Resistivity approach was derived from the five tracks were, Clay haved resistivity 9,93 Ωm – 77,3 Ωm, Porphyrite 77,4 Ωm – 216 Ωm, Limestone 216,1 Ωm – 1050 Ωm, Andesite 1050,1 Ωm – 3533 Ωm and Granite 3533,1 Ωm – 5217 Ωm.

Analysis of Seismic Hazards and Vulnerability throughout Indonesia Based on 1999-2003 Earthquake Data Using the Microseismic Method muthia puteri amarda; - 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: 10.24036/11929171074

Indonesia is an archipelagic country that has a complex geological structure. Its location at the confluence of three plates, namely the Eurasian plate, the Indo-Australian plate, and the Pacific plate causes high tectonic activity. This seismic activity causes high seismicity levels, especially along the subduction zone. An earthquake with a large magnitude can occur and cause a high level of damage, so it is necessary to know about the language of earthquake resistance. Earthquake vulnerability is useful for mitigating earthquakes that will occur so that people are more alert to earthquake disasters that can occur anytime and anywhere. This research is a descriptive type of research, namely by collecting data on the JINSET (Japan Indonesian Seismic Network) earthquake catalog in 1999-2003 with M greater than 5 S.R. Earthquake hazard data processing using geopsy software for HVSR analysis. The horizontal component data is divided by the vertical component in the frequency domain so that the H/V value is obtained.

HAZARD SEISMIC ZONATION ANALYSIS OF WEST SUMATRA REGION USING PROBABILISTIC HAZARD SEISMIC ANALYSIS (PHSA) METHOD Mudzullah Rajif; Syafriani Syafriani
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 | DOI: 10.24036/10753171074

Indonesia is one of the countries that is prone to high intensity seismicity, where Indonesia is located between three main plates, namely the Eurasian plate in the north, the Indo-Australian plate in the south and the Pacific plate in the northeast. As a result of the meeting of the three plates, Indonesia has a high level of seismicity both on land and at sea. One of the provinces with a high level of earthquake hazard is West Sumatra. Seismic hazards are useful in designing 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. This type of research is descriptive, namely by collecting catalog data for the NEIC / USGS earthquake with the period 1969-2019 with M ≥ 5 S.R. Seismic hazard data processing uses the probabilistic seismic hazard analysis (PSHA) method. PSHA is based on earthquake parameters that produce the greatest ground motion. The magnitude of the intensity at a location due to an earthquake in the earthquake source area with a magnitude M and a distance of R can be used as an attenuation function. The attenuation function used in this study is Joyner-Boore (1997) and Young et al (1997). The results show that the largest seismic hazard occurs in the PGA with a maximum range of 1.28 g - 3.69 g in the Mentawai Islands region. The seismic hazard level is in the Bukit Barisan area with a maximum PGA value of 1.72 g - 2.12 g.

Pemetaan bahaya gempabumi deterministik dengan pendekatan Peak Ground Acceleration (PGA) di Kota Padang (Mapping of deterministic earthquake hazards using the Peak Ground Acceleration (PGA) approach in the city of Padang ) Zaimi Netrisa; - Syafriani; Rahmat Triyono; Hamdi Arifin
PILLAR OF PHYSICS Vol 11, No 2 (2018)
Publisher : Department of Physics – Universitas Negeri Padang UNP

Indonesia is passed by three plates of the E urasia plate, the Indo-Australin plate and the Pasific plate. Along the west of Sumatera, south of Java, south of Nusa Tenggara, ending in the Banda Sea, the Eurasia plate and Indo-Australian plate, the Eurasia plate and the Pasific plate in the Maluku Sea and ending in the Banda Sea. West Sumatra’s mainland section has occurred a significant and damaging earthquake of 6time. The city of Padang is adjecent to the Indo-Australian plate meeting and the Eurasian Plate. DSHA method basically aims to develop an earthquake scenario that is determined by the distance ang magnitude that affect the location. The resulting ground vibration with the predetermined earthquake event parameters is than calculated using the attenuation equation in some cases. DSHA has a basic concept to determine the ground motion parameters by using the maximum earthquake magnitude and distance of earthquake source closest from the point of obsevation. Based on the mapping results on th map of Padang City has the level of prone divided into three categories of danger that is small, medium and large denger and soil conditions are soft, medium and hard. Minor hazard are in BRI, SMO dan ADS. The danger is in Lap.Imam Bonjol, GOV and Kampung Cina and great danger of being in GOR,UNP, APT, SRC, ORG and CMN. The PGA value is proportional to the differene in soil. The greater the value of PGA then the greater the intensity caused by the earthquake. In this study instead,

Analisis anomali ketinggian semu (h'F) lapisan ionosfer sebagai prekursor gempa bumi sumatera (Analysis of the pseudo height anomaly (h'F) of the ionosphere as a precursor to the Sumatran earthquake) Ilham Akbar; - Syafriani; Muslim Buldan; - Afrizal
PILLAR OF PHYSICS Vol 12, No 2 (2019)
Publisher : Department of Physics – Universitas Negeri Padang UNP

Sumatra is an area prone to earthquakes, this is caused by a complex Sumatran tectonic system. Therefore, research is needed that aims to determine earthquake precursors as a disaster mitigation effort based on anomalies that occur in the ionosphere by observing pseudo anomalies (h’F) of the ionosphere before the earthquake. The research is a descriptive study by analyzing the ionosphere anomaly h'F, where the earthquake used as the sample of this study is an earthquake that has a magnitude ≥ 7 SR, where observations of ionospheric F layers can be done by utilizing ionosonda which has been installed in the Atmospheric and Space Observation Center (BPAA) Agam, to ensure that anomalies occur are not caused by external factors, the observations are also made through the DST Index. Based on the research that has been done, it is found that the correlation of magnitude to the anomaly h'F is positive or directly proportional. This is indicated by the emergence of a significant deviation of h'F value 7 days before the earthquake event so that observations of the h'f anomaly of the ionosphere layer are recommended as earthquake precursors. Based on the precursors that have been observed, the precursors were observed in the Aceh earthquake on 4, 6, 7 and 9 April 2012. The precursors in the Mentawai earthquake on 18 and 19 October 2012 and the Bengkulu earthquake precursors on 7 and 10 September 2007.

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

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