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All Journal Kappa Journal RADIAL: JuRnal PerADaban SaIns RekAyasan dan TeknoLogi Jurnal Doppler Jurnal Fisika dan Terapannya Jurnal Pendidikan, Sains, Geologi, dan Geofisika (GeoScienceEd Journal) Jurnal Abdimas Maduma ASEAN Natural Disaster Mitigation and Education Journal Jurnal Geologi dan Sumberdaya Mineral (Journal of Geology and Mineral Resources) Science: Indonesian Journal of Science World Health Digital Journal (wolgitj) RADIAL: Jurnal Peradaban Sains, Rekayasa dan Teknologi
Syafriani
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Analisis Momen Tensor dan Mekanisme Fokus Gempa di Sumatera Barat Menggunakan Metode Inversi Waveform Putri, Zakiah Putri; Syafriani; Akmam; Letmi Dwiridal
JFT : Jurnal Fisika dan Terapannya Vol 11 No 1 (2024): JUNI
Publisher : Universitas Islam Negeri Alauddin Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24252/jft.v11i1.42926

Abstract

Analysis of the tensor moment and focal mechanism of an earthquake aims to determine the value of the tensor moment that represents the direction of the force that causes the earthquake and the focal mechanism that describes the characteristics of the fault motion that causes the earthquake. Analysis of the tensor moment and focal mechanism is carried out using the waveform inversion method. The waveform inversion method is an inversion method that utilizes the P-wave arrival time and is estimated with a Green's function involving three seismogram components. The data used in this study are ten earthquake data in the West Sumatra region in 2007-2022 whose earthquake sources are in the Sumatra fault zone with earthquake strength ≥4.9 Magnitude. The results of this study obtained a range of tensor moment values, namely M11 = -2.595 to -4.555, M22 = 1.743 to 4.476, M33 = 0.853 to 0.079, M12 = 6.258 to -4.814, M31 = 1.241 to 0.719, M32 = 0.530 to -1.436, and the results of the focus mechanism obtained are strike-slip patterns.
FAKTOR-FAKTOR YANG BERHUBUNGAN DENGAN PARTISIPASI WANITA PASANGAN USIA SUBUR MENJADI AKSEPTOR KB Afiah; Syafriani; Fitria Meiriza
Jurnal Doppler Vol. 6 No. 1 (2022): Jurnal Doppler
Publisher : Universitas Pahlawan Tuanku Tambusai

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31004/jd.v6i1.3964

Abstract

Situasi dan kondisi Indonesia dalam bidang kependudukan, kualitasnya saat ini masih sangat memprihatinkan. Berdasarkan data Survei Sosial Ekonomi Nasional (SUSENAS) 2014 dan 2015, jumlah penduduk Indonesia mencapai 254,9 juta jiwa dan akan terjadi ledakan penduduk hampir di seluruh wilayah Indonesia yang diperkirakan pada periode 2020-2030. Penelitian ini dilakukan dengan tujuan mengetahui faktor-faktor yang mempengaruhi partisipasi wanita pasangan usia subur menjadi akseptor KB di Desa langgini Wilayah kerja Puskesmas Bangkinang Kota. Desain penelitian adalah Deskriptif Analitik dengan rancangan Crossesctional. Populasi dan sampel dalam penelitian adalah seluruh wanita pasangan usia subur di Desa langgini Wilayah kerja Puskesmas Bangkinang Kota berjumlah 1100 wus. Pengambilan sampel dilakukan dengan Random Sampling yaitu sebanyak 92 responden. Alat pengumpulan data berupa kuesioner. Data ini dianalisa dengan Analisa Univariat dan Analisa Bivariat. Hasil penelitian berdasarkan uji Chi Square diperoleh hasil ada hubungan antara pengetahuan dengan partisipasi KB p value = 0,000 < 0,05, ada hubungan antara pendidikan dengan partisipasi KB p value = 0,004 < 0,05, ada hubungan antara paritas dengan partisipasi KB p value = 0,000 < 0,05, ada hubungan antara dukungan suami dengan partisipasi KB p value = 0,000 < 0,05. Hasil penelitian ini diharapkan pada semua wanita usia subur mau menjadi akseptor KB agar terciptanya keluarga yang sederhana dan harmonis dengan program KB dua anak lebih baik.
Characteristics of the Density and Magnetic Susceptibility of Pumice from the Maninjau Caldera-Forming Eruption, Indonesia Hidayatul Lisma, Rahmi; Rifai, Hamdi; Forni, Francesca; Syafriani; Ratnawulan; Gustika Yonanda; Mutiara Kusuma Febriwanti; Nur Azizah; Retna Junia; Anisa Janna; Amelia Roza Haqu
Jurnal Geologi dan Sumberdaya Mineral Vol. 25 No. 3 (2024): JURNAL GEOLOGI DAN SUMBERDAYA MINERAL
Publisher : Pusat Survei Geologi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33332/jgsm.geologi.v25i3.889

Abstract

Abtract- Lake Maninjau is a volcanic caldera formed by a volcanic eruption located in West Sumatra. This volcanic eruption threw pyroclastic materials, one of which is pumice, as far as ± 75 km from the center of the eruption. This study aims to determine density and magnetic susceptibility characteristics of pumice from maninjau caldera-forming eruptions, indonesia. The method used is the rock-magnetic method. It is used to measure magnetic susceptibility based on the distribution of volcanic material. The samples were selected from 3 different locations around Mount Maninjau with distances varying between ±12-32 km. A Bartington Magnetic Susceptibility Metre Type B (MS2B) instrument was utilised to determine the susceptibility of rocks and X-ray fluorescence (XRF) to identify rock element levels. The results of the data analysis obtained have magnetic density and susceptibility values in the NGS (Ngarai Sianok) area, which ranged from 0.67-1.77×103 kg/m3 and 4.4-826×10-8m3/kg, the LBS (Lubuk Basung) area which ranged of 0.74-1.34×103 kg/m3 and 6.6-625.4×10-8m3/kg, and the PRM (Pariaman) area, which ranged from 0.68-3.63×103 kg/m3 and 8-359×10-8m3/kg. The results showed that when sampling closer to Mount Maninjau, the pumice is characterized by dense, fresh, but very small pore size and dominated by slightly greyish white pumice with few white crystals on its surface. Therefore, the location of the pumice from Mount Maninjau has a significant influence on its characteristics, including density, magnetic susceptibility, and iron (Fe) and titanium (Ti) content. Keywords: Pumice, Density, Magnetic Susceptibility, Mount Maninjau, XRF
Analysis Of Seismic Rate Change Based On Spatial Distribution Of Seismotectonics And Deformation Extension In West Nusa Tenggara Aprimanda Mulya Rizki, Rifa; Syafriani; Amir, Harman; Zulhendra, Zulhendra
Jurnal Pendidikan, Sains, Geologi, dan Geofisika (GeoScienceEd Journal) Vol. 6 No. 1 (2025): Februari
Publisher : Mataram University

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Abstract

Wilayah Nusa Tenggara Barat memiliki aktivitas kegempaan yang tinggi. Sebelum terjadinya suatu kejadian gempa bumi, terlebih dahulu didahului oleh keadaan seismik tenang. Tujuan dari penelitian ini untuk mengetahui perubahan laju seismik yang diamati dari fenomena seismik tenang dan luas deformasi. Metode perubahan laju seismik yang digunakan adalah distribusi spasial z-value. Dan metode luas deformasi yang digunakan adalah rumusan Utsu dan Seki untuk gempa bumi M7,0 pada tanggal 5 Agustus 2018 dengan input magnitudo permukaan. Penelitian ini menggunakan data dari website USGS periode 1983-2023. Pada penelitian ini terdapat tiga zona fokus penelitian yaitu gempa bumi tahun 2009 (M6,6), gempa bumi tahun 2018 (M7,0) dan gempa bumi tahun 2018 (M6,9). Dengan menggunakan metode distribusi spasial z-value, wilayah dibagi menjadi beberapa grid. Nilai z dihitung pada setiap grid dan menggambarkan perubahan laju seismik. Fenomena tersebut dapat dilihat berdasarkan perubahan laju seismik yang telah diperoleh. Hasil yang diperoleh, pada zona pertama terjadi peningkatan aktivitas seismik sebelum gempa bumi 2009, zona kedua dan zona ketiga terjadi fenomena seismic quiescence yang mendahului gempa bumi 2018. Berdasarkan sebaran spasial z-value awal tahun 2023, terjadi fenomena penurunan aktivitas seismik di sebagian wilayah Nusa Tenggara Barat. Serta terjadi deformasi sebesar 1.091,44 km2 pada gempa bumi M7,0 tanggal 5 Agustus 2018. Hal ini patut diduga sebagai awal gejala gempa bumi di masa mendatang .
Analysis Of Seismic Quiescence Precursors Before The M7.4 Earthquake Of 28 September 2018 In Central Sulawesi Based On Seismotectonic Spatial Distribution And Earthquake Fracture Lengths zu, Zurahma; Syafriani; Dwiridal, Letmi; Zulhendra, Zulhendra
Jurnal Pendidikan, Sains, Geologi, dan Geofisika (GeoScienceEd Journal) Vol. 6 No. 1 (2025): Februari
Publisher : Mataram University

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Abstract

The Central Sulawesi earthquake with coordinates 2°30‘S -1°50’ N and 119°0'-124°20 E magnitude 7.4 in Palu, Donggala Regency on 28 September 2018. This earthquake was a significant and destructive earthquake in Central Sulawesi. A significant earthquake is preceded by a seismic quiescence. The aim of the study was to determine when the seismic quiescence occurred and seismic activity after the earthquake alongside fracture length. The method of analysis of seismic quiescence and fracture length is z-value and Wells and Coppersmith equation. Data processed with MATLAB and Zmap were 1478 events from 1983-2023. The study area is divided into several grids with sizes of 0.1°* 0.1°. The number of earthquakes included (N = 800, 700, 600, 500, 400, 300, and 200). The z-value was calculated for each grid based on the earthquake data organized in one grid and seismic activity after earthquake. The results of the analysis of the z-value calculation in each grid show of seismic quiescence before a significant earthquake. Based on the results of the spatial distribution of z-value in Central Sulawesi, the seismic quiescence preceded the 28 September 2018 earthquake event (M 7.4) by about 21 years beginning in 1990. When cut at 2019.6, there was a decrease in seismic activity again, which indicated that an earthquake would occur, so it was thought to be a trigger factor for future earthquake precursors. While the fracture length of the 7.4 Mw earthquake of 104,232 meters shows a positive correlation between magnitude and fracture length.
Estimation Of Maximum Ground Acceleration Value Based On Mentawai Earthquake Scenario Using Atkinson Boore and Zhao Khairunnissa, Shafira; Syafriani; Fauzi, Ahmad; Zulhendra, Zulhendra
Jurnal Pendidikan, Sains, Geologi, dan Geofisika (GeoScienceEd Journal) Vol. 5 No. 4 (2024): November
Publisher : Mataram University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/goescienceed.v5i4.510

Abstract

We have estimated the value and intensity of maximum ground acceleration in West Sumatra based on the Mentawai earthquake scenario by using the formulation of Atkinson Boore (2003) and Zhao (2006). This study aims to determine the PGA value of an area as the level of activity and intensity of the earthquake in West Sumatra region from the Mentawai earthquake scenario as a measure of damage caused by the earthquake and analyze its distribution. This study uses earthquake information data for the period 1900-2023 with magnitude > 7 SR and depth < 100 km and shear wave velocity model at a depth of 30 meters (Vs 30) sourced from the National Earthquakes Information Center US Geological Survey (NEIC/USGS) catalog. After that, calculations are carried out so that the estimated maximum ground acceleration value is obtained using the Atkinson Boore (2003) and Zhao (2006) formulas. The maximum ground acceleration and earthquake intensity values for each city/regency in West Sumatra were calculated with a 0.1° grid. The estimation results show that the largest values for each scenario are in Mentawai Islands and South Pesisir because those areas are close to the subduction zone. In addition, it is also influenced by the epicenter, magnitude and soil type in the region. So that the maximum ground acceleration value in West Sumatra ranges from 0.007 g - 2.117 g with earthquake intensity ranging from I - X+ MMI. This indicates that the area is vulnerable to damage if an earthquake occurs. Keywords: Earthquakes, Atkinson Boore, Zhao, PGA, Intensity
Analysis of Seismicity and Return Period of Earthquakes in South Pesisir Regency West Sumatra Province Using the Likelihood Method Husna, Azmi Asmaul; Syafriani; Hamdi; Letmi Dwiridal
Jurnal Pendidikan, Sains, Geologi, dan Geofisika (GeoScienceEd Journal) Vol. 6 No. 1 (2025): Februari
Publisher : Mataram University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/goescienceed.v6i1.589

Abstract

The South Pesisir area was one of the areas that was rocked by an earthquake on September 30, 2009. The earthquake that occurred caused damage and loss of life. Based on these conditions, the South Pesisir Regency area was identified as an earthquake-prone area. Therefore, it is necessary to research seismicity and return period in the regency. This research used the statistical likelihood method to determine the accumulated rock stress, seismcity and return period of eartquakes. The data used is earthquake data for the period 1934-2023 with a magnitude ≥4 SR and a depth of ≤300 km. The results of this research provided an overview of the seismicity and return period in the South Pesisir Regency. Seismicity was determined based on rock stress condition (b-value) and on the level seismic activity (a-value). Based on calculations showed that the a-value and b-value for the 20-year and 90-year intervals ranged between 6.16-10.9 and 0.953-2.17, respectively. Earthquakes return periods at intervals of 20 years and 90 years for the magnitude range 4.0-4.4 produced almost the same return period, namely less than one year. Meanwhile, earthquakes with magnitudes of 4.5-6 had recurrence periods ranging from 1 to 63 years.
Hubungan Pola Makan dan Penyakit Diare dengan Kejadian Underweight pada Balita di Desa Pulau Burung Wilayah Kerja Puskesmas Pulau Burung Rahayu , Sri; Afrinis, Nur; Syafriani
Science: Indonesian Journal of Science Vol. 1 No. 3 (2024)
Publisher : LPPI Yayasan Almahmudi bin Dahlan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31004/science.v1i3.96

Abstract

Underweight terjadi dikarenakan adanya masalah pola makan seperti kesalahan cara pemberian makanan pada balita dan didukung dengan adanya penyakit diare yang dialami balita. Tujuan untuk menganalisis hubungan pola makan dan penyakit diare dengan kejadian gizi kurang pada balita di wilayah kerja Puskesmas Pulau Burung. Penelitian bersifat kuantitatif dengan desain studi cross sectional. Penelitian dilakukan pada tanggal 1 Mei – 10 Juni 2024. Populasi ibu yang memiliki balita umur 24-60 bulan yang berjumlah 116 orang dengan sampel 116 oang diambil menggunakan teknik total sampling alat ukur yang digunakan timbangan BB, microtise, kuesioner, dan FFQ. Analisa data menggunakan bivariat dan univariat dengan uji chi squre. Hasil penelitian terdapat 61 balita (52,6%) dengan pola makan buruk, sebanyak 75 balita (64,7%) yang tidak mengalami diare, dan sebanyak 75 balita (64,7%) yang tidak mengalami kejadian underweight. Terdapat hubungan yang bermakna antara pola makan dengan kejadian underweight pada balita (p-value 0,001), dan terdapat hubungan yang bermakna antara penyakit diare dengan kejadian underweight pada balita (p-value 0,000). Diharapkan dapat meningkatkan pengetahuan ibu tentang pola makan pada balita dan penyakit diare sehingga dapat mencegah terjadinya kejadian underweight pada balita.
Gambaran Gangguan Pendengaran Akibat Kebisingan pada Pekerja Somel di Desa Siabu Kabupaten Kampar Tahun 2024 Syafitri, Debi; Syafriani; Kusuma, Nila
Science: Indonesian Journal of Science Vol. 1 No. 6 (2025)
Publisher : LPPI Yayasan Almahmudi bin Dahlan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31004/science.v1i6.244

Abstract

Gangguan pendengaran merupakan kondisi di mana seseorang mengalami penurunan kemampuan mendengar ini bisa bervariasi dari ringan hingga berat, dan dapat memengaruhi satu atau kedua telinga. Tujuan penelitian ini untuk mengetahui gambaran gangguan pendengaran akibat kebisingan pada pekerja somel di Desa Siabu Kabupaten Kampar tahun 2024. Desain penelitian ini adalah menggunakan penelitian deskriftif. Penelitian dilakukan pada tanggal 07,08,09, dan 10 bulan agustus tahun 2024 dengan jumlah 36 responden menggunakan total sampling. Pengumpulan data menggunakan lembar observasi. Analisa data yang digunakan adalah analisa univariat. Hasil analisis univariat diperoleh 3 (8.3%) responden yang memiliki gangguan pendengaran tuli konduktif, 25 (69,4%) responden yang memiliki gangguan pendengaran tuli sensoreunal, dan 8 (22.2%) responden dengan pendengaran normal. Kesimpulan dari 36 responden diperoleh 3 (8.3%) responden yang memiliki gangguan pendengaran tuli konduktif, 25 (69,4%) responden yang memiliki gangguan pendengaran tuli sensoreunal, dan 8 (22.2%) responden dengan pendengaran normal. Saran diharapkan kepada perusahaan agar lebih mengembangkan pelaksanaan pencegahan gangguan pendengaran akibat kebisingan.
Estimation of Earthquake Intensity and Peak Ground Acceleration in West Java Using the MC Guire and the Lin & Lee Method Resi Silvianis; Syafriani; Letmi Dwiridal; Zulhendra
Kappa Journal Vol 8 No 3 (2024): Desember
Publisher : Universitas Hamzanwadi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29408/kpj.v8i3.28095

Abstract

Abstract:  West Java province was in a subduction zone and fault zone (slip fault), which caused earthquakes. Therefore, it was necessary to research estimates of maximum ground acceleration in West Java to mitigate earthquake disasters. This research also aimed to determine the value of ground acceleration and earthquake intensity and to determine the distribution map using the McGuire method and the Lin & Lee method. The data used were earthquake data for 1950-2023 with a magnitude > 5 SR. From processing this data, the maximum ground acceleration value in West Java ranged between 10.14722-195.3540 gal, and the maximum intensity value was IV-VI MMI using the Mc Guire method. Meanwhile, for the Lin & Lee method, it ranged between 6.6512 to 49.24599 gal. Of the two methods, the largest maximum ground acceleration value was located in Cianjur Regency, which was due to its proximity to the Cimandiri fault and the geological conditions in the area.
Co-Authors AA Sudharmawan, AA Abdi Gunawan Djafar Afiah Afrinis, Nur Akmam Al Dimas F. Darkay Alif Nurrahman l. Masi Amelia Roza Haqu Anisa Janna Aprimanda Mulya Rizki, Rifa Bintang Sri Rejeki Panjaitan Defitri, Agnes Deviana Pratiwi Munthe Fanny Rahmatina Rahim Fauzi Ahmad Muda Fitria Meiriza Forni, Francesca Gustika Yonanda Hamdi Hamdi Rifai Harman Amir Hidayatul Lisma, Rahmi Husna, Azmi Asmaul Khairunnissa, Shafira Kusuma, Nila Letmi Dwiridal Mutiara Kusuma Febriwanti Nia Aprilla Nur Azizah Nurman , Muhammad Putri, Zakiah Putri Rahayu , Sri Ratnawulan . Resi Silvianis Retna Junia Syafitri, Debi zu, Zurahma Zulhendra Zulhendra Zulhendra Zulhendra, Zulhendra