Refrizon Refrizon

• Professor (Associate) at University of Bengkulu

Geophysical investigations were conducted in the coastal area of Seluma Regency using Multi-Channel Analysis of Surface Waves (MASW) to determine subsurface geology, material stiffness, and potential weak zones to a depth of approximately 30 m. This study aims to identify and map the susceptible areas to abrasion in Seluma Regency coastal region an...

This study, unique in its focus on the Kepahiang Regency, Bengkulu Province, aims to analyse soil characteristics and their potential impact on infrastructure stability using shear wave velocity (Vs) data from 30 microtremor points spread across Kepahiang. The analysis produces a soil layer profile, shear wave velocity variations at various depths,...

The determination of the initial of the Qomariah month is still a difference, especially in determining the initial of Ramadhan, Syawwal, and Dzulhijjah. This can happen because there are differences in the method of determination. The method is in the form of Hisab method and Rukyat method. The purpose of community service activities is to determi...

Bengkulu city, located in the western part of Sumatra, is characterized by the prevalence of alluvial deposits. In certain areas, local site effects on soft alluvial sediments such as clay, sand, silt, mud, and gravel can amplify ground movements caused by significant seismic waves. Consequently, a comprehensive site effect study was conducted with...

This study presents a map of seismic vulnerability distribution in Bengkulu City. Our study stands out for its unique approach, which begins by collecting geotechnical data from as many as 211 research locations. The analysis was conducted to obtain earthquake vulnerability values by developing an integrated approach that combines geophysical metho...

Kalimantan Highway in Bengkulu is a heavily traveled route and the main gateway to Bengkulu City from northern areas such as Arga Makmur and Ketahun sub-district, or Mukomuko regency also surrounding areas. Geological formations in the form of alluvium terraces (Qat) cause soil instability, often damaging the road surface. These include the formati...

The magnetotelluric (MT) field method is an excellent way to generate 2D resistivity cross-sections for mapping geothermal potential. One way to use magnetotellurics is to study how deep the Earth's crust is. This study uses single-point magnetotelluric (MT) measurements to look at the potential for geothermal energy. We used MT magnetotelluric mea...

This paper looks at the risks of liquefaction and microzonation in the port area of Bengkulu City after a major earthquake. The study began by collecting existing data on shear wave velocity (Vs) and included new data from measuring ambient noise to calculate Vs. The researchers also measured the actual groundwater levels on-site. They investigated...

Kecamatan Kampung Melayu, Kota Bengkulu, mengalami pertumbuhan infrastruktur yang pesat, sehingga memerlukan mitigasi bencana sejak dini. Penelitian ini bertujuan untuk memodelkan struktur bawah permukaan menggunakan data microtremor guna melengkapi data mitigasi bencana gempa bumi. Data microtremor dianalisis menggunakan metode Horizontal to Verti...

This research is essential as it discusses modelling a two-dimensional map of soil parameters in Bengkulu City, Bengkulu Province, Indonesia. The two-dimensional modelling aimed to show the distribution of soil parameter values based on the research points strategically distributed throughout Bengkulu City. These research points were chosen to repr...

ABSTRAK-Mikrozonasi seismik merupakan proses pemetaan untuk memprediksi respon tanah terhadap guncangan seismik yang dapat digunakan sebagai acuan mitigasi bencana dan pembangunan yang akan dilakukan di Kabupaten Bengkulu Selatan. Penelitian ini menggunakan data shapefile peta administrasi dan data mikrotremor sebanyak 69 titik. Data mikrotremor ke...

This paper presents geospatial modelling of soil engineering properties in Bengkulu City. The research started with a geotechnical data collection of 216 points at the study site, which consisted of five soil layers: sand, clay, soft rock, medium rock, and hard rock. Empirical analysis was conducted to obtain the values of soil engineering paramete...

Kelurahan Berkas is a coastal area in Teluk Segara Sub-district, Bengkulu Regency, Bengkulu Province. The purpose of this research is to identify the presence of groundwater in Kelurahan Berkas. The method used was resistivity geoelectric method with Wenner-Schlumberger configuration. This research applied three lines, the first in the Southwest-No...

Lebong Regency is an earthquake-prone area because it is crossed by the Sumatra and Pelabai Faults. This study aims to analyze the potential risk of earthquakes based on microtremor test data with the Horizontal To Vertical Spectral Ratio (HVSR) Method. Measurements were carried out at 106 points spread across Amen, Bingin Kuningan, Lebong Atas, Le...

Purpose: The community service activity by the University of Bengkulu Geophysics and Physics Team aimed to assist the community of Kandang Limun, Bengkulu City, by developing maps that display area boundaries and topographical elevations. The maps were intended to serve as easily accessible sources of information for the local community and to aid...

Pasar Ujung Village is located in Kepahiang District, which has the highest growth rate and population compared to other sub-districts in Kepahiang Regency, with a growth rate of 1.63% and a population of 53,066 thousand people. As one of the efforts to minimize the occurrence of damage due to earthquake disasters in Pasar Ujung Village, Kepahiang,...

Investigation of the groundwater potential in the Pulau Baai area, Kampung Melayu Sub-district, Bengkulu City, must be carried out in such a way that the activities and needs of the people in the area can be fulfilled and the needs of the population in the area can be met. This study aims to determine the status of groundwater using the Schlumberge...

Bengkulu Province, including North Bengkulu and Lebong, is located in the subduction zone of the Indo-Australian and Eurasian plates, which makes the region prone to earthquakes. This research focuses on earthquake disaster mitigation in the Lemeu area, Uram Jaya District, and Lebong Regency. It identifies areas prone to earthquake shaking based on...

Bengkulu City is situated within a subduction zone where the Indo-Australian and Eurasian tectonic plates converge, rendering the area highly susceptible to seismic activity. This study employs the microseismic method to assess seismic vulnerability and the subsurface rock structure at the Dendam Tak Sudah Lake Flyover Construction Site in Bengkulu...

The hot spring pool, Lemeu Village, Lebong Regency, is one of the geothermal fields. This research aims to identify the study area's geothermal potential and lithology. This is illustrated by the correlation method of resistivity and electrical conductivity values of rocks based on geoelectric measurements. This research uses the Wenner-Schlumberge...

Bengkulu City is the capital of Bengkulu Province, Indonesia. This city is situated adjacent to a Subduction zone and is intersected by several faults. The goals of this study are to determine the depth of the highly compacted soil layers as well as the wave velocity at a depth of 30 m (Vs30) to identify and map the area based on its mechanical cha...

This research investigates the impact of vibrations produced by blasting activities at the PT Semen Padang Mine, with a focus on vibration analysis and experimental characterization using the Micromate tool. The main objective of this research is to understand the vibrations resulting from blasting, analyze the impact of variations in PVS (Peak Vec...

Abstrak. Kabupaten Kepahiang terletak di wilayah perbatasan busur magmatik dan lempeng benua dengan lempeng samudra yang mengakibatkan munculnya beberapa manisfestasi panas bumi di permukaan berupa solfatara, fumarole, dan batuan alterasi sehingga menjadi prospek energi panas bumi. Riset yang dilakukan memiliki tujuan untuk mengetahui sebaran reser...

The accurate prediction and prevention of earthquakes remains challenging. Consequently, the primary approach to mitigate the impact of earthquakes is through disaster risk reduction efforts. One significant strategy involves conducting seismic vulnerability analyses based on disaster scenarios. This study aims to identify and map areas with varyin...

Abstrak. Provinsi Sumatera Utara merupakan salah satu provinsi yang juga sering terjadi gempa bumi, karena wilayahnya terletak pada pertemuan dua lempeng tektonik yaitu lempeng Indo-Australia dan lempeng Eurasia. Penelitian ini bertujuan untuk mengetahui perulangan gempa yang terjadi di Provinsi Sumatera Utara berdasarkan dari b-value serta kaitan...

The Central Bengkulu Regency possesses a coastline measuring 21.8 km, situated in direct proximity to the Indian Ocean. The heightened wave and ocean current dynamics possess the capacity to induce detrimental effects in the form of coastal abrasion along the coastline. This study conducted an examination of the rate of shoreline changes resulting...

This paper presents the site characteristics of the Musi Fault Zone in the Kepahiang Urban Area. The measurement using multichannel analysis of surface waves (MASW) is also conducted to obtain the preliminary ground profile and shear wave velocity. The ambient noise measurement is performed to obtain the basic geophysical information interpreted in...

South Bengkulu is prone to earthquakes because it is located on the Great Sumatran Fault. Apart from that, it is also influenced by the activity of the Musi and Manna segments, so that besides being influenced by the two active tectonic plates it is also influenced by the local segment. This research is located in Manna City and Manna Market, which...

Potensi gempa bumi yang sewaktu-waktu dapat terjadi kerap menjadi isu utama bagi pembangunan dan masyarakat. Upaya peningkatan budaya sadar bencana gempa perlu dilakukan guna memberikan edukasi dalam menyikapi bahaya gempa yang dapat terjadi di Kota Bengkulu. Kegiatan ini dilakukan dalam rangka pelaksanaan kegiatan pengabdian berbasis riset, dimana...

The rock lithology of the potential hydrothermal area has been studied using Electrical Resistivity Tomography (ERT) in Pungguk Pedaro Village, Bingin Kuning District, Lebong Regency. Field data acquisition uses a stretch length of 480 meters with the MAE X612-EM Geoelectric tool that forms a straight line. ERT method, using Res2dinvx64 software. T...

Daerah Bengkulu merupakan daerah yang dilalui oleh jalur subduksi Indo-Australia dan Eurasia. Jalur subduksi dapat teridentifikasi dengan metode gravitasi yang dapat menggambarkan bentuk bawah permukaan berdasarkan variasi medan gravitasi yang dapat dilihat oleh perbedaan rapat masa anatar batuan. Penelitian ini bertujuan untuk mengidentifikasi kar...

Concerns have been raised over the availability of water in the Dendam Lake neighborhood of Bengkulu City and the areas surrounding it. The location is characterized by a number of unsuccessful water wells. These issues are the direct and indirect results of the geological formations that are present in the region, specifically Aluvium (which consi...

South Bengkulu is one of the regencies in Bengkulu Province which is in an area of active tectonic plate activity, namely the India-Australia and Eurasian plates so it is prone to earthquakes. The City of Manna continues to carry out developments so that it requires various information for urban and regional planning, especially information on subs...

Banyak masyarakat tidak menyadari bahwa abrasi merupakan salah satu bencana yang dapat mengancam kehidupan masyarakat di daerah pesisir. Bertepatan di Desa Urai Kabupaten Bengkulu Utara, pengabdian ini bertujuan untuk memberikan pengetahuan mengenai abrasi mulai dari penyebab, dampak, dan langkah solutif yang dapat dilakukan untuk meminimalisir ris...

This study uses the gravity method to assess the characteristics of the Manna segment fault, a part of the Sumatran fault. This research aims to contribute to the existing knowledge by providing additional insights into the fault's characteristics, which is essential for future disaster mitigation efforts. The Manna segment fault is geographically...

In geothermal reservoirs, hydrothermal distribution is significant. The most widely utilized geothermal reservoirs to date are those of hydrothermal systems, which are geothermal systems where the reservoir contains steam, water, or a mixture of both, depending on the pressure and temperature of the reservoir. One of geophysical method that is enou...

Geothermal energy is one of the mainstay of future alternative energy in Indonesia. One area that is believed to have geothermal potential is Telaga Tujuh Warna Village in Lebong Regency, Bengkulu Province, Indonesia. Manifestations of hot springs, hot mud pools, geysers, sulfur, and the presence of steam around the lake are our beliefs about the e...

p class="AbstractText">The alternative provincial in Bengkulu Tengah Regency is located in a location bordering the Musi Fault segment that is part of the Great Sumatran Fault Zone. This condition makes cross-provincial roads in Central Bengkulu Regency vulnerable to natural disasters such as landslides. The purpose of the study was to determine ar...

Deliniasi 3D struktur geologi daerah prospek Geothermal di Kabupaten Kepahiang telah dilakukan. Tujuan Penelitian adalah untuk mendapatkan gambaran subsurface dan geothermal system di Kepahiang serta memetakan zona alterasinya. Pemodelan kedepan dan inversi dilakukan kepada 194 data geomagnetik telah diukur menggunakan Proton Precission Magnetomete...

Menghadap ka’bah sebagai kiblat umat Islam adalah salah satu syarat sah sholat. Untuk itu diperlukan penghitungan arah kiblat secara akurat. Kegiatan ini bertujuan meningkatkan pengetahuan terhadap penerapan metode penentuan arah kiblat bagi Remaja Masjid Fathul Jannah Perumahan Medan Baru, Kota Bengkulu. Untuk mencapai tujuan kegiatan tersebut dig...

The procurement of Day Old Duck of manila or better known as manila duck seeds is a major problem experienced by joint venture groups owned by RT residents. 12, RW. 01 Kelurahan Sukamerindu (partner) has just started operating and has a limited budget. The production of the partner's manila ducklings is carried out conventionally and is considered...

Measurements have been made using the geomagnetic method in the Air Putih Tourism Area, Tambang Sawah Village, Pinang Belayar District, Lebong Regency with an area of 2000 m x 2500. Data collection was carried out using a Proton Procession Magnetometer (PPM) model G-856, which is a device with a proton sensor. which works based on the precess of th...

ABSTRAKProvinsi Bengkulu adalah provinsi yang rawan akan adanya bencana alam. Salah satu kejadian bencana alam adalah longsor yang terjadi di kabupaten Bengkulu Tengah Provinsi Bengkulu. Kabupaten Bengkulu Tengah Berada pada topograafi yang berada pada elevasi 96 sampai 880 mdpl. Daerah Bengkulu tengah juga memiliki curah hujan yang tinggi dengan r...

Shear wave velocity (Vs) structure at along of Central Bengkulu-Kepahiang crossline has been mapped. This research aims to identify the subsurface structure and to estimate the constituent material type of rock in landslide-prone areas (Central Bengkulu-Kepahiang crossline). Shear wave velocity structure on each site is obtained by the HVSR-inversi...

DOI:10.17014/ijog.8.3.313-328Bengkulu Province is the converging path region between the Indo-Australian - Eurasian tectonic plates in the ocean and the Sumatran f ault crossing on the mainland. The condition implies that the sliding force of the slab is easy to trigger fractures and to cause the material to be relatively less elastic, resulting in...

ABSTRAK- Kota Bengkulu merupakan daerah yang sangat rawan terhadap ancaman gempabumi. Salah satu upaya mengurangi dampak bencana gempabumi adalah melakukan analisis potensi tersebut berdasarkan data mikrotremor dan metode pembobotan statistik. Penelitian ini bertujuan memetakan dan menganalisis daerah-daerah yang rentan mengalami ancaman bahaya gem...

p class="AbstractText">Bengkulu City is located in the subduction zone of the Indo-Australian and Eurasian plates, so it is prone to earthquake. To anticipate the impact of earthquake, disaster mitigation can be carried out, one of which is a study of the level of rock hardness in the area. This study aims to determine the level of rock hardness ba...

It has been known that Bengkulu City (Indonesia) is vulnerable to undergo seismic damage. This study is initiated by measuring horizontal to vertical spectral ratio ( H/V ) to sites in Bengkulu City using microtremor. The inversion analysis is performed to generate shear wave velocity profile. Hundreds of sites are investigated in this study. The r...

Seismic Vulnerability Index and Ground shear strain have been updated to increase the resolution of seismic hazard analysis in Bengkulu City. A total of about 400 sites are studied. The measurement of the sites is performed to obtain the amount of information such as amplification and predominant frequency. Those parameters are empirically analyzed...

Pulau Baai Port is known as the important area in Bengkulu City. The port is also the main port that supports the economic aspect in Bengkulu Province. This study is conducted to observe local site conditions in several areas around Pulau Baai Port. The areas are very important in supporting the function of Pulau Baai Port. Therefore, the understan...

One of the developing areas in Bengkuku City, Indonesia is the downstream of Muara Bangkahulu River. Therefore, this study aims to present an investigation of the local site and analysis of ground response in this area. Geophysical measurements were adopted in this research using multichannel analysis of surface wave and microtremor. Furthermore, f...

Sebaran zona mineralisasi emas menjadi permasalahan yang serius bagi penambang tradisional emas di Desa Tambang Sawah Kabupaten Lebong. Penelitian ini bertujuan untuk memetakan pola sebaran zona mineralisasi emas di Desa Tambang Sawah Kecamatan Lebong Utara yang didasarkan pada anomali magnetik yang memiliki hubungan fisis terhadap mineralisasi ema...

Kabupaten Kepahiang merupakan salah satu daerah yang berada di ring of fire Pacific sehingga memiliki potensi geothermal yang cukup potensial untuk menghasilkan energi terbarukan agar dapat dipergunakan untuk daya penyuplai listrik. Penelitian ini bertujuan untuk memetakan pola sebaran anomali magnetik daerah yang diduga sebagai distribusi dan rese...

It has been known that Bengkulu City (Indonesia) is vulnerable to undergo seismic damage. This study is initiated by measuring horizontal to vertical spectral ratio ( H/V ) to sites in Bengkulu City using microtremor. The inversion analysis is performed to generate shear wave velocity profile. A total of 218 sites is investigated in this study. The...

It has been known that Bengkulu City (Indonesia) is vulnerable to undergo seismic damage. This study is initiated by measuring horizontal to vertical spectral ratio ( H/V ) to sites in Bengkulu City using microtremor. The inversion analysis is performed to generate shear wave velocity profile. Hundreds of sites are investigated in this study. The r...

Struktur batuan bawah permukaan yang lemah diduga salah satu faktor penyebab tingginya laju abrasi di Kabupaten Bengkulu Utara. Struktur batuan bawah permukaan ini diestimasi berdasarkan analisis nilai kecepatan gelombang geser (Vs) dari pengukuran Multichannel Analysis of Surface Wave (MASW) di 20 titik sepanjang garis pantai. Nilai Vs diinterpret...