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All Journal INDONESIAN JOURNAL OF APPLIED PHYSICS KURVATEK Sunan Kalijaga Journal of Physics
Nurhaci, Dian Susri
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Astronomy Civil Engineering, Building, Construction & Architecture Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Engineering Materials Science & Nanotechnology Physics Social Sciences

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ANALYSIS OF LIQUEFACTION POTENT ANALYSIS OF LIQUEFACTION POTENTIAL USING THE ANALYTICAL HIERARCHY PROCESS METHOD IN BANTUL DISTRICT, YOGYAKARTA PROVINCE, INDONESIA: ANALYSIS OF LIQUEFACTION POTENTIAL Nurhaci, Dian Susri
KURVATEK Vol 9 No 2 (2024): Energy Management and Sustainable Environment
Publisher : Institut Teknologi Nasional Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33579/krvtk.v9i2.5409

Abstract

Abstract — The earthquake that struck the Bantul district of Yogyakarta on May 27, 2006, with a Richter scale value of 6.3, caused sandboils in various areas in Bantul Regency. These symptoms are referred to as liquefaction events, and the phenomenon is fascinating to research. These symptoms are referred to as liquefaction events, and the phenomenon is intriguing to researchers. Liquefaction in Bantul Regency is induced by the area's Young Volcanic Deposits of Merapi Volcano and shallow groundwater table, which can result in saturated soil during an earthquake. The research was conducted to assess the potential hazards of liquefaction. The data used in this research includes geological maps, groundwater depth maps, fault distance maps, river distance maps, and slope maps. The method used is the Analytical Hierarchy Process (AHP) to determine the weight of each parameter utilized, employing Geographic Information System software to overlay maps based on the obtained weight values, allowing the liquefaction threat potential map to be classified into high, medium, and low threats. According to the findings of this study, the lowland area between the Bedog and Opak rivers has a high liquefaction potential due to the presence of Young Volcanic Deposits of Merapi Volcano going back to the Quaternary epoch and a relatively shallow groundwater table. In contrast, the hilly terrain west of the Bedog River and east of the Opak River has a low liquefaction potential due to Tertiary sedimentary rocks and a deeper groundwater table
Seismic Disaster Study Based on Soil Vulnerability Index (Kg) and Peak Ground Acceleration (PGA) Values in Kokap and Surrounding Areas: Studi Kebencanaan Seismik Berdasarkan Nilai Indeks Kerentanan Tanah (Kg) dan Perecepatan Tanah Maksimum (PGA) di Daerah Kokap dan Sekitarnya Andini, Dita; Nurhaci, Dian Susri
Sunan Kalijaga Journal of Physics Vol. 6 No. 1 (2024): Sunan Kalijaga Journal of Physics
Publisher : Prodi Fisika Fakultas Sains dan Teknologi UIN Sunan Kalijaga Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14421/physics.v6i1.5154

Abstract

Kulon Progo region is one of the areas in Yogyakarta that often experiences natural disasters, especially landslides. With the morphology of mountains that are described as large domes with flat tops and steep wings (Van Bamelen, 1949), making the Kulon Progo area more prone to landslides. Earthquakes with great force can cause landslides in this area. To map areas that are prone to earthquakes and landslides, research using the microseismic method was used. The research is located in Hargorejo Village and Hargowilis Village, Kokap District and Karangsari Village, Pengasih District, DI. Yogyakarta consists of 9 measurement points. Data processing was performed using Geopsy software using the HVSR method. The results showed that the Kokap area and its surroundings had an amplification factor value range of 1-5 times, the natural frequency value was 1.2 Hz to 12.2 Hz, the dominant period value was 0.5-0.8 s, the soil vulnerability index value was , 1 /cm to 2.7 /cm and a PGA value of 64 cm/  to 206.2 cm/ . Based on the research results, the area most vulnerable to the consequences of the earthquake is the village of Hargorejo. The village of Hargorejo which is composed of andesite intrusion has resulted in mineral alteration which produces clay minerals where clay minerals are impermeable so that they easily become sliding fields. When an earthquake occurs, this area will suffer significant damage.
Analysis of Soil Categories on Seismograf Sensor in Java Island Based on Ground Predominant Period and Vs30 Wibowo, Nugroho Budi; Nurhaci, Dian Susri
INDONESIAN JOURNAL OF APPLIED PHYSICS Vol 5, No 02 (2015): October
Publisher : Department of Physics, Sebelas Maret University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13057/ijap.v5i02.282

Abstract

The aim of this research is to analyze the categorization of soil at sensor site locations based on predominant period of the ground and Vs30. This study was conducted at nine sites seismograph sensors in Java and Madura. Data processing method is using HVSR (Horizontal to Vertical Ratio) based on the SESAME European research project. The Java and Madura Vs30’s data were obtained from the USGS. This study utilizes the criteria of JRA 1990 and BSSC 2000 were used to determine the soil categories. It is found that the criteria of JRA 1900 and BSSC 2000 satisfies some sites namely LEM, KMMI, UGM and WOJI. The site of LEM and UGM have a soil that can be categorized in C type (dense soil / sand to soft rock) with dense soil conditions to the rock weathering process. Site KMMI can be categorized in D type (stiff soil) with dense soil conditions. Whereas the site WOJI can be categorized in A + B type (Hard rock and firm to hard rock) with hard rock conditions.
Co-Authors Andini, Dita Nugroho Budi Wibowo