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All Journal BERKALA FISIKA IJOG : Indonesian Journal on Geoscience Jurnal technoscientia Jurnal Fisika FLUX JURNAL TEKNOLOGI TECHNOSCIENTIA
Kirbani Sri Brotopuspito
Jurusan Fisika, FMIPA, Universitas Gadjah Mada, Yogyakarta
Chemical Engineering, Chemistry & Bioengineering Computer Science & IT Earth & Planetary Sciences Education Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Physics

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Journal : BERKALA FISIKA

 1 
STUDY PENDAHULUAN SESAR OPAK DENGAN METODE GRAVITY (STUDY KASUS DAERAH SEKITAR KECAMATAN PLERET BANTUL) Nurwidyanto, M Irham; Brotopuspito, Kirbani Sri; Waluyo, Waluyo; Sismanto, Sismanto
BERKALA FISIKA Vol 14, No 1 (2011): Berkala Fisika
Publisher : BERKALA FISIKA

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Abstract

The reconnaissance research to predict the position and the type of Opak Fault in surrounding subdistrict Pleret area was carryout by gravity method. It done by measured the intensity of gravity field. The measurement was done in five lines  cross the Opak Fault which indicated in the geological map. The intensity of gravity field  in the surround of subdistrict Pleret area are measured by la-coste Romberg  Gravitymeter,  the latitude are measured by GPS Trimble, and the position are measured by GPS Garmin III Plus. The measurement was done in five lines which separated abaut 2,5 km and about 20 km in length. The distance of observations are about 0,5 km to 1 km. The data which be collected are reduction by drift and tidal correction, free air correction, bouger correction and terrain correction. The corrected data are made bouger anomaly contour. The result of this research by kwalitative interpretation are estimated that  the location of Opak Fault in the eastern part of the position of Opak Fault which indicated in the geological map. The type of opak fault are normal fault, because can be detected by gravity method. Key words : Opak Fault, Pleret, gravity method. 
PEMETAAN PERCEPATAN GETARAN TANAH MAKSIMUM MENGGUNAKAN PENDEKATAN PROBABILISTIC SEISMIC HAZARD ANALYSIS (PSHA) DI KABUPATEN KEPAHIANG PROVINSI BENGKULU Hadi, Arif Ismul; Brotopuspito, Kirbani Sri
BERKALA FISIKA 2015: Berkala Fisika Vol. 18 No. 3 Tahun 2015
Publisher : BERKALA FISIKA

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Abstract

This study aims to analyze and map the peak ground acceleration using the approach of Probabilistic Seismic Hazard Analysis (PSHA) in the area. Earthquake catalog data obtained from BMKG, ISC and USGS began in 1914 until 2014. Declustering process using ZMAP ver.6 software. Identification and modeling of the seismic source uses three models of seismic sources: (1) to subduction earthquake source, (2) the source of the earthquake fault and (3) the source of the quake background. Parameters a-value and b-value is obtained by the Gutenberg-Richter recurrence law and maximum likelihood method, whereas the determination of the attenuation function and logic tree refers to the Revision Team of Indonesia Earthquake 2010. Peak ground acceleration values obtained using USGS-PSHA-07 software. The results showed that the value of the peak ground acceleration in the Kepahiang District for probability exceeded 10% and 2% in the 50 year design life of the building is 0.15 – 0.8 g and 0.25 – 1.3 g. Areas that are the red zone is the Ujan Mas Sub-district, Kepahiang Sub-district, Tebat Karai Sub-district, Seberang Musi Sub-district and Bermani Ilir Sub-district, while the regions are relatively safe from the red zone is the Merigi Sub-district, Kabawetan Sub-district and Muara Kemumu Sub-district. Red zone is an area adjacent to the Sumatran Fault of Musi Segment. Keywords: peak ground acceleration, PSHA, red zone and Sumatran Fault of Musi Segment.
Co-Authors -, Prayoto Agung Setianto Ari Setiawan Arif Ismul Hadi Hetty Triastuty Indriana, Rina Dwi Irham Nurwidyanto Kiyono, Junji Pasangka, Bartholomeus Sismanto Sismanto Soenantyo, Tarcisius Aris Subagyo Pramumijoyo, Subagyo Thein, Pyi Soe Vico Luthfi Ipmawan Wahyu Wilopo Wahyudi Wahyudi Waluyo -, Waluyo Yoga Yuniadi