Analisis Percepatan Tanah Permukaan Di Wilayah Riau Dengan Metode Psha

Saputra, Elvis; Makrup, Lalu; Nugraheni, Fitri; Widodo, Widodo

doi:10.20885/teknisia.vol25.iss1.art5

Cited by 5 publications

(8 citation statements)

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“…Probabilistic Seismic Hazard Analysis is the term used to describe the application of probability concepts to seismic hazard analysis (PSHA). By utilising the logic tree concept, the PSHA method takes into account uncertainty in determining earthquake parameters such as maximum magnitude, GMPE equation selection, model selection (recurrence model), and recurrence rate [7]. The stages of probabilistic analysis in determining Peak Ground Acceleration (PGA) are presented in Figure 3.…”

Section: Methodsmentioning

confidence: 99%

“…After converting the earthquake data to a magnitude scale (Magnitude moment), it is declustring, or separated into dependent and independent earthquakes. Additional dependent earthquake occurrences will result in a modest rise in the seismic hazard analysis results [7]. In this research, dependent and independent earthquake separation methods were developed using empirical models from Gardner and Knopoff (1974).…”

Section: Data Processingmentioning

confidence: 99%

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Earthquake Threats in Ranau – From The Sources of Mensaban and Mesilou Fault

Termizi

Tongkul

Harith

et al. 2022

IOP Conf. Ser.: Earth Environ. Sci.

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Unlike the majority of Malaysia’s other states, Sabah is characterised by frequent seismological activity; on average, an earthquake of moderate magnitude occurs roughly every 20 years, originating primarily from one of two major sources: either a local source or a regional source. Sabah has seen an upsurge in low to moderate seismic activity in recent years as a result of the fault activities. Between 1900 and lately, magnitudes ranging from MW 2.9 to 6.0 were recorded. While big magnitude earthquakes are relatively uncommon, the area has previously been struck by disastrous earthquakes. Fortunately, the region is demarcated by active Quaternary fault networks. As a result, the area’s seismicity is calculated using line sources corresponding to these faults. Two major fault systems are suspected of being the cause of such activity: the Mensaban fault zone and the Mesilou fault zone, as well as several additional nearby faults. This article explains the process for doing a probabilistic seismic hazard analysis (PSHA) while taking into consideration the peak ground acceleration (PGA) on bedrock in the Ranau region for a 10% and 2% chance of exceedance. The PGA estimate values for Ranau are between 0.08g to 0.16g for PGA 10%, while for PGA 2% was between 0.15g to 0.28g. The PGA value is divided into the following five earthquake hazard classes based on a quarterly geostatistical analysis method. These are “very low,” “low,” “medium,” “high,” and “very high” classes. In general, this quarterly classification is a good way to see how much local seismic activity there is, based on the PGA value. Which can be seen in 10% probability, 19.88 percent of the study area was in “very low,” 20.19 percent was low, 19.98 percent medium, and 19.92 percent high class. 2% probability, it was found that 19.74 percent of the total area was very low class, 20.06 percent low class, 19.79 percent middle class, and 19.82 percent high class. Only 20.6 percent of the area was “very high”.

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Section: Methodsmentioning

confidence: 99%

Section: Data Processingmentioning

confidence: 99%

Earthquake Threats in Ranau – From The Sources of Mensaban and Mesilou Fault

Termizi

Tongkul

Harith

et al. 2022

IOP Conf. Ser.: Earth Environ. Sci.

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“…Penentuan nilai spektra percepatan pada penelitian ini merupakan pengembangan dari penelitian yang telah dilakukan sebelumnya oleh (Saputra et al, 2020). Dimana pada penelitian tersebut penentuan nilai percepatan tanah permukaan dilakukan dengan menganalisis PSHA menggunakan persamaan atenuasi tanah (sebelum NGA) dan menggunakan Vs30 untuk persamaan GMPE (NGA).…”

Section: Penentuan Spektra Percepatan DI Permukaanunclassified

“…Model kedua (Model-2) sama dengan penelitian (Saputra et al, 2020) Hasil akhir dari penelitian ini berupa peta percepatan puncak (PGA) di permukaan tanah dengan probabilitas terlampaui 2% dalam 50 tahun umur rencana bangunan untuk masing-masing Model analisis. Penentuan nilai percepatan gerakan tanah dalam penelitian ini digunakan bantuan program Seismic Risk Model (Makrup, 2009).…”

Section: Penentuan Spektra Percepatan DI Permukaanunclassified

Comparison of Soil Surface Seismic Hazard Maps as Basic Disaster Mitigation Based Spatial Planning in Riau Province

Saputra

Nugraheni

Pawirodikromo

et al. 2021

MKTS

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Spatial planning has an important role in disaster mitigation efforts. The availability of earthquake maps is very useful in spatial planning. The need for spatial planning today is micro spatial planning. Therefore, the 2017 national earthquake map needs to be detailed into a micro zonation map at the district or city scale. The ground acceleration presented in the national earthquake map was the acceleration at bedrock, while in spatial planning it is the necessary acceleration at the surface. Therefore, the purpose of this research was to obtain a map of the earthquake at the surface with a micro-scale. Determination of the acceleration value at the surface was carried out by two models. Model-1, the surface acceleration was obtained by multiplying the results of the PSHA analysis at bedrock by the amplification factor based on SNI-1726. While Model-2, the acceleration value at the surface was directly obtained from the results of PSHA analysis using the average surface shear wave velocity (Vs30) based on data from the USGS. The result of this study showed that from the 2 analytical models used, Model-2 has a higher surface acceleration value than Model-1. Riau Province has 12 districts. in general, the 12 districts were included in the low to moderate risk index class, but there was one district that was close to the high index class, namely Rokan Hulu district.

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“…Based on the analysis of the 250 m buffer on both sides of the Semangko Fault, there are three locations within the planned area which are outside the active fault zone but this area is located in an earthquake-prone area [5] Elvis Saputra et. all in [6] conducted research on seismic hazards in the Riau region which is directly adjacent to West Sumatra which is an area with high seismic risk. The analysis uses the Probabilistic Seismic Hazard (PSHA) method with the help of The SR Model software.…”

Section: Introductionmentioning

confidence: 99%

Mapping of Peak Ground Acceleration (PGA) Values using the Donovan Model for Sumatran

Zera

Fauziah

Nafian

et al. 2022

J. Phys.: Conf. Ser.

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The island of Sumatra is characterized by three tectonic systems, which are sequentially from west to east consisting of an oblique subduction zone with gentle subduction angles, the Mentawai fault, and the Sumatran large fault zone (Semangko fault). These three tectonic systems have caused high seismic activity and have implications for ground movement (Peak Ground Acceleration). This research calculates the PGA value using the Donovan model based on historical data from 100 years of destructive earthquakes. The results of this calculation are mapped and obtained results that have similarities with the tectonic system, where the west coast is a high-risk area for ground movement. The model gives PGA results in the range 8.5508 – 368.1172 gal with a minimum value of 3.295° N, 95.982° E caused by earthquake 9.1 SR, Andaman Island. The maximum value is at 4.436° S, 101.076° E caused by earthquake 5.2 SR, Bengkulu. In general, this map provides an overview of the risk of land movement on the island of Sumatra and can be used for land movement disaster mitigation efforts.

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Analisis Percepatan Tanah Permukaan Di Wilayah Riau Dengan Metode Psha

Cited by 5 publications

References 0 publications

Earthquake Threats in Ranau – From The Sources of Mensaban and Mesilou Fault

Earthquake Threats in Ranau – From The Sources of Mensaban and Mesilou Fault

Comparison of Soil Surface Seismic Hazard Maps as Basic Disaster Mitigation Based Spatial Planning in Riau Province

Mapping of Peak Ground Acceleration (PGA) Values using the Donovan Model for Sumatran

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