The estimated PGA map of the Mw6.4 2006 Yogyakarta Indonesia earthquake, constructed from the Modified Mercalli intensity IMM

Pawirodikromo, Widodo

doi:10.5459/bnzsee.51.2.92-104

Cited by 4 publications

(5 citation statements)

References 24 publications

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“…Ketidakpastian umumnya dibagi menjadi 2 yaitu ketidakpastian aleatory dan epistemic. Ketidakpastian epistemic dalam analisis PSHA dapat diatasi dengan menerapkan model logic tree (Pawirodikromo, 2018). Penggunaan logic tree akan memberikan kerangka yang lebih tepat dalam memperbaiki hasil analisis akibat adanya ketidakpastian.…”

Section: Penggunaan Logic Treeunclassified

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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Section: Penggunaan Logic Treeunclassified

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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“…In addition to the impacts of Megathrust earthquakes and Benioff earthquakes, the YSP area is also affected by shallow earthquakes both due to the activity of collision plates and due to active fault activity called the Opak river fault. According to Pawirodikromo [2], the Opak riverfault, which is about 54 km long, is located approximately only 10 km south-east of Yogyakarta city.…”

Section: Earthquake Sources Of the Yspmentioning

confidence: 99%

“…7. Considering there were no recorded earthquakes in the Yogyakarta region [2], then the candidates for earthquake recordings from the USGS Catalog were selected. Finally, 12 earthquake recordings were obtained (more than the minimum requirement of 11 earthquake recordings) as presented in Table 3, all of which are shallow crustal earthquake records.…”

Section: Spectral Matchingmentioning

confidence: 99%

“…Indonesia is one of the earthquakes (EQ) prone countries in the world, including in the Yogyakarta Special Province (YSP). As stated by Pawirodikromo [2], there is no significant strong-motion record network in Indonesia, so the availability of ground motion time series is still a big problem. The problem was related to structural analysis after the 2019 Indonesian Seismic Loading Code [1] was published.…”

Section: Introductionmentioning

confidence: 99%

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Development of synthetic ground motion at a specific site in Yogyakarta town, Indonesia utilizing the PSHA Method

Pawirodikromo¹,

Makrup²,

Teguh³

et al. 2020

E3S Web Conf.

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This paper presents the development of synthetic ground motion at specific sites in Yogyakarta town. In the 2019 Indonesian Seismic Code [1] provides an alternative method in the analysis of building structures by applying the dynamic time history analysis. At least 11-pairs of earthquake recordings must be used in the analysis. Synthetic ground motion utilizing the Method of Probability Seismic Hazard Analysis (PSHA) was used in this study. A selected site in Yogyakarta town was chosen as a pilot study considering that there were many fatalities and building damage caused by the 2006 Yogyakarta earthquake. The Uniform Hazard Spectra (UHS) based on the shallow crustal earthquake source is higher than the Megathrust. The risk targeted spectrum demand MCEr has been considered, which on average 12.3% greater than the UHS. The synthetic ground motions (SGM) are accordingly based on the shallow crustal earthquakes. The dominant magnitude and distance are M D = 6.5 and R D = 14.5 km. They show that the contribution of the Opak River fault to the hazard in Yogyakarta town is very dominant because the distance is very close. Based on the obtained M D and R D , spectral matching, and testing significant duration D 595 , the 12-synthetic ground motions were successfully developed.

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“…Among the general criteria is to consider global earthquake models and exclusion criteria. According to [25,27,28], the exclusion criteria in the selection of the GMPE it should be considered in the PSHA and the criteria have been summarized by [29]. As stated earlier that the source of the earthquake in YSP is mainly generated from the subduction and shallow crustal mechanisms.…”

Section: The Ground Motion Prediction Equation (Gmpe)mentioning

confidence: 99%

Site Coefficient of Short Fa and Long period Fv Maps Constructed from the Probabilistic Seismic Hazard Analysis in Yogyakarta Special Province

et al. 2019

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Among the devastated earthquakes that have occurred in theYogyakarta Special Province (YSP) were earthquakes that occur in 1867,1943 and 2006 [1,2]. Macro site coefficient is already available in [3]however, more detailed site coefficient or presented on a micro scale is notyet available. The disaster mitigation program is needed and one of whichis the availability of the microseismic site coefficient maps for short periodFa and long period Fv particularly for building design. The probabilisticseismic hazard analysis (PSHA) has been carried out. The subduction andthe shallow crustal earthquakes within 500km radius from the city ofYogyakarta have been used. In contrast to [4], PSHA was carried out byusing 10% probability of the earthquake being exceeded within 50 years. Result of this study indicates that YSP is dominated by hard SD andmedium soil categories. The medium soil is mainly located at along theOpak and Progo river valleys and along the southern coast of Bantul andKulonprogo districts. The short period site coefficient Fa is stronglyinfluenced by the Opak fault as an earthquake source, while the sitecoefficient for long period Fv is more influenced by the Megathrustearthquake source. For PGA < 1.0g, the seismic coefficient Fa for shortperiod increases with increasing Vs30, meanwhile for long period ofseismic coefficient Fv decreases with increasing Vs30.

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The estimated PGA map of the Mw6.4 2006 Yogyakarta Indonesia earthquake, constructed from the Modified Mercalli intensity IMM

Cited by 4 publications

References 24 publications

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

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

Development of synthetic ground motion at a specific site in Yogyakarta town, Indonesia utilizing the PSHA Method

Site Coefficient of Short Fa and Long period Fv Maps Constructed from the Probabilistic Seismic Hazard Analysis in Yogyakarta Special Province

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