Past Earthquakes in Indonesia and New Seismic Hazard Maps for Earthquake Design of Buildings and Infrastructures

Irsyam, Masyhur; Hendriyawan,; Asrurifak, M.; Ridwan, Mohamad; Aldiamar, Fahmi; Sengara, I Wayan; Widiyantoro, Sri; Triyoso, Wahyu; Hilman, Danny; Kertapati, Engkon K.; Meilano, Irwan; Suhardjono,; Firmanti, Anita

doi:10.1007/978-94-007-5675-5_3

Cited by 12 publications

(12 citation statements)

References 12 publications

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“…However, the locations of the earthquake epicentre suggests that the earthquake source is about 20 -30 km NE of Aceh segment. Moreover, previous regional geological and seismic hazard studies did not identify an active fault in this region (e.g., Irsyam et al, 2010;Natawidjaja and Triyoso, 2007;Sieh and Natawidjaja, 2000). Thus, the 2013 earthquake event was therefore somewhat unexpected.…”

Section: Introductionmentioning

confidence: 83%

Surface Rupture and Geotechnical Features of The July 2, 2013 Tanah Gayo Earthquake

Daryono

Tohari

2016

Indonesian J. Geosci.

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-An assessment of surface rupture and collateral ground failures can help to evaluate the impact of future earthquakes. This paper presents the results of a field survey conducted to map the surface rupture and geotechnical phenomena associated with the ground shaking during the July 2, 2013 earthquakes in Tanah Gayo Highland. The objectives of this survey are to document and to characterize the surface ruptures as well as to identify types of earthquake-induced ground failures. Results of the survey identified four best sites of possible surface rupture. Two locations are obvious surface ruptures that can be traced on primary topographic feature of the active fault segment from the north to the south, crossing Pantan Terong Hill. The fault segment has a total mapped length of 19 km, with WNW trending zone and a dextral rupture offset. The ground shaking also resulted in landslides and liquefaction in areas underlain by very fine-grained tuffaceous sands. Based on the field survey, it can be concluded that the newly defined active fault segment, the Pantan Terong segment, is likely the segment that ruptured at the July 2, 2013 Tanah Gayo earthquake. Due to the soil types and unstable rocky slopes in the hilly Central Aceh region, large-scale landslides are primary risks during an earthquake event in this region.

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Section: Introductionmentioning

confidence: 83%

Surface Rupture and Geotechnical Features of The July 2, 2013 Tanah Gayo Earthquake

Daryono

Tohari

2016

Indonesian J. Geosci.

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“…The target acceleration response spectrum was scaled at some spectral periods of the uniform hazard spectrum (UHS) of a 2500-year earthquake return period (RP), shown in Figure 6, which was obtained using the probabilistic seismic hazard analysis (PSHA) method (Asrurifak, et al [18]). The fault model and the subduction model were applied by utilizing the available earthquake sources and their parameters issued by the Team for Revision of Seismic Hazard Maps of Indonesia 2010 (Irsyam, et al [19,20]). Modified acceleration time histories for bedrock in Jakarta from megathrust, Benioff, and crustal earthquake sources for an RP of 2500-year.…”

Section: Methodsmentioning

confidence: 99%

Determination of The Site Amplification on Deep Soil Layer Using 1-D Site Response Analysis (Case study: Jakarta City, Indonesia)

Delfebriyadi

Irsyam

Hutapea

et al. 2019

J. Eng. Technol. Sci.

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The dynamic response of deep soil layers is used in the development of microzonation maps. The empirical correlation between standard penetratation blow count numbers and S-wave velocity was derived for practical purposes in site characterization based on local data in a case study in Jakarta, Indonesia. For estimating the intensity of potential earthquake shaking at the ground surface as a function of depth to the bedrock surface layer, 1-D site response analysis was carried out in 5745 simulations. The site amplification values were then evaluated by dividing the spectral acceleration (SA) at ground surface by the SA at rock outcrop. Plots of the SA amplification values at interested depth intervals of the bedrock surface layer were assigned. The results showed that the site amplification values estimated by considering the local depth of the bedrock surface layer were generally smaller than the SA amplification values from the Indonesian seismic building code SNI-1726-2012. Also, there appears to exist a tendency of lower levels of mean regression of amplification, in particular for the soft soil site class.

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“…Having a total subduction segment of 840 km, the Java Megathrust can potentially generate the earthquake with the maximum magnitude of 8.1 Mw (Fig. 1) [5], which can influence the study area. Additionally, one of an active fault in Java, Opak Fault, passes over this area along the west flank of Baturagung Escarpment.…”

Section: Introductionmentioning

confidence: 99%

“…1. The segmentation model of subduction earthquake source (Megathrust) in Indonesia, source: [5] Administratively, the west flank of Baturagung consists of several sub-districts such as Kretek, Pundong, Imogiri, Dlingo, Pleret, and Piyungan. However, due to the complexity of physical characteristics, this study was conducted in Pleret Sub-District, Bantul Regency, Yogyakarta Province, Indonesia.…”

Section: Introductionmentioning

confidence: 99%

Earthquake Triggered Multi-Hazard and Risk Study Based on Remote Sensing and Geographic Information System

Saputra¹,

Gomez²,

Delikostidis³

et al. 2018

Preprint

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Yogyakarta City is one of the big city which is located in Java Island, Indonesia. Yogyakarta City, including study area (Pleret Sub District), are very prone to earthquake hazards, because close to several active earthquake sources. For example, Sunda Megathrust which often generates a big earthquake which can affect the study area. The Sunda Megathrust extends from north to south and west to east along the Sumatra and Java Islands. Furthermore, an active normal fault called as Opak Fault pass through right in the middle of Study area and divides the study area into east and west zone. Recently, after the devastating earthquake in 2006, the population of the study area increases significantly. As a result, the housing demand is also increasing. However, due to the absence of earthquake building code in the study area, locals tend to build improper new houses. Furthermore, in some part of the mountainous area in the study area, there are some building found in unstable slopes area. Due to this condition, the multi-hazard and risk study needs to be done in Pleret. The increasing of population and improper houses in Pleret Sub-District can lead to amplify the impact. Thus, the main objective of this study is to assess the multi-hazards and risk of earthquake and other related secondary hazards such as ground amplification, liquefaction, and coseismic landslide.  The method mainly utilised the geographic information system, remote sensing and was fit up by the outcrop study. The results show that the middle part of the study area has a complex geological structure. It was indicated by a lot of unchartered faults was found in the outcrops. Furthermore, the relatively prone areas to earthquake can be determined. In term of the coseismic landslide, the prone area to the coseismic landslide is located in the east part of the study area in the middle slope of Baturagung Escarpment. The highly potential area of liquefaction is dominated in the central part of the study area. In term of building collapsed probability, the result shows that the safest house based on statistical analysis is the residential house with the building attribute of wood structure, roof cast material, distance more than 15 km from the earthquake source, and located above the Nglanggran Formation. Finally, the multi-hazard and risk analysis show that the middle part of the study area is more vulnerable than the other part of Pleret Sub-District.

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Past Earthquakes in Indonesia and New Seismic Hazard Maps for Earthquake Design of Buildings and Infrastructures

Cited by 12 publications

References 12 publications

Surface Rupture and Geotechnical Features of The July 2, 2013 Tanah Gayo Earthquake

Surface Rupture and Geotechnical Features of The July 2, 2013 Tanah Gayo Earthquake

Determination of The Site Amplification on Deep Soil Layer Using 1-D Site Response Analysis (Case study: Jakarta City, Indonesia)

Earthquake Triggered Multi-Hazard and Risk Study Based on Remote Sensing and Geographic Information System

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