Incorporating the local faults effects in development of seismic ground-motion hazard mapping for the Peninsular Malaysia region

Shoushtari, Abdollah Vaez; Adnan, Azlan; Zaré, Mehdi

doi:10.1016/j.jseaes.2018.06.010

Cited by 6 publications

(2 citation statements)

References 42 publications

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“…Shuib [60] described that the similarity among the intraplate earthquakes is that there are a lack of surface ruptures. Shoushtari et al [65] observed that there were several cracks at the police headquarters and secondary school buildings in Bukit Tinggi area as a result of these tremors.…”

Section: Structural Analysis Conducted On the Srtm-dem Image Shows The Distribution Of Bukit Tinggi And Kuala Lumpurmentioning

confidence: 99%

Intraplate earthquake occurrence and distribution in Peninsular Malaysia over the past 100 years

Nazaruddin

Düerrast

2021

SN Appl. Sci.

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Peninsular Malaysia is tectonically situated on a stable craton (intraplate) and so far experiences relatively little earthquake activities, thus considered as a region with low seismicity. This study uses earthquake data from 59 events obtained from various sources in the period 1922 to 2020. The overall seismicity in the study area is low as expected due to the general intraplate setting. Earthquakes occurred onshore and offshore of Peninsular Malaysia between latitudes 1° and 7° N and longitudes 99° and 105° E. The seismicity pattern shows that the epicenters are distributed spatially in some parts of the peninsula and in the Malacca Strait with several epicenter zones. Most of earthquakes are associated with several preexisting faults and fault zones indicating that they are the major contributor to the local seismicity. Meanwhile, some further earthquakes were caused by activities related to reservoirs. Magnitudes are ranging from Mw 0.7 to 5.4 with the majority is Mw 1.0 + and 2.0 +. Hypocenters are located in between 1 and 167 km deep (shallow to intermediate earthquakes) with the majority being shallow earthquakes (1–70 km). The deepest earthquake located in the Straits of Malacca can be associated with a slab detachment broken off from the Sumatran Subduction Zone. Finally, this study contributes to the understanding of the intraplate seismicity of Peninsular Malaysia as a basis for seismic hazard and risk assessment.Article Highlights Earthquake assessment over the last 100 year reveals low but clear seismicity with an associated seismic hazard and risk for certain areas. Shallow, low-magnitude earthquakes associated with reservoir activities and preexisting faults reactivated by the nearby subduction zone. A deeper, low-magnitude earthquake can be related to slab detachment from the Sumatran subduction zone toward the east.

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Section: Structural Analysis Conducted On the Srtm-dem Image Shows The Distribution Of Bukit Tinggi And Kuala Lumpurmentioning

confidence: 99%

Intraplate earthquake occurrence and distribution in Peninsular Malaysia over the past 100 years

Nazaruddin

Düerrast

2021

SN Appl. Sci.

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“…Despite being published in Pagani et al (2018Pagani et al ( , 2020, the data map initially shows different values in contrast to MS EN1998:2015 (2017) for the Malaysia region. This could be linked to an updated Malaysian database that includes local seismic sources, as discovered by Shoushtari et al (2018) and Harith et al (2023).…”

Section: Introductionmentioning

confidence: 99%

Seismic Hazard Map of ASEAN Countries towards Risk Assessment and Sustainability of Structures and Infrastructures

HARITH,

ADNAN

2023

EPSTEM

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This study contains the most recent seismic hazard map of Southeast Asia. This area is located to the south of the Eurasian plate. The Ring of Fire that surrounds the region makes it one of the most active in terms of earthquakes and volcanoes. Malaysia, Indonesia, Thailand, Singapore, the Philippines, Myanmar, Vietnam, Laos, Cambodia, and Brunei are among the countries being studied. The goals of this project are to provide Peak Ground Acceleration (PGA) values for all regions in ASEAN countries, and then to create seismic zoning maps for these countries so that zones with non-seismic regions can be identified and zones with no special steel reinforcement-detailing requirements can be specified. The final step is to create design response spectra. Based on each nation's most recent body of literature, the PGA hazard map is created. There are two maps that need to be created, one for 10% and one for 2% probability of exceeding. The PGA contours of all the compiled maps were then reconstructed, and the baseline colours were compared to an Indonesia seismic hazard map. The maximum PGA value for Southeast Asia is as high as 0.8g at 10% and 2.0g at 2% probability of exceedance, respectively, whereas the minimum PGA value is typically equal to 0.0g at both 10% and 2% probability of exceedance. The design response spectrum distribution of the stable with moderate earthquake region from 0 to 4 s (including West Malaysia, Sabah and Sarawak of East Malaysia) and the distribution of spectra for active earthquake regions including Indonesian cities (including Acheh, Padang and Palu) are plotted. Then, the design response spectra for the selected cities in regions of moderate seismicity and active earthquakes are integrated.

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Development of elastic design response spectra with emphasis on far-source earthquakes for low to moderate seismic region

et al. 2023

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The development of design response spectra is crucial for earthquake design of structures. However, there are disagreements from the engineering community on the suitability of design values proposed by the existing design code which underestimates the long-period responses for flexible soils, typical of far-source earthquakes. This study uses soil response analysis to investigate the effect of near and far sources' earthquakes on the response spectral acceleration of Malaysia in three seismically different regions, namely Peninsular Malaysia, Sabah and Sarawak. 1923 borehole data have been collected and analysed under 5 near and 4 far sources earthquakes, subjected to the intensity from the probabilistic seismic hazard analysis. The results show that for Peninsular Malaysia, the far-source earthquake will govern the response at a period of more than 1 s, indicating its importance for structures with long periods such as tall buildings. It is also found that the corner period T C is slightly higher than the code recommended and is dependent on the soil property, while T D is significantly higher for far-source earthquakes due to the larger magnitudes. The finding of this research shows that the Eurocode 8 supplemented by the Malaysian National Annex (MS-EN1998-1, 2017) can be used to design structures in Malaysia, with some adjustments to the longer period motion for Peninsular Malaysia. Finally, it is recommended to perform an enhanced analysis for important structures of long periods to ensure their loadings are not underestimated.

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Incorporating the local faults effects in development of seismic ground-motion hazard mapping for the Peninsular Malaysia region

Cited by 6 publications

References 42 publications

Intraplate earthquake occurrence and distribution in Peninsular Malaysia over the past 100 years

Intraplate earthquake occurrence and distribution in Peninsular Malaysia over the past 100 years

Seismic Hazard Map of ASEAN Countries towards Risk Assessment and Sustainability of Structures and Infrastructures

Development of elastic design response spectra with emphasis on far-source earthquakes for low to moderate seismic region

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