Spatial Temporal Condition of Recent Seismicity In The Northern Part of Sumatra

Nurana, Inna; Simanjuntak, Andrean V. H.; Muksin, Umar; Kuncoro, Djati Cipto; Syamsidik, Syamsidik; Asnawi, Yusran

doi:10.22373/ekw.v7i1.8797

Cited by 5 publications

(1 citation statement)

References 40 publications

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“…The 𝑏𝑏-value also measures the relative number between small and large earthquakes [14,15]. The [16] have been conducted research regarding to the seismicity in the Northern Part of Sumatra. They concluded that the seismicity in the Northern Part of Sumatra was high.…”

Section: Introductionmentioning

confidence: 99%

Temporal Change and Spatial Distribution Analysis of b-value and a-value in Sumatra

Khalqillah,

Umar

2023

E3S Web Conf.

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The study of seismicity is very important to be conducted in the region of interest, such as Sumatra which has high seismicity. The seismicity can be learned by using a statistical approach through the b-value and a-value parameters. The b-value describes the stress accumulation of rock while the a-value describes the seismic activity. The objective of this research is to analyse the temporal change and spatial distribution seismicity based on b-value and a-value parameters in Sumatra by using an updated earthquake catalog from 1964 to 2022. This research found that in 1965 and 1972 have b-values greater than 2 temporally. In the spatial distribution analysis, Sumatra was dominated by b-value less than 1.91. Six clusters were found to have the lowest b-value. It might indicate high seismic stress accumulation spatially in these clusters. The temporal change and spatial distribution analysis were validated by using four destructive earthquakes in Sumatra, such as Sumatra-Andaman, Nias-Simeulue, Mentawai, and Pasaman Barat earthquakes. The b-values were found to be less than 1 either temporally or spatially. The large earthquake was confirmed to have a low b-value. This indicates high seismic stress accumulation. These results can be used for further seismic hazard analysis and decision support for disaster mitigation purposes.

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Section: Introductionmentioning

confidence: 99%

Temporal Change and Spatial Distribution Analysis of b-value and a-value in Sumatra

Khalqillah,

Umar

2023

E3S Web Conf.

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A preliminary result of microtremor study to identify the subsurface condition in the Aceh Tenggara region

Simanjuntak

Muksin

2022

E3S Web Conf.

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The Aceh Tenggara region is located in an tectonically active region and it can be categorized as the prone-area. Historically, there were many major earthquakes occured the active fault called the Tripa segment that has generated massive damages and losses. The study of the seismic vulnerability around the highly populated city in the Aceh Tenggara region, Kutacane City, as the center of economy and office activities must be conducted to prepare the suitable earthquake mitigation program. The microtremor have been recorded at 25 sites with one km grid interval between all points. The record lengths have 30 minutes duration at each site, and they were measured with the Taurus Seismometer in miniseed format. The data were analyzed by using the HVSRpy in order to obtain the Horizontal to Vertical Spectral Ratio for each site by means of the geometric-mean and the multiple azimuths methods. Both methods provided a similar result at both focuses with dominant frequency of 0.8 Hz at the AT01 site and 4.8 Hz at the AT14 location. The preliminary result shows that the higher dominant frequency were recorded along the southern part of the Kutacane city which is associated with the Alas formation.

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A possibility scenario of tsunami run-up model in Aceh from potential major earthquake in the Northern Part of Sumatra

Nurana

Susanto

Simanjuntak

et al. 2023

AIP Conference Proceedings

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Spatial Temporal Condition of Recent Seismicity In The Northern Part of Sumatra

Cited by 5 publications

References 40 publications

Temporal Change and Spatial Distribution Analysis of b-value and a-value in Sumatra

Temporal Change and Spatial Distribution Analysis of b-value and a-value in Sumatra

A preliminary result of microtremor study to identify the subsurface condition in the Aceh Tenggara region

A possibility scenario of tsunami run-up model in Aceh from potential major earthquake in the Northern Part of Sumatra

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