Lesser Sunda Islands Earthquake Inter-occurrence Times Distribution Modeling

Kinasih, Indira Puteri; Wiriasto, Giri Wahyu; Kanata, Bulkis; Zubaidah, Teti

doi:10.14716/ijtech.v5i3.610

Cited by 7 publications

(5 citation statements)

References 8 publications

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“…Seismic Hazard Analysis is normally performed to predict the risk level of earthquake impact, which includes probabilistic seismic hazard analysis (PSHA) and deterministic seismic hazard analysis (DSHA) (Reiter, 1990). PSHA is a statistical method used to predict a representative earthquake, considering its recurrence in a region (Kinasih et al, 2014), whereas DSHA is a simple deterministic method which determines the most credible earthquake or the controlling earthquake. In DSHA, the most credible earthquake is predicted based on the serious impact on the study area (Mase & Somatri, 2016).…”

Section: Deterministic Seismic Hazard Analysismentioning

confidence: 99%

Reliability Study of Spectral Acceleration Designs Against Earthquakes in Bengkulu City, Indonesia

Mase¹

2018

IJTech

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This paper presents a reliability study of spectral acceleration designs against earthquakes in Bengkulu City. Seismic Hazard Analysis of 1,968 events is performed to define the controlling earthquake event. Furthermore, the controlling earthquake is used as the scale factor to generate five input motions for one-dimensional seismic response analysis. The spectral accelerations resulting from the analysis are then compared to the updated spectral acceleration design. The results show that spectral acceleration designs are still able to cover the spectral acceleration of seismic response analysis. However, for the short period, the spectral acceleration of seismic response analysis exceeds the designed spectral acceleration. This is a matter of concern, since most of the building natural period in Bengkulu City is still categorized as short. In general, this study brings awareness to the design aspect considering earthquakes in Bengkulu City in order to reduce the possible impact on structures in the future.

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Section: Deterministic Seismic Hazard Analysismentioning

confidence: 99%

Reliability Study of Spectral Acceleration Designs Against Earthquakes in Bengkulu City, Indonesia

Mase¹

2018

IJTech

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“…The PSHA parameters for Kupang were lower than those of Mataram and Bima. As consequences, probability analyses show that medium and weaker earthquakes have a bigger chance of reoccurrence in Lombok and surrounding islands, most probably within 5 years [69].…”

Section: Table 3: Pga Values For Various Cities In the Nusa Tenggara mentioning

confidence: 96%

An update to seismic hazard levels and PSHA for Lombok and surrounding islands after earthquakes in 2018

Agustawijaya

Taruna

Agustawijaya³

2020

BNZSEE

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A series of earthquakes occurred at the northern part of Lombok Island during July–September 2018 with the highest Mw7.0 5th August 2018 that caused the death of hundreds of people and ruined thousands of buildings. The earthquakes were triggered on the Flores Thrust located at the back arc zone and at only 50 km distance from the island, leading to multiple seismic hazards to Lombok and surrounding islands. The thrust could possibly be the dominant current seismic sources; however, the megathrust sources also contributed to the hazards due to the subduction between the Indo-Australia and Eurasia tectonic plates in the Nusa Tenggara region. An updated probabilistic seismic hazard analysis was, therefore, conducted on recent seismicity, detailed tectonic background, and suitable ground motion prediction equations, to determine higher seismic parameter values than the 2017 models. This means that Lombok and surrounding islands exposed to higher seismic hazards than those predicted before the earthquake events in 2018.

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“…Total kejadian gempa di Lombok dan sekitarnya dari tahun 1900 sampai 2014 adalah 2081 kejadian, yakni amplitudo gempa 4-4.9 SR terdapat 1709 kejadian, 5-5.9 SR terdapat 336 kejadian, dan 6-8 SR terdapat 36 kejadian. Gempa-gempa tersebut merupakan gempa-gempa dangkal (kedalaman < 40 km) yang berpotensi menimbulkan bencana [3].…”

Section: Pendahuluanunclassified

Pengolahan Sinyal Geomagnetik di Regional Lombok dengan Metode Fraktal

Kanata

Zubaidah²,

Kusdiah³

2020

D.K.

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Pulau Lombok merupakan salah satu pulau di Indonesia dengan tingkat aktivitas kegempaan yang tinggi, karena Indonesia sendiri berada pada cincin api. Gunung Rinjani merupakan gunung berapi aktif yang dapat dikaitkan dengan kegempaan di pulau tersebut yang dapat mempengaruhi perubahan medan geomagnetik dalam hal ini bisa menimbulkan anomali geomagnetik. Berdasarkan hal tersebut maka dilakukan penelitian terhadap dimensi fraktal sinyal geomagnetik di wilayah Lombok menggunakan data observatorium Kupang (KPG), Kakadu (KDU) dan Guam (GUA) untuk menentukan anomali yang dapat diduga sebagai prekursor gempa bumi. Dimensi fraktal pada gempa merusak terlihat pada rentang waktu 12-43 hari sebelum kejadian gempa dan 5-46 hari untuk gempa kecil dan besar dimensi fraktal linear terhadap jarak gempa ke observatorium.

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Lesser Sunda Islands Earthquake Inter-occurrence Times Distribution Modeling

Cited by 7 publications

References 8 publications

Reliability Study of Spectral Acceleration Designs Against Earthquakes in Bengkulu City, Indonesia

Reliability Study of Spectral Acceleration Designs Against Earthquakes in Bengkulu City, Indonesia

An update to seismic hazard levels and PSHA for Lombok and surrounding islands after earthquakes in 2018

Pengolahan Sinyal Geomagnetik di Regional Lombok dengan Metode Fraktal

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