Distribusi Coulomb Stress Akibat Gempabumi Tektonik Selatan Pulau Jawa berdasarkan Data Gempa Tektonik 1977-2000

Puspasari, Fitri; Wahyudi, W

doi:10.12962/j24604682.v13i2.2745

Cited by 3 publications

(3 citation statements)

References 1 publication

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“…Apart from Sumatra, we also carried out coulomb stress calculations on the island of Java. The result of data processing is that there is an increase in Coulomb stress in the southern region of Java Island with a value range of 0.01-1 kPa and is thought to cause stress accumulation due to tectonic earthquakes that point downward on the peak of Merapi volcano (Puspasari & Wahyudi, 2017).…”

Section: Changes In Coulomb Stress From 2011-2021mentioning

confidence: 99%

Analysis of Coulomb Stress Changes in Aceh Earthquake on Sibayak Volcano

Sinaga

Loeqman²,

Siagian

et al. 2022

J. Pendidik. Fis. Teknol.

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Based on geological conditions, Indonesia is located between the Indo-Australian plate, the Eurasian plate, and the Pacific plate, making Indonesia prone to tectonic earthquakes. However, since the big earthquake that occurred in Aceh on December 26, 2004, the geological conditions in Sumatra have undergone significant changes marked by stressful situations in the western to southern regions of Sumatra, especially on Sibayak Volcano. This study used data from BMKG and Global CMT, which included magnitude (Mw), depth, earthquake coordinates (longitude and latitude), type of earthquake, strike, dip, and rake. From the analysis using Coulomb 3.3, the highest coulomb stress value of Sibayak Volcano was obtained in 2015 with an average change in coulomb stress of 0.235 bar, shear 0.1909 bar, normal 0.1106 bar. However, the lowest coulomb stress value occurs in 2021 with a moderate shift in coulomb stress of 0.0593 bar, shear 0.0251, normal 0.0849 bar.

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Section: Changes In Coulomb Stress From 2011-2021mentioning

confidence: 99%

Analysis of Coulomb Stress Changes in Aceh Earthquake on Sibayak Volcano

Sinaga

Loeqman²,

Siagian

et al. 2022

J. Pendidik. Fis. Teknol.

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“…A widely used model for explaining fault interactions is the Coulomb stress change. Fault interactions and triggering caused by earthquake rupture have been studied in Indonesia in the past few years, such as Aceh earthquake [2], tectonic earthquake around Merapi volcano [3], and tectonic earthquake around Gamalama and Soputan volcano [4]. Increasing Coulomb stress places on the region most likely to identify aftershocks in the days following a mainshock.…”

Section: Introductionmentioning

confidence: 99%

Coulomb Stress Analysis of Halmahera Earthquake on June 7th 2016, Mw=6.3 and Its Correlation with Aftershocks

Pratikno¹,

Rachman²,

Santosa³

2019

JTS

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The activity of the Pacific plate, Eurasia plate and Indo-Australia plates trigger some earthquake around Halmahera. The purpose of the current study was to determine the Coulomb stress change of the main earthquake and predict the aftershocks' location around it. For understanding an interaction of the faults, this study used Coulomb stress change model. Three component seismic waveform data recorded by TNTI station within 132 km, SANI station within 381.2 km, LUWI station within 478.3 km, and TOLI2 station within 617.6 km of the epicenter. This study used software ISOLA-GUI to obtain the parameters of the earthquake source. The parameters of the earthquake source were then used to determine fracture orientation, length, width and slip displacement. It was also used to calculate the Coulomb stress changes around the main shock, using software Coulomb 33. The result shows that the orientation of the earthquake fault has a dip angle of 48° to the horizontal plane and has a strike of 210° against the North. The fault length is 19.49 km, the fault width is 11.59 km and slip displacement is 49.43 cm. Based on plotting result, the main earthquake in Northern Molucca on June 7th, 2016 has positive Coulomb stress change that spread across the Northeast to the Southwest. This change is likely triggered three aftershocks with a range of Mw 4.7 to 6.2.

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“…shows a geological map showing the rock structure of the island of Flores, which is generally igneous type. Coordinate system of static stress calculation[3],[4] …”

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confidence: 99%

Estimation of the Source Parameters of the Flores Earthquake and Their Correlation to Aftershocks

Santosa

2019

IJOE

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This study uses data provided by BMKG Indonesia which is downloaded from the website www.webdc.eu. The data processing is done by using some software, one of them is Matlab to run Isola software. The software provides information about the fault direction. In addition, this study also uses Coulomb 3.3 software to provide information on subsequent earthquake forecasts. The results showed that the earthquake that occurred on 27th February 2015 gave impact to Coulomb's increase and decrease of stress to some areas in the northern mainland of Flores. The impact of this major earthquake is expected to trigger an earthquake that occurred in northern Flores. Based on the results of data processing obtained form focal mechanism is oblique reverse with the first nodal value strike 139, dip 73, and rake 50. While on the second nodal has a strike value 30, dip 43, and rake 154. Main earthquake impact Coulomb stress increase of 0.15-0.2 bar. Meanwhile, Coulomb stress result obtained shear value-18.890, normal-0.217, and Coulomb-19.976.

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Distribusi Coulomb Stress Akibat Gempabumi Tektonik Selatan Pulau Jawa berdasarkan Data Gempa Tektonik 1977-2000

Cited by 3 publications

References 1 publication

Analysis of Coulomb Stress Changes in Aceh Earthquake on Sibayak Volcano

Analysis of Coulomb Stress Changes in Aceh Earthquake on Sibayak Volcano

Coulomb Stress Analysis of Halmahera Earthquake on June 7th 2016, Mw=6.3 and Its Correlation with Aftershocks

Estimation of the Source Parameters of the Flores Earthquake and Their Correlation to Aftershocks

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