Rupture behavior of the 2017 MW6.6 Poso earthquake in Sulawesi, Indonesia

Sianipar, Dimas; Daniarsyad, Gatut; Priyobudi, P.; Heryandoko, Nova; Daryono, D.

doi:10.1016/j.geog.2021.07.002

Cited by 8 publications

(4 citation statements)

References 16 publications

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“…For the average value of coulomb stress changes, Sorik Marapi in 2017 has an average value of coulomb stress changes that are different from the Deli Serdang [33] and Poso [34]. The average value of Sorik Marapi's coulomb stress change in 2017 was 0.131 bar.…”

Section: Results and Discussion Coulomb Stress Changes From 2011-2021mentioning

confidence: 97%

“…This is because the value of changes in coulomb stress in Deli Serdang is still not averaged with shear or normal values. Meanwhile, the value of the change in coulomb stress that occurred in Poso was >0.2 bar [34]. This is also because the number of earthquakes that occur around Poso is not as many as the earthquakes that occur around Mount Sorik Marapi.…”

Section: Results and Discussion Coulomb Stress Changes From 2011-2021mentioning

confidence: 97%

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Coulomb Stress Change of the 2004 Aceh Earthquake on Mount Sorik Marapi 2021

Sinaga

Tambunan

Loeqman

et al. 2021

J. Penelit. Fis. Apl.

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Sorik Marapi is an active volcanic mountain with an altitude of 2,145 meters located in Batang Gadis National Park, Sibanggor Julu Village, Mandailing Natal Regency, North Sumatra, Indonesia. Since the earthquake in Aceh on December 26, 2004, geological conditions in the western part of Sumatra Island have increased in stress. This affects the volcano in Sumatra, Mount Sorik Marapi, so it needs to be studied to find out the condition of changes in coulomb stress in Sorik Marapi. The method used in this study is a descriptive method with an analysis of the coulomb stress method. From the Aceh earthquake year of December 2004 to 2021, Mount Sorik Marapi experienced the highest average increase in coulomb stress in 2012, which was 0.171 bars. The highest average increase in shear in 2015 was 0.25 bars, and the highest average normal increase in 2018 was 0.202 bars. While at depth, Sorik Marapi mountain experienced an average change in coulomb stress highest of 0.368 bars, the average increase in the highest shear by 0.269 bars, and the average normal increase of 0.246 bars. All such increases are at a depth of 90 km below sea level. Based on the results of this study, it is stated that Mount Sorik Marapi experiences inconsistent changes in coulomb stress every year.

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Section: Results and Discussion Coulomb Stress Changes From 2011-2021mentioning

confidence: 97%

Section: Results and Discussion Coulomb Stress Changes From 2011-2021mentioning

confidence: 97%

Coulomb Stress Change of the 2004 Aceh Earthquake on Mount Sorik Marapi 2021

Sinaga

Tambunan

Loeqman

et al. 2021

J. Penelit. Fis. Apl.

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“…The largest earthquake (6.6 Mw) in this zone occurred on 29 May 2017, with a southwestdipping normal mechanism (Wang et al, 2019;Daniarsyad et al, 2021;Sianipar et al, 2021).…”

Section: Shallow Part (<60 Km)mentioning

confidence: 99%

Seismotectonics of Sulawesi, Indonesia

Serhalawan¹,

Chen

2023

Preprint

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In eastern Indonesia, Sulawesi Island lies at the triple junction of the Australian, Sunda, and Phillippine Sea plates. The distinctive K-shape of Sulawesi, consisting of four arms (North, South, East, and Southeast), resulted from continuous geological evolution at different stages. Consequently, each arm has a different deformation style and tectonic setting. We studied the seismotectonics of Sulawesi using the updated dataset for earthquake seismicity and focal mechanisms, including additional supporting data. We grouped Sulawesi shallow part (< 60 kilometers) into six regions, while the deep part (60-400 kilometers) related to the Celebes Sea and Sula slabs. Regarding the shallow part, we found a lack of seismicity in the northern Palu-Koro fault and near the center of the North Sulawesi Trench, although these zones have high slip rates. On the deep part, the Celebes Sea slab showed an increasing dip as depth increased, whereas the Sula slab showed a steeply dipping slab. Moreover, the western Sula slab indicated an absence of shallow depth earthquakes (60–230 kilometers). Based on our investigations, we derived the following well-founded conclusions: (1) The northern Palu-Koro fault was beyond the high relative motion of the Makassar and North Sula blocks, resulting inactive seismicity. (2) A seismic gap or aseismic slip from the Celebes Sea subduction probably produced the low seismicity level near the center of the North Sulawesi Trench. (3) The shallow inactive seismicity in the western Sula slab might be due to the upper slab detaching during the first stage collision in the Early Miocene.

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“…The potential for disasters is exacerbated by global climate change, which has become an international issue recently (Haggag, Yosri, El-Dakhakhni, & Hassini, 2022;Hansen, 2022). Indonesia's latest disaster was Poso Earthquake, with a magnitude of 6.6 MW carrying extraordinary effects on land and settlements (Sianipar, Daniarsyad, Priyobudi, Heryandoko, & Daryono, 2021). Furthermore, the relatively substantial change in Sulawesi's land use also has the potential to trigger floods and landslides (Yulianto et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

Evaluation of land resilience against natural disasters using ecosystem services approach in Kendari City, Southeast Sulawesi, Indonesia

Restele

Saleh

Iradat

et al. 2022

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Kendari City has multiple disasters hazard, especially floods and landslides. Consequently, the city requires systematic preventive efforts to minimize the potential disaster risk. This study aims to create a spatial model to determine the resilience of the land against floods and landslides with an ecosystem services approach. We used Sentinel-2 and DEMNAS (National Digital Elevation Model of Indonesia) as our primary data collection tools. Sentinel-2 was used to compile land use maps, and DEMNAS was the basis for compiling landform maps. The integration of the two was carried out by the analytic hierarchy process (AHP). The results showed that 8,259.98 acres (30.01 percent) of land in Kendari had low resilience to disasters. Those areas are located in a residential area on the TWH (Rocky hill over mixed sedimentary rocks) and KHY (Coalescent estuarine/riverine plain) landforms. The dominant disaster hazard in the area is inundation flooding that occurs almost every year in Kendari. Poor soil infiltration capacity is one factor affecting the area become vulnerable to flooding.

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Rupture behavior of the 2017 MW6.6 Poso earthquake in Sulawesi, Indonesia

Cited by 8 publications

References 16 publications

Coulomb Stress Change of the 2004 Aceh Earthquake on Mount Sorik Marapi 2021

Coulomb Stress Change of the 2004 Aceh Earthquake on Mount Sorik Marapi 2021

Seismotectonics of Sulawesi, Indonesia

Evaluation of land resilience against natural disasters using ecosystem services approach in Kendari City, Southeast Sulawesi, Indonesia

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