Analisa Anomali Gayaberat Terhadap Kondisi Tatanan Tektonik Zona Subduksi Sunda Megathrust Di Sebelah Barat Pulau Sumatera

Saraswati, Anita Thea; Anjasmara, Ira Mutiara

doi:10.12962/j24423998.v10i1.695

Cited by 2 publications

(3 citation statements)

References 3 publications

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“…Geological structures that cause significant gravitational effects by contrasting size and density (Götze & Pail, 2018). Gravity measurements can be carried out using gravity satellites that have broad observation areas, precision, spatial resolution, and high levels of spectral resolution and are not limited to topography (Saraswati & Anjasmara, 2010), such as The Gravity Field and Steady-State Ocean Circulation Explorer (GOCE).…”

Section: Introductionmentioning

confidence: 99%

“…A GOCE data study for geodynamics in the Indonesian region was conducted by Dewanto et al (2022) in West Sumatra; on Sumatra Island; Álvarez et al, (2021) in Sumatra and Andaman; Saraswati & Anjasmara (2010) in the Subduction Zone in the West of Sumatra Island. However, no one has yet conducted research on GOCE and EGM2008 data for the Eastern Indonesia region.…”

Section: Introductionmentioning

confidence: 99%

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Gravity Disturbance Analysis of Geodynamics In East Indonesia

Natul,

Pratama,

Shalihat

2023

JAGI

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Gravity satellites can be used for geodynamic studies in large and hard-to-reach areas. This study conducts gravity disturbance analysis from GOCE and EGM2008 satellite data for geodynamic interpretation in eastern Indonesia, the results of which are used as a basis for disaster mitigation. Gravity disturbance processing results from GOCE data with values around -300 to 260 mGal and EGM2008 with values around -350 to 450 mGal. Gravity disturbance maps of the GOCE and EGM2008 can clearly show fault patterns in the sea. However, the EGM2008 gravity disturbance map shows the fault pattern in the sea more clearly than the GOCE gravity disturbance map due to the higher spatial resolution of EGM2008 than GOCE. The cross-section of the GOCE and EGM2008 gravity disturbance maps represents the gravity signal of the study area; the GOCE graph represents the signal and forms the EGM2008 gravity disturbance signal components. The novelty of this research is related to the comparison of gravity disturbance maps from GOCE and EGM2008 data, which can be used to detect regional geological structures in eastern Indonesia.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Gravity Disturbance Analysis of Geodynamics In East Indonesia

Natul,

Pratama,

Shalihat

2023

JAGI

View full text Add to dashboard Cite

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“…The gravity method for geological studies is based on measuring variations in Earth's gravity caused by differences in the density of subsurface rocks (Telford et al, 1990). Gravity satellite data is able to provide information related to the redistribution of plates, atmosphere, mantle, hydrosphere, and the earth's centrosphere below the satellite orbit (Saraswati & Anjasmara, 2010).…”

Section: Introductionmentioning

confidence: 99%

A Comparison of Geologic Structure Detection of Sumatera Island Using Goce Satellite Gravity Data and Sgg-Ugm-2 Data

Natul

Heliani

2022

J. Geoscience Eng. Environ. Technol.

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GOCE gravity satellite data can be used for regional fault detection because the observation area is wide and not limited by area. In this study, GOCE satellite data is used to detect geological structures on the island of Sumatra, the results of which are used as the basis for disaster mitigation. GOCE data and SGG-UGM-2 were processed using the GOCE User Toolbox (GUT) software to produce a gravity disturbance map and a complete bouguer anomaly map. The GOCE obtained results were validated using the SGG-UGM-2 high-resolution gravity model data. The calculation results obtained that the gravity disturbance value from the GOCE data was around -140 to 200 mGal, while the value of the gravity disturbance from the SGG-UGM-2 data was around -180-300 mGal. The GOCE gravity disturbance map and the SGG-UGM-2 can detect the Subduction Trench, Mentawai Fault, and West Andaman Fault on Sumatra Island with negative values, while the Sumatran Fault Zone (SFZ) along Sumatra Island with positive values in line with the presence of mountain ranges. The results of the SGG-UGM-2 data processing for the gravity disturbance are more detailed than GOCE because the SGG-UGM-2 data degree is higher than that of GOCE. GOCE complete bouguer anomaly value is around 40-560 mGal, while the value of complete bouguer anomaly SGG-UGM-2 is around 60-560 mGal. The complete bouguer anomaly maps from GOCE and SGG-UGM-2 can detect patterns from the Subduction Trench, Mentawai Fault, and West Andaman Fault but cannot clearly detect SFZ. The complete bouguer anomaly can also detect differences between oceanic and continental crust. The GOCE and the SGG-UGM-2 complete bouguer anomaly map show almost similar patterns and the ability to detect geological structures for sub and regional Sumatra Island. In addition, GOCE data detect geological structures more clearly than GRACE data.

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Analisa Anomali Gayaberat Terhadap Kondisi Tatanan Tektonik Zona Subduksi Sunda Megathrust Di Sebelah Barat Pulau Sumatera

Cited by 2 publications

References 3 publications

Gravity Disturbance Analysis of Geodynamics In East Indonesia

Gravity Disturbance Analysis of Geodynamics In East Indonesia

A Comparison of Geologic Structure Detection of Sumatera Island Using Goce Satellite Gravity Data and Sgg-Ugm-2 Data

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