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Jurnal RISET Geologi dan Pertambangan

Vol 31, No 2 (2021)

Irwan Meilano (Faculty of Earth Sciences and Technology, ITB)
Susilo Susilo (Geospatial Information Agency, Cibinong, Indonesia)
Endra Gunawan (Faculty of Mining and Petroleum Engineering, Institute of Technology Bandung (ITB), Bandung, Indonesia)
Suchi Rahmadani (Faculty of Earth Science and Technology, Institute of Technology Bandung (ITB), Bandung, Indonesia and Center for Earthquake Science and Technology, Institute of Technology Bandung (ITB), Bandung, Indonesia)

Publish Date
30 Dec 2021

On September 12, 2007, a M8.5 megathrust earthquake occurred along the Sunda trench near Bengkulu, West Sumatra. GPS data in Sumatra have indicated the coseismic and postseismic deformations resulting from this earthquake. Our estimate of coseismic displacements suggests that the earthquake displaced up to ~1.8m at GPS stations located north of the epicenter. Moreover, our principal strain estimation in the region suggests that the maximum coseismic extensional strain is ~40 ppm. Our analysis of GPS data in the region suggests that the postseismic decay of the 2007 Bengkulu earthquake was 46 days, estimated using a logarithmic function.

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