Welcome to our blog

Hi all! Welcome to our blog, Tektonesiana. The name of Tektonesiana is derived from the word tectonics and Indonesia. Tektonesiana represents our ‘passion’ on tectonics of Indonesia. We, Indonesian geologists who share the same interest, use this blog to post articles that represent our works. These articles have been presented in scientific meetings. Some of them also have been published in journals. We have many questions … Lanjutkan membaca Welcome to our blog

Doubly Vergent Accretionary Wedge Active Tectonics in The Sumatra Subduction Zone

This is an abstract of a talk presented at American Geophysical Union, Fall Meeting 2011. Active deformation along the western margin of the present day Mentawai forearc basin appeared as anticlinal ridges. Beneath the anticlinal ridges, the deformation zone exhibits (1) main backthrust, as the upward continuation of the Mentawai Backthrust in forearc basin, (2) seaward verging imbricated thrusts developed in the accretionary wedge and … Lanjutkan membaca Doubly Vergent Accretionary Wedge Active Tectonics in The Sumatra Subduction Zone

Neotectonics of the southern Sumatran Forearc

This article notes the structural features in the Mentawai forearc that can be interpreted as products of compression of the accretionary wedge and forearc basin sediments. Compressional phases since the Late Miocene initiated (a) the landward vergent foldthrust belt in the Mentawai Fault Zone (MFZ), (b) reactivation of seaward vergent imbricated thrusts in the retro-accretionary wedge, and (c) uplift of the accretionary wedge and some … Lanjutkan membaca Neotectonics of the southern Sumatran Forearc

Seismic images of the megathrust rupture during the 25th October 2010 Pagai earthquake, SW Sumatra: Frontal rupture and large tsunami

This is a note from an article that has been published in Geophysical Research Letters, 2011. An earthquake of Mw = 7.8 occurred on the 25th October 2010, SW of Pagai Island, Sumatra. The earthquake generated an unexpected very large tsunami on Pagai Islands with run‐up height of up to 8 m. Here we present seismic reflection and bathymetry images from the 2010 epicentral region … Lanjutkan membaca Seismic images of the megathrust rupture during the 25th October 2010 Pagai earthquake, SW Sumatra: Frontal rupture and large tsunami