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The Great Sumatran fault, also known as Semangko fault, is a large strike-slip fault running the entire length of the island of Sumatra.This Indonesian island is located in a highly seismic area of the world, including a subduction zone off the west coast of the island.
The tectonics processes in Indonesia formed major structures in Indonesia. The most prominent fault in the west of Indonesia is the Semangko Fault or the Great Sumatran Fault, a dextral strike-slip fault along Sumatra Island (about 1,900 km). The formation of this fault zone is related to the subduction zone in the west of Sumatra.
Citarik Fault [3] Cimandiri Fault; Baribis Fault; Cirata Fault; Cugenang Fault [4] Lembang Fault; Cileunyi-Tanjungsari Fault [5] Southern Garut Fault; Citanduy Fault; Kendeng Fault; Ajibarang Fault [6] Merapi-Merbabu Fault; Opak Fault; Pati Fault; Muria Fault [7] Rawapening Fault; Kaligarang Fault [8] Rembang-Madura-Kangean-Sakala Fault ...
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The Great Sumatran fault is a 1,900 km (1,200 mi) strike-slip fault system located on the island of Sumatra. The fault is divided into about 20 segments. [6] The Great Sumatran fault was the source of the 1994 Liwa and 1995 Kerinci earthquakes. It produced its largest earthquake during the 1943 Alahan Panjang sequence; measuring M s 7.8. [7]
Indonesia straddles the so-called "Pacific Ring of Fire," an area of high seismic activity where multiple tectonic plates meet. (Reporting by Ananda Teresia; Editing by Michael Perry) Show comments
At the southeast section of this area, the Sumatra fault zone bends towards south and merges into the extensional south striking fault system of the Sumatra trait. The Sumatra Trench near the northwestern and western parts of Sumatra are defined as a high hazard region where 6.0 and 7.0 Mw magnitude earthquakes can generate quite often, i.e ...