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Variation of seismicity with depth across the Sunda Trench subduction zone, low-angle part is the Sunda megathrust – 2007 Bengkulu earthquakes mainshock shown by star. The Sunda megathrust is a fault that extends approximately 5,500 km (3300 mi) from Myanmar (Burma) in the north, running along the southwestern side of Sumatra, to the south of Java and Bali before terminating near Australia. [1]
Plate tectonic setting of Sunda megathrust USGS map showing rupture area of the 1833 quake. The 1833 Sumatra earthquake occurred on November 25 at about 22:00 local time, with an estimated magnitude in the range of 8.8–9.2 M w . It caused a large tsunami that flooded the southwestern coast of the island. There are no reliable records of the ...
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The west coast of Sumatra is dominated by the Sunda megathrust; a 5,000 km long convergent boundary where the Australian plate subducts beneath the Burma plate and Sunda plate at a rate of 60 mm/yr. [3] Convergence along this plate boundary is highly oblique, severely deforming the overriding Sunda plate, where it is accommodated by the strike-slip motion along the Great Sumatran fault.
The Sunda Strait segment has the potential to trigger a large earthquake with a magnitude of 8.7 or higher. Prolonged inactivity in this section and the lack of historical record that might indicate any major subduction-type earthquakes signals the potential of a megathrust event in the Sunda Strait that can affect southern West Java and Sumatra.
UTC time: 2010-10-25 14:42:22: ISC event: 15264887: USGS-ANSSComCat: Local date: 25 October 2010 (): Local time: 21:42:22: Magnitude: 7.8 M w: Depth: 12.8 miles (20.6 km) Epicenter: 1] [2]: Fault: Sunda megathrust: Type: Thrust fault: Areas affected: Indonesia: Max. intensity: MMI V (Moderate) [1]: Casualties: 408 dead + 303 missing [3]: The 2010 Mentawai earthquake occurred with a moment ...
5 Lesser Sunda Islands. 6 Maluku Islands. 7 Papua. ... Download QR code; Print/export ... Sunda megathrust; North Sulawesi Trench;
The northern section of the Sunda megathrust ruptured over a length of 1,300 km (810 mi). [22] The earthquake (followed by the tsunami) was felt in Bangladesh, India, Malaysia, Myanmar, Thailand, Sri Lanka and the Maldives. [32] Splay faults, or secondary "pop up faults", caused long, narrow parts of the seafloor to pop up in seconds.