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Large numbers of earthquakes of smaller magnitude occur very regularly due to the meeting of major tectonic plates in the region. Based on the records of the USGS, Indonesia has had more than 150 earthquakes with magnitude > 7 in the period 1901–2019.
The thrust faults responsible for megathrust earthquakes often lie at the bottom of oceanic trenches; in such cases, the earthquakes can abruptly displace the sea floor over a large area. As a result, megathrust earthquakes often generate tsunamis that are considerably more destructive than the earthquakes themselves.
M w [37] The largest earthquake in recorded history. 1960 Valdivia earthquake: 13 October 1963 15:17 (local time) Kuril Islands, USSR (present-day Russia) 0 8.5 M w [38] One of the largest earthquake in recorded history. 1963 Kuril Islands earthquake: 27 March 1964 17:36 (local time) Prince William Sound, Alaska: 131 9.2 M w [39] The second ...
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]
Megathrust earthquakes in Sumatra (1 C, 7 P) Pages in category "Megathrust earthquakes in Indonesia" The following 8 pages are in this category, out of 8 total.
The 1629 Banda Sea earthquake struck the Banda Sea, Indonesia on August 1. Its epicentre is believed to have been in the Seram Trough . A megathrust earthquake caused a 15 m (49 ft) tsunami, which was recorded to have affected the Banda Islands about 30 minutes after the quake.
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 ...
If it were an intraslab earthquake occurring within the downgoing Australian plate as it subducts beneath the Sunda plate along the Sunda megathrust, the estimated moment magnitude (M w ) would be 7.4 to 8.0, with an epicenter near Batavia, and a focal depth of 100 km. [4] Modelling of the 1699 earthquake scenarios show that an intraslab ...