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Tsunamis there are relatively rare despite earthquakes being relatively frequent in Indonesia. The last major tsunami was caused by the 1883 eruption of Krakatoa. Not every earthquake produces large tsunamis: on 28 March 2005, a magnitude 8.7 earthquake hit roughly the same area of the Indian Ocean but did not result in a major tsunami.
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 2005 Nias–Simeulue earthquake occurred on 28 March off the west coast of northern Sumatra, Indonesia in the subduction zone of the Sunda megathrust. At least 915 people were killed, mostly on the island of Nias. It was among the top 10 most powerful recorded worldwide since 1900, [4] with a magnitude of 8.6 that caused a relatively small ...
There is a large number of smaller natural disasters in Indonesia each year which often lead to deaths of 10 or 20 people or more. For example, landslides (tanah longsor) are very common in upland areas, especially during the rainy season, and cause much local damage and deaths. [6] Flooding is also a regular problem across many parts of Indonesia.
The western districts of Aceh, lying nearest the epicenter of the magnitude 9.2 earthquake that caused the tsunami, were a "roadless" area, according to UN Emergency Coordinator Jan Egeland. "The lack of access by road is a key problem aid agencies face in the northern and western parts of Aceh," Chris Lom, a spokesman in the region for the ...
The 2012 Indian Ocean earthquakes were magnitude 8.6 and 8.2 M w undersea earthquakes that struck near the Indonesian province of Aceh on 11 April at 15:38 local time. . Initially, authorities feared that the initial earthquake would cause a tsunami and warnings were issued across the Indian Ocean; however, these warnings were subsequently can
The earthquake caused major soil liquefaction in areas in and around Palu. [16] In two locations this led to mudflows in which many buildings became submerged causing hundreds of deaths with many more missing. [17] The liquefaction was considered to be the largest in the world and was deemed as rare. [18] [16]
The island of Java is the most densely populated island on Earth, and is vulnerable to both large earthquakes and volcanic eruptions, due to its location near the Sunda Trench, a convergent plate boundary where the Australian tectonic plate is subducting beneath Indonesia. Three great earthquakes occurred in the span of three years to the ...