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This quake, together with the Great Alaskan earthquake (1964) and the Great Chilean earthquake (1960), account for almost half of the total moment. [35] [36] Since 1900, the only earthquakes recorded with a greater magnitude were the 1960 Chile earthquake (magnitude 9.5) and the 1964 Alaska earthquake in Prince William Sound (magnitude 9.2
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.
Although National Oceanic and Atmospheric Administration (NOAA) scientists at the Pacific Tsunami Warning Center (PTWC) in Hawaii eventually issued warnings of a possible tsunami from the large earthquake off Sumatra, the waves outran notification systems at jet speeds of 500 mph (804 km/h), catching hundreds of thousands of people unaware.
Tsunami warning canceled after 7.0 magnitude earthquake strikes off California coast December 5, 2024 at 11:05 AM Shake map shows areas south of Eureka, California experienced the most shaking.
“Drop, Cover, Hold on. Protect yourself,” the U.S. Geological Survey warned moment before the eathquake struck.
Shake map provided by the US Geological Survey of the earthquake. / Credit: USGS The earthquake was first registered as having a preliminary magnitude of 6.6, but USGS updated it to 7.0.
2005 Nias–Simeulue earthquake; 2007 Sumatra earthquakes; 2010 Banyak Islands earthquake; The seismicity of the Sumatra coast and the top six quakes ever recorded appear to be clustered in two time periods: a 12-year span between 1952 and 1964 and a 7-year span between the 2004 and 2011; however, this is understood as a statistical anomaly. [2]
Map of the Great Sumatran fault with labelled segments The March 2007 Sumatra earthquakes occurred near the northern end of Lake Singkarak in Sumatra , Indonesia , on March 6. The first shock in this earthquake doublet struck with a maximum Mercalli intensity of VIII ( Severe ) and the second shock that arrived two hours later had a maximum ...