Rat Islands Earthquake(1965) – 8.7. It was formerly considered a part of the North American Plate, but recent studies indicate that it is an independent plate, bounded on the north by the North American Plate. The 1965 Rat Islands earthquake occurred at 05:01 UTC, on 4 February (19:01, 3 February local time). Here, the Pacific Plate is being subducted under the North American Plate at a dip angle of nearly 45°. The Rat Islands form part of the Aleutian Islands, a chain of volcanic islands forming an island arc, that results from the subduction of the Pacific Plate beneath the North American Plate. The tsunami gave rise to the S'mong legend, which is credited with saving many lives during the 2004 earthquake. This plate boundary, the Alaska-Aleutian megathrust, has been the location of many megathrust earthquakes. Amchitka is the island closest to the epicenter of the main shock. This megathrust earthquake also triggered a devastating tsunami that caused damage along the Gulf of Alaska, the West Coast of the United States, and in Hawaii. For terms and use, please refer to our Terms and Conditions The great Rat Islands underthrusting earthquake (M w = 8.7), of February 4, 1965, represents subduction of the Pacific plate beneath the North American plate along a 600‐km segment of the western end of the Aleutian Islands.Body wave inversion techniques are used to determine the spatial and temporal heterogeneities associated with the Rat Islands earthquake. The sharp boundary conditions of the epicenter locations suggest block faulting about the Rat Islands as a subsystem of the Aleutian Islands arc structure. Event ids that are associated to the earthquake: us7000cmlk. This event may have been triggerred by the large displacement near the mainshock epicenter. 5.8 earthquake - Rat Islands, Aleutian Islands, Alaska (USA), on Thursday, 18 February 1965 at 23:13 (GMT) Moderate magnitude 5.8 earthquake at 40 km depth. ©2000-2020 ITHAKA. The 1907 Sumatra earthquake occurred on January 4 at 05:19:12 UTC. The rate of closure is 7.5 centimetres (3 in) per year. It was also observed in Peru, Ecuador, Mexico, California, Japan and eastern Russia. This item is part of JSTOR collection The 1965 Rat Islands earthquake share common features with the 1963 Kuril Islands earthquake and the 1964 Alaska earthquake.. Earthquake. Journal of Geophysical Research: Solid Earth. An extended series of websites includes comprehensive career development resources. The earthquake was associated with a 600 km long rupture along the plate boundary, based on the distribution of aftershocks. Quake Data | User Reports | Aftershocks | Earlier quakes in same area. West Andaman Fault is a major north–south trending strike-slip fault zone that forms the boundary between the forearc, developed above the highly oblique subduction zone between the Indian Plate and the Burma Plate, and the Andaman Sea. This megathrust earthquake also triggered a devastating tsunami that caused damage along the Gulf of Alaska, the West Coast of the United States, and in Hawaii. The 1797 Sumatra earthquake occurred at 22:00 local time on February 10. The Rat Island earthquake of February 4, 1965 (origin time 05h 01m 21.8s, h = 40 km), is one of the largest earthquakes recorded in recent years. A tsunami warning has not been … Flooding from the tsunami caused $10,000 worth of damage on Amchitka Island. In 1965, 1969, and 1971, the U.S. Department of Defense and the Atomic Energy Commission conducted underground nuclear tests on Amchitka Island. [6], The tsunami had a maximum run-up height of 10.7 m on Shemya Island, 2.0 m at Amchitka Island, 1.6 m at Attu Island and 1.1 m in northern Kauai, Hawaii. All Rights Reserved. This earthquake belongs to a category of earthquakes with slow rupture velocities and potential of producing tsunamis larger than those expected from the moment magnitudes. Stolzenburg, William (2012). The tsunami was generated by a major earthquake in the Pacific Ocean, 130 kilometers (81 mi) from the shore of Kamchatka, with an estimated magnitude of 9.0. Earthquake frequency of occurrence in time and magnitude are given. Figure 2 shows the frequency of occurrence of aftershocks of the Rat Island earthquake of 4 February 1965, for the period 4 February to 20 March 1965. 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 Mw . Earthquakes of … The boundary is a left-lateral moving transform fault, the Ulakhan Fault. The online Science Multimedia Center features Science Podcasts, images and slide shows, videos, seminars, and other interactive features. This earthquake could be strongly felt in parts of Northern Sumatra, including Padang and Medan. Body wave inversion techniques are used to determine the spatial and temporal heterogeneities associated with the Rat Islands earthquake. Earthquake frequency of occurrence in time and magnitude are given. Published 51 times a year, Science is renowned for its highly cited, peer-reviewed research papers, its special strength in life science disciplines, and its award-winning coverage of breaking science news. 1). [2] Minor damage from the earthquake was recorded on both Attu and Shemya islands in the form of cracks in runways. It had a magnitude of 8.7 and triggered a tsunami of over 10 m on Shemya Island, but caused very little damage. This plate boundary, the Alaska-Aleutian megathrust, has been the location of many megathrust earthquakes. It caused a large tsunami that flooded the southwestern coast of the island. Sumatra Earthquake (2004)– 9.1. The low observed intensity compared to the size of the tsunami has led to its interpretation as a tsunami earthquake. The entire wiki with photo and video galleries for each article Feb 4, 1965: Magnitude 8.7 quake in the Rat Islands, Alaska caused a 10.7-m-high tsunami on Shemya Island and no loss of life. The earthquake was felt as far away as the Malay peninsula and the eastern part of Java. [1] This was not an aftershock, but a normal fault event within the outer rise of the subducting plate, triggered by the earlier event. For more information, access www.aaas.org. JSTOR is part of ITHAKA, a not-for-profit organization helping the academic community use digital technologies to preserve the scholarly record and to advance research and teaching in sustainable ways. 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