Andreanof n Aleutian islands, Alaska struck by 5.2 magnitude quake

July 8th, 2008 - 3:17 pm ICT by Bupha Ravirot  

Earth quake of 5.2 magnitude hits Andreanof and Aleutian island of Alaska region at Monday, July 08, 2008 at 22:43:54 UTC (01:43:54 PM (AHDT)

The earthquake was located at 51.916°N, 176.990°W at a depth of 93.7 km(58.2 miles). The earthquake is just 24 km W (279°) from Adak, 192 km W (262°) from Atka and 1940 km WSW (250°) from Anchorage of Alaska.

The Andreanof Islands The islands are particularly prone to earthquakes, often many with a magnitude of over 3 occur each day. They are a group of islands in the Aleutian Islands in southwest Alaska, located between Amchitka Pass and the Rat Islands group to the west, and Amukta Pass and the Islands of Four Mountains group to the east, at about 52° North and 172°57′ to 179°09′ West. The islands extend about 440 km. The total land area of all islands (including the Delarof Islands) is 3,924.737 km². The total population was 412 persons as of the 2000 census, the vast majority in the city of Adak on Adak Island.

The Aleutian Islands are a chain of more than 300 small volcanic islands forming an island arc in the Northern Pacific Ocean, occupying an area of 17,666 km² and extending about 1,900 km westward from the Alaska Peninsula toward the Kamchatka Peninsula. Crossing longitude 180°, they are the westernmost part of the United States. Nearly all the archipelago is part of Alaska and usually considered as being in the “Alaskan Bush”, but at the extreme western end the small, geologically-related, and remote Komandorski Islands, are in Russia. The islands, with their 57 volcanoes, are in the northern part of the Pacific Ring of Fire. The Alaska Marine Highway passes through the islands. Physiographically, they are a distinct section of the larger Pacific Border province, which in turn are part of the larger Pacific Mountain System physiographic division.

In 1957, Andreanof Islands earthquake was a magnitude 8.6 megathrust earthquake that took place on March 9, 1957, caused damage to infrastructure on Adak Island and Umnak Island, as well as causing an eruption of long-dormant volcano Mount Vsevidof. It also caused a tsunami that reached a height of 16 m (52 ft) and caused around $5,000,000 in damage in Hawaiʻi, destroying two villages on Oʻahu, and two bridges in the Aleutian region. No lives were lost in either the earthquake or the tsunami. The big earthquake Andreanof Islands took place again on December 19, 2007, with magnitude 7.2, a tsunami warning was issued. There were no reports of an actual tsunami or damage from the earthquake itself.

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