Английская Википедия:1958 Huslia earthquake
Шаблон:Short description Шаблон:Infobox earthquake
The 1958 Huslia earthquake on April 7 struck an unusual part of Alaska, near the city of Huslia, about 415 km from Fairbanks. The Шаблон:M 7.3[1] earthquake is one of two magnitude 7.0 or greater earthquakes recorded north of 65° latitude, the other being the 1933 Baffin Bay earthquake, and is one of the strongest earthquakes within the interior of the state.[2] The earthquake was a result of compression of the crust due to the subduction of the Pacific Plate under the North American Plate.[3]
Earthquake
Шаблон:See The earthquake was unusual for its location because it was situated in a geologically stable part of the North American Plate, more than 965 km from the Aleutian subduction zone; the nearest plate boundary. There are no known visible fault traces in the immediate vicinity of the earthquake other than a thrust fault under the Brooks Range and another strike-slip feature known as the Kaltag Fault. The Koyukuk Basin consists of accretion of volcanic arcs from the Middle Jurassic to Early Cretaceous. P-wave analysis suggests that the earthquake was a result of thrust faulting at a depth of 6 km.[4] The fault plane solution is either a shallow north-northwest dipping plane or a steep south-southwest dipping plane.[5] The earthquake was followed by two moderate aftershocks on April 8 and 12 respectively.[6][7]
Effects
Shaking from the earthquake reached VIII (Severe) on the Modified Mercalli intensity scale at its maximum within a radius of 40 to 50 miles. Meanwhile shaking in general was felt for an area of 150,000 square miles.[8] Ice cracks and liquefaction was reported for an area of 400 square miles. Pressure ridges, lakes thawing, and craters 20 feet across and 6 feet deep were reported during a survey. In Huslia, minor damage to roofs and foundations. An old building in Stevens Village was declared unsafe after it was seen that poles supporting its roof had split and broken. Ice from a frozen river cracked and ground fissures opened at Tanana. More damage was reported in other towns.[8]
See also
- List of earthquakes in 1958
- 1958 Lituya Bay, Alaska earthquake and megatsunami
- List of earthquakes in Alaska
References
Шаблон:Earthquakes in Alaska Шаблон:Earthquakes in the United States
