1958 Huslia earthquake

1958 earthquake in Alaska May 2025 February 2025 1958 Huslia earthquake 65.915 -156.343 type:event_region:US-AK inline,title Alaska 1958-04-07 15:30:45 884131 iscgem884131 April 7, 1958 7.3 s yes 6.0–7.0 km Thrust (intraplate) Northern Alaska Minor 8 Yes None The 1958 Huslia earthquake on April 7 struck an unusual part of Alaska, near the city of Huslia, about 415 km from Fairbanks. The s 7.3Hilary J. Fletcher Douglas H. Christensen A determination of source properties of large intraplate earthquakes in Alaska Pure and Applied Geophysics 1996 146 1 21–41 10.1007/BF00876668 1996PApGe.146...21F 129277876 https://link.springer.com/article/10.1007/BF00876668?noAccess=true subscription 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.24 June 2013 Preferred Magnitudes of Selected Significant Earthquakes https://earthquake.usgs.gov/data/sign_eqs.pdf 2 Dec 2020 United States Geological Survey The earthquake was a result of compression of the crust due to the subduction of the Pacific plate under the North American plate.WHY EARTHQUAKES HAPPEN IN ALASKA https://earthquake.alaska.edu/earthquakes/about 2 Dec 2020 Alaska Earthquake Center Earthquake Intraplate earthquake 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.Reiser Laura A Source Mechanism for the 7 April 1958 Huslia, Alaska Earthquake https://keckgeology.org/files/pdf/symvol/3rd/Earthquakes/reiser.pdf Third Keck Research Symposium in Geology The fault plane solution is either a shallow north-northwest dipping plane or a steep south-southwest dipping plane.Thomas E. Moore, Julie A. Dumoulin Geologic studies in Alaska by the U.S. Geological Survey, 1994 United States Geological Survey 1994 United States 75 The earthquake was followed by two moderate aftershocks on April 8 and 12 respectively.M 5.9 – northern Alaska https://earthquake.usgs.gov/earthquakes/eventpage/iscgem884139/executive 2 Dec 2020 United States Geological SurveyM 5.9 – northern Alaska https://earthquake.usgs.gov/earthquakes/eventpage/iscgem884183/executive 2 Dec 2020 United States Geological Survey 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.Jerry L. Coffman, Carl A. von Hake EARTHQUAKE HISTORY OF THE UNITED STATES U.S. DEPARTMENT OF COMMERCE 1977 United States 116–117 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. See also 1958 Lituya Bay, Alaska earthquake and megatsunami List of earthquakes in 1958 List of earthquakes in Alaska References Category:1958 earthquakes Category:Earthquakes in Alaska Huslia earthquake Category:1958 in Alaska Huslia earthquake