6.3 earthquake - Gulf of Alaska, 18 mi southwest of Hinchinbrook Island, Valdez-Cordova County, Alaska, USA, on Saturday, 28 Mar 1964 2:49 pm (GMT +0) Quake Data | Interactive map | User Reports | Aftershocks | Earlier quakes in same area | Quakes in the US | Alaska | Alaska | Washington D.C. may cause changes of seafloor depth that generate transoceanic tsunamis. So why do we report that the earthquake occurred at a depth of 0 km or event as a negative depth sometimes? The Great Alaskan Earthquake was a 9.2 magnitude subduction zone (megathrust) earthquake located at a depth of approximately 25 kilometres. Five-story J.C. Penney Building, 5th Avenue and Downing Street, Anchorage, Alaska, partly collapsed by the March 28, 1964 earthquake. The epicenter was 75 miles east of Anchorage in the Prince William Sound. Most of the area was razed and made an urban renewal district. The second largest earthquake of the 20th Century and the largest ever recorded in the northern hemisphere,occurred in Alaska on March 27, 1964 (3/27/64 05:36:14.0 p.m., local time; 3/28/64 03:36:14.0 GMT). The rapture lasted for about 4.5 minutes making it the … The great Alaska earthquake of 1964, Volume 3, Part 2, National Research Council (U.S.). Very strong magnitude 6.3 earthquake at 13 km depth. Depth: 25 kilometers (16 mi) Epicenter: 60°54′29″N 147°20′20″W / 60.908°N 147.339°W / Type: Megathrust: Areas affected: United States, Canada: Total damage: $311 million (1964 USD) Max. intensity: XI (Extreme) Peak acceleration: 0.18 g: Tsunami: Major. The 1964 earthquake caused wide-spread damage to inhabited places throughout more than 60,000 square miles of south-central Alaska. Very strong magnitude 6.4 earthquake at 13 km depth. Committee on the Alaska Earthquake, National Academy of Sciences, ISBN 0-309-01606-1. Strong mag. Alaska earthquake (South-central Alaska, US, 1964) March 27, 1964 brought with it a 9.2-moment magnitude earthquake to the Prince William Sound areas of Alaska. Note undamaged buildings nearby. What was the largest earthquake in Alaska? We apologize, this video has expired. Though earthquakes are common in Alaska, they often occur out at sea. 1964 Great Alaska Earthquake Archive In Honor of Dr. George Plafker. "Consumer Price Index, … of slip, or relative motion, between opposite sides of the earthquake fault. The M9.2 Alaska earthquake of 1964 caused major damage to the port facilities and town of Valdez, most of it the result of submarine landslide and the consequent tsunamis. The southern edge of one of several landslides in Anchorage, this one covered an area of over a dozen blocks, including five blocks along the north side of Fourth Avenue. The 1960 Valdivia earthquake (Mw 9.5), 1964 Alaska earthquake (Mw 9.2), 2004 Indian Ocean earthquake (Mw 9.2), and 2011 Tōhoku earthquake (Mw9.0) are recent examples of powerful megathrust earthquakes that generated tsunamis (known as teletsunamis) that can cross entire oceans. Very strong mag. The 1964 earthquake, with a magnitude of 9.2, was the largest earthquake in American history and the second largest to ever be recorded anywhere in the world. The rupture originated at a depth of 15.5 miles, and the fault rupture plane extended 500 miles long and 125 mile wide. Many houses, buildings and infrastructures were damaged or … The earthquake had a magnitude 9.2 (Moment Magnitude) and caused extensive damage in Alaska. The focal depth corresponds, how ever, to the base of the granitic layer defined by Woollard's analysis of the crustal measure ments made by the Carnegie Institution. The close-in effects were even more striking, however; sediment-laden ground water erupted at the surface, and even ice-covered lakes and streams responded by seiching. Landslide and slumping effects in the Turnagain Heights area, Anchorage, Alaska, caused by the March 28, 1964, earthquake. 6.4 earthquake - Gulf of Alaska, 16 mi southwest of Hinchinbrook Island, Valdez-Cordova, Alaska, USA, on Saturday, 28 Mar 1964 2:47 pm (GMT +0) Quake Data | Interactive map | User Reports | Aftershocks | Earlier quakes in same area | Quakes in the US | Alaska | Alaska. [3] The earthquake started around 15.5 miles underground, with the epicenter about 74 miles east of Anchorage, 6 miles east of the Fiord College, and 55 miles west of Valdez. An earthquake cannot physically occur at a depth of 0 km or -1km (above the surface of the earth). On the afternoon of Good Friday, March 27, 1964, the strongest earthquake recorded in North America, and the second strongest ever recorded, occurred in Alaska. Largest ever earthquake by magnitude-2nd: 1964 Alaska Earthquake-3rd: Rat Islands, Alaska. The Great Alaska Earthquake remains the strongest recorded earthquake to strike North America, and it is the world's second strongest (after the 1960 M9.5 quake that struck Chile). Close-up of Government Hill elementary school, which was … Very strong mag. National Oceanic and Atmospheric Administration. The 9.2 magnitude earthquake had a depth of 25 kilometers, lasted 4 minutes and 38 seconds and killed nearly 131 people. 1964 Alaska earthquake; Fourth Avenue in Anchorage, Alaska, looking east from near Barrow Street. It is the second largest earthquake of the world in the 20th century. The earthquake had a surface-wave magnitude of 8.4, an epicenter of 61.1° N, 147.5° W, and a depth of 23 km. Run-up of 67 m (220 ft) at Shoup Bay, Alaska. 1964 Alaska Earthquake 9.2 6.2 earthquake - Gulf of Alaska (USA on Saturday, 28 March 1964 at 09:52 (GMT) Strong magnitude 6.2 earthquake at 25 km depth. 335 likes. The 1964 Alaskan earthquake, also known as the Great Alaskan earthquake and Good Friday earthquake, occurred at 5:36 PM AKST on Good Friday, March 27. Current estimates of the average slip along the are in the range of 30 feet, with some patches that slipped as much as 60 feet! Coastal forests plunged below sea level and were destroyed by salt water. ^ "Tsunami runups in Canada in 1964". Quake Data | User Reports | Aftershocks | Earlier quakes in same area. The 1964 earthquake was giant because during the earthquake and the large amount . Its far-reaching effects were recorded as water-level fluctuations in gages operated on water wells and streams. The estimated 25-mile depth of Alaska's big quake might have dissipated its energy, experts say. 1964 Alaska Earthquake Damage Photos. ^ Canadian inflation numbers based on Statistics Canada. In order for an earthquake to occur, two blocks of crust must slip past one another, and it is impossible for this to happen at or above the surface of the earth. 1964 Alaska Earthquake Changes the Coastline Geological surveys taken immediately afterward showed parts of the Alaskan coast sank up to eight feet, other parts rose up to 38 feet and much of the coast moved 50 feet towards the ocean. 1964 3/28 03:36 UTC 61.01N 147.62W 6km deep Mw=9.2, Prince William Sound, Alaska. Local tsunami waves triggered by this earthquake were extremely destructive in … 1964 Alaska Earthquake Changes the Coastline Geological surveys taken immediately afterward showed parts of the Alaskan coast sank up to eight feet, other parts rose up to 38 feet and much of the coast moved 50 feet towards the ocean.
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