1964 Alaska earthquake

Second most powerful earthquake in recorded history May 2025 February 2025 1964 Alaska earthquake AlaskaQuake-FourthAve.jpg Fourth Avenue in Anchorage, Alaska, looking east from near C Street. 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. Most of the area was razed and made an urban renewal district. USA Alaska 1964-03-28 03:36:16 869809 iscgem869809 1964 3 27 17:36:16 AKSTTime At the time of the disaster, Alaska was divided between four separate time zones, Anchorage was five hours behind Eastern Standard Time. See Time in Alaska. w y 9.2–9.3 0.14-0.18 gNational Research Council (U.S.). Committee on the Alaska Earthquake (1972). The Great Alaska Earthquake of 1964, Volume 6: Engineering. Washington DC: National Academy of Sciences. p. 274, 285. 25 km us 4–5 minutes United States, Canada 60.9079 -147.3389 type:event_globe:earth_region:US-AK ti Megathrust Major. Run-up of 67 m ft on at Shoup Bay, Alaska. X 139 deaths $311 million (1964 USD) [$2.94 billion (2022 USD)] The 1964 Alaska earthquake, also known as the Great Alaska earthquake and Good Friday earthquake, occurred at 5:36 PM AKST on Good Friday, March 27, 1964.M 9.2 - The 1964 Prince William Sound, Alaska Earthquake: Overview, USGS Earthquake Hazards Program. Across south-central Alaska, ground fissures, collapsing structures, and tsunamis resulting from the earthquake caused about 139 deaths. Lasting four minutes and thirty-eight seconds, the magnitude 9.2–9.3 megathrust earthquake remains the most powerful earthquake ever recorded in North AmericaIchinose Gene Somerville Paul Thio Hong Kie Graves Robert O'Connell Dan 2007 Rupture process of the 1964 Prince William Sound, Alaska, earthquake from the combined inversion of seismic, tsunami, and geodetic data https://agupubs.onlinelibrary.wiley.com/doi/10.1029/2006JB004728 Journal of Geophysical Research: Solid Earth 112 B7 B07306:1–21 10.1029/2006JB004728 subscriptionISC-GEM Global Instrumental Earthquake Catalogue (1904–2018) http://www.isc.ac.uk/iscgem/index.php ISC 2022 International Seismological Centre Version 9.1 and the second most powerful earthquake ever recorded in the world since modern seismography began in 1900. USGS Earthquake Hazards Program M9.2 Alaska earthquake and tsunami of March 27, 1964 2025-02-15 https://earthquake.usgs.gov/earthquakes/events/alaska1964/ 600 mi In of fault ruptured at once and moved up to 60 ft, releasing about 500 years of stress buildup. Soil liquefaction, fissures, landslides, and other ground failures caused major structural damage in several communities and much damage to property. Anchorage sustained great destruction or damage to many inadequately earthquake-engineered houses, buildings, and infrastructure (paved streets, sidewalks, water and sewer mains, electrical systems, and other man-made equipment), particularly in the several landslide zones along Knik Arm. 200 mi In southwest, some areas near Kodiak were permanently raised by 30 ft m 0. Southeast of Anchorage, areas around the head of Turnagain Arm near Girdwood and Portage dropped as much as 8 ft m, requiring reconstruction and fill to raise the Seward Highway above the new high tide mark. In Prince William Sound, Port Valdez suffered a massive underwater landslide, resulting in the deaths of 32 people between the collapse of the Valdez city harbor and docks and inside the ship that was docked there at the time. Nearby, a 27 ft m on tsunami destroyed the village of Chenega, killing 23 of the 68 people who lived there. The survivors outran the wave, climbing to high ground. Post-quake tsunamis severely affected Whittier, Seward, Kodiak, and other Alaskan communities, as well as people and property in British Columbia, Washington, Oregon, and California.USC Tsunami Research Group 1964 Alaskan Tsunami http://www.usc.edu/dept/tsunamis/alaska/1964/webpages/ University of Southern California 18 July 2015 dead https://web.archive.org/web/20150508154813/http://www.usc.edu/dept/tsunamis/alaska/1964/webpages/ 8 May 2015 Tsunamis also caused damage in Hawaii and Japan. Evidence of motion directly related to the earthquake was also reported from Florida and Texas. Geology left|thumb|USGS United States Geological Survey ShakeMap of the earthquake.|300x300px On March 27, 1964, at 5:36 p.m. AKST (March 28, at 3:36 a.m. UTC),Time a fault between the Pacific and North American plates ruptured near College Fjord in Prince William Sound. The epicenter of the earthquake was 12.4 mi km on north of Prince William Sound, 78 mi km east of Anchorage and 40 mi km west of Valdez. The focus occurred at a depth of approximately 15.5 mi km on. Ocean floor shifts created large tsunamis (up to 220 ft m in height), which resulted in many of the deaths and much of the property damage.M 9.2 - The 1964 Prince William Sound, Alaska Earthquake: Impact, USGS Earthquake Hazards Program. The earthquake also caused large rockslides, resulting in great property damage. Vertical displacement of up to 38 ft m occurred, affecting an area of 100000 sqmi within Alaska.June 2026 Studies of ground motion have led to a peak ground acceleration estimate of 0.14–0.18 g. The earthquake was assigned a maximum Modified Mercalli intensity of X (Extreme). Shaking was felt across much of Alaska and parts of western Yukon and British Columbia in Canada. The Alaska earthquake was a subduction zone (megathrust) earthquake, caused by an oceanic plate sinking under a continental plate. The fault responsible was the Aleutian Megathrust, a reverse fault caused by a compressional force. This caused much of the uneven ground, the result of shifting to the opposite elevation. Sousounis Peter The Great Alaska earthquake of 1964 and its legacy In Focus blog 2025-02-15 2014-03-27 2018-12-01 https://www.air-worldwide.com/Blog/The-Great-Alaska-Earthquake-of-1964-and-Its-Legacy/ https://web.archive.org/web/20181201011107/https://www.air-worldwide.com/Blog/The-Great-Alaska-Earthquake-of-1964-and-Its-Legacy/ dead AIR Worldwide Uplift occurred across 520,000 km2 from southern Kodiak to Prince William Sound and further east of the sound. The maximum uplift was in Montague Island, where the ground was raised 13–15 m relative to sea level. The uplift also affected Kodiak, Sitkalidak, and Sitkinak islands. Subsidence was observed for 285,000 km2 from north and west of the sound, in Chugach Mountains, most of Kenai Peninsula, and almost all the Kodiak Island group.Stover C. W. Coffman J.L. 10.3133/pp1527 Seismicity of the United States, 1568-1989 (revised) https://pubs.usgs.gov/publication/pp1527 1993 Professional Paper 1527 55–59 The tsunami thumb|Calculated travel time map for the tectonic tsunami produced by the 1964 Prince William Sound earthquake in Alaska. Tsunami Travel Times computed using Tsunami Travel Timeshttp://www.geoware-online.com/tsunami.html Geoware Tsunami Products geoware-online.com 2018-06-21 https://web.archive.org/web/20180628154437/http://geoware-online.com/tsunami.html 2018-06-28 live software v3.1 (P. Wessel). The map does not show the height or strength of the waves, only the calculated travel times. red Red: 1- to 4-hour arrival times #FFD300 Yellow: 5- to 6-hour arrival times green Green: 7- to 14-hour arrival times blue Blue: 15- to 21-hour arrival times. Two types of tsunami were produced by this subduction zone earthquake. There was a tectonic tsunami produced in addition to about 20 smaller and local tsunamis. These smaller tsunamis were produced by submarine and subaerial landslides and were responsible for the majority of the tsunami damage. Tsunami waves were noted in over 20 countries, including Peru, New Zealand, Papua New Guinea, Japan, Mexico, and in the continent of Antarctica. The largest tsunami wave was recorded in Shoup Bay, near Valdez, Alaska, with a height of about 220 ft m on. Death toll, damage, and casualties thumb|The largest landslide in Anchorage occurred along Knik Arm between Point Woronzof and Fish Creek, causing substantial damage to numerous homes in the Turnagain-By-The-Sea subdivision. thumb|The ruin of Portage thumb|upright|A plank driven through a tire by the tsunami in Whittier thumb|The 5-story JCPenney department store in Anchorage in 1964, following the earthquake As a result of the earthquake, 139 people are believed to have died: Fifteen died as a result of the earthquake itself and another 124 died from the subsequent tsunamis in Alaska, Oregon, and California. National Geophysical Data Center World Data Service nd Tsunami event information: Tsunami ID '1954' https://www.ngdc.noaa.gov/hazel/view/hazards/tsunami/event-more-info/1954 NCEI/WDS Global Historical Tsunami Database, 2100 BC to Present National Centers for Environmental Information 2025-02-15 https://web.archive.org/web/20170825022057/https://www.ngdc.noaa.gov/nndc/struts/results?bt_0=1964&st_0=1964&type_7=Like&query_7=prince&d=7&t=101650&s=7 2017-08-25 live 10.7289/V5PN93H7 Five died from the tsunami in Oregon,https://www.oregonlive.com/pacific-northwest-news/index.ssf/2014/03/tsunami_generated_by_good_frid.html Tsunami generated by Good Friday quake devastated Oregon Coast 50 years ago Thursday Tobias Lori The Oregonian 2014-03-24 2018-07-27 https://web.archive.org/web/20180728040212/https://www.oregonlive.com/pacific-northwest-news/index.ssf/2014/03/tsunami_generated_by_good_frid.html 28 July 2018 live and 13 died from the tsunami in California, mostly in or near Crescent City. https://www.sfgate.com/news/article/Crescent-City-tsunami-1964-Alaska-earthquake-12517983.php The day in 1964 when a tsunami ravaged Crescent City Graff Amy San Francisco Chronicle/SFGate 2018-01-23 2020-04-09 https://web.archive.org/web/20191229103214/https://www.sfgate.com/news/article/Crescent-City-tsunami-1964-Alaska-earthquake-12517983.php 29 December 2019 livehttps://activenorcal.com/remembering-the-deadly-75-foot-tidal-wave-that-leveled-crescent-city-in-1964/ Remembering the deadly 75-Foot tidal wave that leveled Crescent City in 1964 Active NorCal 2019-08-20 2020-04-09 Property damage was estimated at $116 million ($US-GDP 116 1964 0 million in US-GDP dollars).US-GDP thumbnail|United States Geological Survey video explaining the earthquake and footage Anchorage area Most damage occurred in Anchorage, 75 mi km on northwest of the epicenter. Anchorage was not hit by tsunamis, but downtown Anchorage was heavily damaged, and parts of the city built on sandy bluffs overlying "Bootlegger Cove clay" near Cook Inlet, most notably the Turnagain neighborhood, suffered landslide damage. The neighborhood lost 75 houses in the landslide, and the destroyed area has since been turned into Earthquake Park. Grass Michael Anchorage: Lessons from Earthquake Park Route Fifty 2025-02-17 2017 http://www.route-fifty.com/cards/geography-disaster-risk-and-resiliency-america-alaska/1/ From series: "The Geography of Disaster Risk and Resiliency in America: Alaska" The Government Hill school suffered from the Government Hill landslide, leaving it in two jagged, broken pieces. Land overlooking the Ship Creek valley near the Alaska Railroad yards also slid, destroying many acres of buildings and city blocks in downtown Anchorage. Most other areas of the city were only moderately damaged.February 2025 The concrete control tower at Anchorage International Airport collapsed, killing the controller on the top floor, as well as trapping two cooks on the first floor, who were later rescued. US Geological Survey Hansen Wallace R. Eckel Edwin B. Schaem William E. Lyle Robert E. George Warren Chance Genie The Alaska Earthquake, March 27, 1964: Field Investigations and Reconstruction Effort Washington, DC Geological Survey Professional Paper 541 1966 https://pubs.usgs.gov/publication/pp541 29 10.3133/pp541 Crown Fountain Henry The Great Quake: How the Biggest Earthquake in North America Changed Our Understanding of the Planet New York 2017 9781101904060120 One house on W. 10th Avenue suffered peripheral damage, but only one block away the recently completed (and still unoccupied) Four Seasons Building on Ninth Avenue collapsed completely, with the concrete elevator shafts sticking up out of the rubble like a seesaw.February 2025 The hamlets of Girdwood and Portage, located 30 and 40 mi southeast of central Anchorage on the Turnagain Arm, were destroyed by subsidence and subsequent tidal action. Girdwood was relocated inland and Portage was abandoned. About 20 mi km of the Seward Highway sank below the high-water mark of Turnagain Arm; the highway and its bridges were raised and rebuilt in 1964–66.February 2025 Elsewhere in Alaska thumb|Kodiak before and after the earthquake thumb|The Valdez townsite was abandoned and relocated following the 1964 earthquake and was used as a pipe yard for the construction of the Trans-Alaska Pipeline System, as shown in this 1974 photo Most coastal towns in the Prince William Sound, Kenai Peninsula, and Kodiak Island areas, especially the major ports of Seward, Whittier and Kodiak were heavily damaged by a combination of seismic activity, subsidence, post-quake tsunamis and/or earthquake-caused fires. Valdez with 32 dead was not totally destroyed, but after three years, the town relocated to higher ground 4 mi in west of its original site. Some Alaska Native villages, including Chenega and Afognak, were destroyed or damaged.January 2010 The earthquake caused the ballistic missile detection radar of Clear Air Force Station to go offline for six minutes,https://www.pacaf.af.mil/News/Commentaries/Display/Article/597963/50-years-since-1964-earthquake-catastrophe-military-integral-to-recovery/ 50 YEARS since 1964 earthquake catastrophe: Military integral to recovery Chris McCann 24 March 2014 12 May 2024 Pacific Air Forces the only unscheduled interruption in its operational history. Near Cordova, the Million Dollar Bridge crossing the Copper River also suffered damage, with Span #4 slipping off its pylon and collapsing. The community of Girdwood was also confined to the southern side of the Seward Highway when water rushed into Turnagain Arm and flooded or destroyed any buildings left standing to the north of the highway. Only the ground immediately along the highway and that on the north side of the road dropped, prompting geologists to speculate that Girdwood may rest upon an ancient cliff face covered by thousands of years of sediment and glacial deposits.January 2010 Canada A 4.5 ft m on wave reached Prince Rupert, British Columbia, just south of the Alaska Panhandle, about three hours after the earthquake. The tsunami then reached Tofino, on the exposed west coast of Vancouver Island, and traveled up a fjord to hit Port Alberni twice, washing away 55 homes and damaging 375 others. The towns of Hot Springs Cove, Zeballos, and Amai also saw damage. https://www.ngdc.noaa.gov/hazel/view/hazards/tsunami/runup-data?tsunamiEventId=1954 "Tsunami ID '1954': Runups - 428 results found" National Geophysical Data Center World Data Service nd NCEI/WDS Global Historical Tsunami Database, 2100 BC to Present National Centers for Environmental Information 2014-01-03 https://web.archive.org/web/20171107113426/https://www.ngdc.noaa.gov/nndc/struts/results?bt_0=1964&st_0=1964&type_5=EXACT&query_5=CANADA&d=166&query=&dataset=101650&s=166&submit_all=Search+Database 2017-11-07 live 10.7289/V5PN93H7 (Some information taken from individual entries in database.) The damage in British Columbia was estimated at CA$10 million ($CA 10000000 1964 -6 in CA Canadian dollars or $US 9250000 1964 -6 in US US dollars).CAUS Elsewhere thumb|A winter scene of a "ghost forest" that was killed and preserved by salt water along with ruined buildings at the site of the former town of Portage, 2011 Ten people were killed by the tsunami in Crescent City, California, and one other man was killed near Requa, California after being swept out to sea while fishing in the Klamath River. 1 Associated Press Tidal wave sweeps Air Force man out to sea San Bernardino County Sun 1964-03-29 https://www.newspapers.com/article/the-san-bernardino-county-sun-air-force/359487/ NOAA National Geophysical Data Center 91–113 Lander James F. Lockridge Patricia A. Kozuch Michael J. Tsunamis Affecting the West Coast of the United States, 1806–1992 1964, March 28, 03:36 GMT Boulder, CO NGDC Key to Geophysical Records Documentation (no. 29) 1993 https://www.dnr.wa.gov/sites/default/files/publications/ger_tsunamis_1964_GreatAlaska_pages-from-noaa-13442.pdf https://repository.library.noaa.gov/view/noaa/13442 Four children were killed while camping with their parents on the Oregon coast at Beverly Beach State Park."A look back at the events that moved and shaped Oregon in the 20th century." Salem, OR: Statesman Journal, December 26, 1999. p.6-7. (Archived at Newspapers.com.) An additional death that is sometimes attributed to the tsunami took place in Bolinas, California; a fisherman wading into a seaside channel at Duxbury Point was swept into the ocean by a strong surge that took place 13 hours after the initial tidal surge. 1, 4 Daily Independent Journal Tidal wave is fatal to fisherman Daily Independent Journal San Rafael, CA 1964-03-30 https://www.newspapers.com/article/daily-independent-journal-tidal-wave-is/165380112/ (article continued) Crescent City was particularly hard-hit, with 30 blocks destroyed, representing half of the city's waterfront business district.Powers Dennis M. The Raging Sea: The Powerful Account of the Worst Tsunami in U.S. History 2005 Citadel Press 9780806526829 The total damage to Crescent City was estimated at $7.4 millionPararas-Carayannis George The Effects of the March 27, 1964 Alaska Tsunami In California The Tsunami Page 2007 http://www.drgeorgepc.com/Tsunami1964Calif.html February 11, 2013 live https://web.archive.org/web/20121127111827/http://www.drgeorgepc.com/Tsunami1964Calif.html November 27, 2012 ($76 million in 2025 dollars). Other coastal towns and harbors in the Pacific Northwest, California, and Hawaii were damaged, often extensively. Damage to harbors and boats occurred as far south as Long Beach, California. http://www.usgs.gov/newsroom/article.asp?ID=106 USGS Release: 40th Anniversary of "Good Friday" Earthquake offers new opportunities for public and building safety partnerships 2004-03-26 2025-02-12 https://web.archive.org/web/20160424094418/http://www.usgs.gov/newsroom/article.asp?ID=106 2016-04-24 dead Effects of the earthquake were even noted as far east as Freeport, Texas, where tide gauges recorded waves similar to seismic surface waves. https://www.ngdc.noaa.gov/hazel/view/hazards/tsunami/runup-more-info/9221 Tsunami ID '1954': Runup Information: Freeport, TX National Geophysical Data Center World Data Service nd NCEI/WDS Global Historical Tsunami Database, 2100 BC to Present National Centers for Environmental Information 2025-02-17 10.7289/V5PN93H7 Seiches were detected in wells in countries around the world, including England, Namibia, and Australia.145 Aftershocks There were hundreds of aftershocks in the first weeks following the main shock. In the first day alone, eleven major aftershocks with a magnitude greater than 6.0 were recorded. Nine more struck over the next three weeks. In all, thousands of aftershocks occurred in the months following the quake, and smaller aftershocks continued to strike the region for more than a year. yes center 400 300 1964 Alaska earthquake.map 59 -150 5 Main shock and aftershocks from 1964-1-1 to 1964-12-31 (map data) Recovery efforts Alaska had never experienced a major disaster in a highly populated area before, and had very limited resources for dealing with the effects of such an event. In Anchorage, at the urging of geologist Lidia Selkregg, the City of Anchorage and the Alaska State Housing Authority appointed a team of 40 scientists, including geologists, soil scientists, and engineers, to assess the damage done by the earthquake to the city.Friedel, Megan K. (2010). Guide to the Anchorage Engineering Geology Evaluation Group papers, 1964. ([Archived from the original at Wayback Machine.) UAA/APU Consortium Library Archives and Special Collections. HMC-0051. The team, called the Engineering and Geological Evaluation Group, was headed by Dr. Ruth A. M. Schmidt, a geology professor at the University of Alaska Anchorage. The team of scientists came into conflict with local developers and downtown business owners who wanted to immediately rebuild; the scientists wanted to identify future dangers to ensure that rebuilt infrastructure would be safe. Ruth Anne Marie Schmidt Alaska Women's Hall Of Fame 2025-02-18 2015 https://alaskawomenshalloffame.org/alumnae/ruth-schmidt/ The team produced a report on May 8, 1964, just a little more than a month after the earthquake.Saucier, Heather (April 2014). "PROWESS Honors Historic Earthquake Survivor". (paywalled) AAPG Explorer. American Association of Petroleum Geologists. Retrieved July 31, 2018. The United States military, which has a large active presence in Alaska, also stepped in to assist within moments of the end of the quake. The U.S. Army rapidly re-established communications with the lower 48 states, deployed troops to assist the citizens of Anchorage, and dispatched a convoy to Valdez.Cloe, John Haile "Helping Hand" Military response to Good Friday earthquake https://web.archive.org/web/20161027054632/http://alaskahistoricalsociety.org/helping-hand-military-response-to-good-friday-earthquake/ 2016-10-27 Alaska Historical Society, 3/4/2014 On the advice of military and civilian leaders, President Lyndon B. Johnson declared all of Alaska a major disaster area the day after the quake. The U.S. Navy and U.S. Coast Guard deployed ships to isolated coastal communities to assist with immediate needs. Bad weather and poor visibility hampered air rescue and observation efforts the day after the quake, but on Sunday the 29th the situation improved and rescue helicopters and observation aircraft were deployed. A military airlift immediately began shipping relief supplies to Alaska, eventually delivering 2570000 lbs of food and other supplies. Broadcast journalist Genie Chance assisted in recovery and relief efforts, staying on the KENI air waves over Anchorage for more than 24 continuous hours as the voice of calm from her temporary post within the Anchorage Public Safety Building. When a quake shook Alaska, a radio reporter led the public through the devastating crisis https://www.smithsonianmag.com/history/when-quake-shook-alaska-radio-reporter-led-public-through-devastating-crisis-180974450/ 2020-12-02 Smithsonian Magazine Mooallem Jon 2020-03-19 She was effectively designated as the public safety officer by the city's police chief. Chance provided breaking news of the catastrophic events that continued to develop following the magnitude 9.2 earthquake, and she served as the voice of the public safety office, coordinating response efforts, connecting available resources to needs around the community, disseminating information about shelters and prepared food rations, passing messages of well-being between loved ones, and helping to reunite families.Barbaro Michael 2020-05-22 Genie Chance and the Great Alaska Earthquake https://www.nytimes.com/2020/05/22/podcasts/the-daily/this-is-chance-alaska-earthquake.html?showTranscript=1 The New York Times https://web.archive.org/web/20200522101113/https://www.nytimes.com/2020/05/22/podcasts/the-daily/this-is-chance-alaska-earthquake.html 2020-05-22 dead Accompanying podcast: Genie Chance and the Great Alaska Earthquake The Daily New York Times 2022-05-22 https://www.pandora.com/podcast/the-daily/genie-chance-and-the-great-alaska-earthquake/PE:3890774 2025-02-15 In the longer term, the U.S. Army Corps of Engineers led the effort to rebuild roads, clear debris, and establish new townsites for communities that had been completely destroyed, at a cost of $110 million.Galvin, John Great Alaskan Earthquake and Tsunami: Alaska, March 1964, Popular Mechanics, July 29, 2007. https://web.archive.org/web/20161027062138/http://www.popularmechanics.com/science/environment/a1967/4219868/ 2016-10-27 The West Coast and Alaska Tsunami Warning Center was formed as a direct response to the disaster. Federal disaster relief funds paid for reconstruction and financially supported the devastated infrastructure of Alaska's government, spending hundreds of millions of dollars that helped keep Alaska financially solvent until the discovery of significant oil deposits at Prudhoe Bay. At the order of the U.S. Defense Department, the Alaska National Guard established the Alaska Division of Emergency Services to respond to any future disasters. See also 1960s Alaska List of earthquakes in Alaska Notes References Citations General The Great Alaska Earthquake Of 1964 National Research Council Committee on the Alaska Earthquake 1971–73 National Academy of Sciences Washington Geology, Seismology and Geodesy, Hydrology, Biology, Oceanography And Coastal Engineering, Engineering, Human Ecology, Summary and Recommendation External links M9.2 Alaska Earthquake and Tsunami of March 27, 1964, US Geological Survey, Earthquake Hazards Program 1964 Great Alaska Earthquake, Alaska Division of Homeland Security & Emergency Management. 1964 M9.2 Great Alaska Earthquake, Alaska Earthquake Center, University of Alaska, Fairbanks. The Great Alaska Earthquake & Tsunami March 27, 1964, Disaster Pages of Dr. George Pararas-Carayannis Though the Earth Be Moved: The Alaskan Earthquake (film), Office of Civil Defense (DOD CD 20-238), 1965. (45 minutes) Event Bibliography for 1964 Alaska earthquake, International Seismological Centre Category:1960s tsunamis Category:1964 earthquakes Category:1964 in Alaska Category:1964 in Canada Category:1964 in Hawaii Category:1960s landslides Category:1964 natural disasters Category:1964 natural disasters in the United States Category:March 1964 in the United States Category:1964 in British Columbia Category:1964 disasters in Canada 1964 Alaska Category:Landslides in the United States 1964 Alaska 1964 Alaska 1964 Alaska 1964 Alaska Category:Articles containing video clips Category:History of Anchorage, Alaska