commemorates the Alaska Earthquake and examines the advances in knowledge and technology that have helped improve earthquake preparation and response in Alaska and around the world. [slideshow]As the sunlight waned on March 27, 1964, Alaska… Look back at the 9.2-magnitude earthquake, the largest ever recorded in North America, which shook Alaska 50 years ago. The epicenter was about 10 km east of the mouth of College Fiord, approximately 90 km west of Valdez and 120 km east of Anchorage. It was the largest earthquake ever recorded in North America. The 1964 Alaskan earthquake, also known as the Great Alaskan earthquake and Good Friday earthquake, happened at 5:36 PM AKST on Good Friday, March 27, 1964. The earthquake struck at 5:36 p.m. Alaska Standard Time on Good Friday. Major structural damage occurred in many of the major cities in Alaska. The Great Alaska earthquake struck at 5:36 p.m. Alaska Standard Time on March 27, 1964. An examination of the 1964 Alaska Good Friday Earthquake from a (pre- plate tectonics theory) geological point of view. States as far away as Texas and Florida were affected with vertical motions of up to 5 to 10 cm. (en Español). Includes extensive archival footage of the earthquake and aftermath. after a M9.5 earthquake in Chile in 1960. The shaking lasted for more than four minutes, launching several deadly tsunamis and triggering killer landslides. I felt the house shake and my Mom screamed earthquake. Red lines are mapped faults. Thousands of aftershocks were recorded in the months following the mainshock. It was the second-largest earthquake ever recorded, second only to Chile in 1960, which experienced a quake of 9.5 Moment Magnitude (Mw). USGS published the results of investigations of the Alaska earthquake of March 27, 1964 in a series of six Professional Papers. This opinion piece by USGS geologist Peter Haeussler, et al. On March 27, 1964, a megathrust earthquake struck Alaska, about 15 miles below Prince William Sound , halfway between Anchorage and Valdez. April 30–May 2, 2014 in Anchorage, Alaska. United States Government Printing Office, Washington: 1993. The area in which it was felt was about 1,300,000 square kilometers (all of Alaska, parts of Canada, and south to Washington). The Alaska Earthquake Alliance coordinates earthquake awareness and preparedness activities throughout Alaska. When was Alaska's last earthquake? 61.04N, Lon. IRIS video directed by Robert F. Butler explaining the science behind the earthquake. A documentary chronicling the first 72 hours after the 1964 Alaska Earthquake and the response to the disaster by the United States Office of Civil Defense, U.S. Military, and local, state, and federal officials. Four out of five earthquakes in the United States occur in Alaska. This earthquake is the second largest earthquake ever recorded in the world. The devastating 9.2 magnitude earthquake and subsequent tsunamis ravaged coastal communities and took over 139 lives. above is Fourth Avenue in Anchorage, Alaska right after the big earthquake of March 27, 1964. Seismicity of the United States, 1568-1989 (Revised), In addition to the earthquake, the event triggered a major tsunami that caused casualties and damage from the Kodiak Islands to northern California. In the first day there were 11 aftershocks with magnitudes greater than 6.0; in the next three weeks there were 9 more. Available at: [Accessed 21 April 2015]. On March 27, 1964 at 5:36pm local time (March 28 at 3:36 UTC) an earthquake of magnitude 9.2 occurred in the Prince William Sound region of Alaska. This tsunami was generated by the 9.2 magnitude earthquake under Prince William Sound, Alaska on March 27, 1964. The 1964 Alaska tsunami was the second largest ever recorded, again following only the one caused by the 1960 Chile earthquake (4 meters at Sitka). On the morning of March 28, 1964 (UTC), without warning, the largest recorded earthquake in U.S. history struck Alaska’s Prince William Sound. by Carl W. Stover and Jerry L. Coffman, Oscillations in the height of water in wells were reported from as far away as South Africa. The earthquake rupture started approximately 25 km beneath the surface, with its epicenter about 6 miles (10 km) east of the mouth of College Fiord, 56 miles (90 km) west of Valdez and 75 miles (120 km) east of Anchorage. Oral presentations, poster sessions, exhibits, field trips, business meetings and social gatherings all provide participants the opportunity to meet and share with their peers. The earthquake rupture started approximately 25 km beneath the surface The shaking lasted for more than four minutes, launching several deadly tsunamis and triggering … Ned Rozell’s personal account of his meeting with George Plafker, one of three USGS Geologists who responded to the Alaska quake a few days after event. It caused about 139 deaths. Landslide and slumping effects in the Turnagain Heights area, Anchorage, Alaska, caused by the March 28, 1964, earthquake. Alaska 1964 Earthquake Pictures These Alaska 1964 Earthquake Pictures bring you rare photos from survivors that tell the incredible story of the destruction in Anchorage, caused by the 9.2 quake that lasted 5 minutes. The area where there was significant damage covered about 130,000 square kilometers. 2011 Tōhoku earthquake and tsunami. Sixteen people died from resulting tsunamis in Oregon and California. The 1964 Alaska earthquake was a "subduction zone earthquake" (or "megathrust earthquake"), caused by an oceanic plate sinking under a continental plate. 147.73W, at a depth of approximately 25 km. Description. Special Earthquakes, Earthquake Sequences, and Fault Zones, Real-time Notifications, Feeds & Web Services. Through very complete mapping of vertical deformation and faulting and the application of tectonics, he was first to propose in 1965 that the source of the 1964 Alaska earthquake was a low-angle thrust fault. U.S. Geological Survey Professional Paper 1527, 1964: Alaska's Good Friday Earthquake. AKST (3:36a.m.UTC), a fault between the pacific Ring of Fire and the North American Plate ruptured nearCollege Fjord in the Prince William Sound. The video features USGS geologist George Plafker who, in the 1960’s, correctly interpreted the quake as a subduction zone event. On March 27, 1964 at 5:36pm local time (March 28 at 3:36 UTC) an earthquake of magnitude 9.2 occurred in the Prince William Sound region of Alaska. Fifty years later, it continues to shape Alaska, its people, and the science of earthquakes. On March 27th, 1964, the second largest instrumentally recorded earthquake worldwide rocked southern Alaska for 4 to 5 minutes. The number of deaths from the earthquake totalled 131; 115 in Alaska and 16 in Oregon and California. 1964 Alaska Earthquake 1964 Alaska Earthquake March 27, 1964 - M 9.2 - The 2nd largest earthquake ever recorded. However, Dickerson’s safe passage through the ordeal is … The epicenter was about 10 km east of the mouth of College Fiord, approximately 90 km west of Valdez and 120 km east of Anchorage. March 27, 1964 (5:46PM Alaska Daylight Time) marks the 50th anniversary of the 1964 Great Alaska earthquake. Local waves claimed at least 82 lives. An animation about tsunami-generating megathrust earthquakes using examples from Japan (2011), Chile (2010), and Alaska (1964) to describe structures that generate deadly tsunamis including: megathrust plate-boundary displacement, deformation of the overriding plate by splay faulting and/or folding, and earthquake-generated landslides. Wikipedia. It released at least twice as much energy as the San Francisco earthquake of 1906 and was felt on land over an area of almost 502,000 square miles … The Great Alaska earthquake struck at 5:36 p.m. Alaska Standard Time on March 27, 1964. On March 27, 1964, at 5:36 p.m. (03:36 3/28 UTC), a great earthquake of magnitude 9.2 (moment magnitude) occurred in the Prince William Sound region of Alaska. The tsunami killed 124 people, all in North America, most in Alaska. The map shows the epicenter of the 1964 Alaska Earthquake (red star), caused when the Pacific Plate lurched northward underneath the North American Plate. Caption for map: This map shows location of the 1964 earthquake: star - epicenter, open circles - aftershocks occurred within 1 month after the mainshock, solid black line - estimated extent of the ruptured fault from the seismic waveform inversion (Christensen and Beck, PAGEOPH, 1994). Earthquake history, photos, videos, and more from the Alaska Division of Homeland Security & Emergency Management. This “Story map” combines an interactive map with historic photos of the earthquake. The Alaska earthquake of March 27, 1964, magnitude approximately 8.3–8.4, began at 6:36 p.m. Its epicenter was in the northern part of the Prince William Sound area; focal depth was 20–50 km. For more than 4 minutes, the earth buckled and lurched all across southern Alaska. Summary of the earthquake’s cause and effects from the Alaska Earthquake Information Center. The 1964 Alaska tsunami was the second largest ever recorded, again following only the one caused by the 1960 Chile earthquake (4 meters at Sitka). An expanded version (11 min) is also available: 1964 Quake: The Alaska Earthquake The death toll was extrememly small for a quake of this magnitude due to low population density, the time of day and the fact that it was a holiday, and the type of material used to construct many buildings (wood). On March 27th, 1964, the second largest instrumentally recorded earthquake worldwide rocked southern Alaska for 4 to 5 minutes. In the first day eleven aftershocks were recorded with magnitudes greater than 6.0. The pic. A bigger network was installed after the quake.) It was the largest U.S. earthquake ever recorded, and a turning point in earth science. The 1964 Alaska earthquake is reported to have caused approximately 128-131 deaths. These maps, by Randall W. Jibson and John A. Michael, depict seismic landslide hazards in Anchorage and are an important tool for planning, zoning, and emergency-response preparation. The Tenth U.S. National Conference on Earthquake Engineering will provide an opportunity for researchers and practitioners to share the latest knowledge and techniques to mitigate the damaging effects of earthquakes and tsunamis. The damage totalled 300-400 million dollars (1964 dollars). Of the 119 deaths attributable to the effects of the ocean, about one-third were due to the open-ocean tsunami: 4 at Newport Beach, Oregon; 12 at Crescent City, California; and about 21 in Alaska. IRIS webpage dedicated to George Plafker, a USGS field geologist noted for his studies of subduction-zone and backarc thrust earthquakes. The 1964 Alaska Earthquakealso known as theGreat Alaskan earthquakeandGood Friday earthquake is the second strongest Earthquake in World History and the strongest Earthquake ever recorded in North American History.On March 27, 1964, at 5:36p.m. This is the second largest earthquake ever recorded and the largest ever recorded in North America. An animation that describes earthquakes along the Aleutian subduction zone, one of the most seismically active in the world, and the Queen Charlotte Transform Fault. Plafker spent most of the summer in Alaska researching and documenting the earthquake. The 1964 Anchorage earthquake – I was 11, my Dad was stationed at Elmendorf. On the morning of March 28, 1964 (UTC), without warning, the largest recorded earthquake in U.S. history struck Alaska’s Prince William Sound. Abridged from Three weeks after the main shock more than 1000 microaftershocks per day were recorded on a high-gain, high-frequency seismograph operating at a gain of more than 10 6 at 10 cps. Map showing ground motion and shaking intensity based on instrumental measurements of shaking along with information about local geology and the earthquake’s location and magnitude. The duration of rupture lasted approximately 4 minutes (240 seconds). Seismically triggered landslides are one of the greatest geologic hazards in Anchorage. Here the pavement sank 11 feet in response to … Animations explain the magnitude (Just how big is 9.2? It was the second-largest earthquake ever recorded, second only to Chile in 1960, which experienced a quake of 9.5 Moment Magnitude (Mw). The epicenter of this awesome quake was a mere 45 miles west of Valdez and 14 miles under the earth's crust. The earthquake lasted approximately 4.5 minutes and is the most powerful recorded earthquake in U.S. history. ), rupture processes, elastic rebound, and resulting tsunami. Learn about the great leaps in research over the past 50 years. “The 1964 Alaska Earthquake and Tsunami” lecture by George Plafker, USGS Geologist Emeritus. The mainshock and its aftershocks occurred on a fault which is part of the boundary between the Pacific and North American plates. >>>Hey, I like these rare pictures<<< then let us know Satellite map of 1964 Alaska earthquake The 1964 Alaskan earthquake , also known as the Great Alaskan earthquake and Good Friday earthquake , occurred at 5:36 P.M. A field program to record microaftershocks was undertaken following the great Alaska earthquake of 28 March 1964. SSA’s 2014 Annual Meeting will provide a stimulating exchange of research on a wide range of topics with colleagues from all over the world. 2156 Koyukuk Drive, PO Box 757320, Fairbanks, AK 99775. Strong ground motion at Seward lasted 3–4 minutes. The four minute duration of shaking triggered many landslides and avalanches. Of the 119 deaths attributable to the effects of the ocean, about one-third were due to the open-ocean tsunami: 4 at Newport Beach, Oregon; 12 at Crescent City, California; and about 21 in Alaska. This was a great leap forward in resolving key mechanisms of the developing theory of plate tectonics. The aftershock zone of this earthquake was about 250 km wide and extended about 800 km from Prince William Sound to the southwestern end of Kodiak Island. Much of the damage and most of the lives lost were due to the effects of water waves. This year marks the 50th anniversary of the 1964 Great Alaska Earthquake, an event that transformed how geologists view the Earth. These films were shot by amateur and professional cameramen in the hours and days following the earthquake at locations such as Anchorage, Kodiak, Seward, Valdez, Chenega, Afognak. Produced by Creative Arts Studio in 1964 for the USGS. 1964 (MCMLXIV) was a leap year starting on Wednesday of the Gregorian calendar, the 1964th year of the Common Era (CE) and Anno Domini (AD) designations, the 964th year of the 2nd millennium, the 64th year of the 20th century, and the 5th year of the 1960s decade. Seiches, a sort of sloshing of water back and forth in a small body of water like a boat harbor or swimming pool, were observed as far away as Louisiana where a number of fishing boats were sunk. The 1964 Great Alaska Earthquake and Tsunami. The earthquake also transformed geology, because it revealed that oceanic plates are shoved under continents. Read personal accounts of the earthquake and submit your own story. The waterfront at Seward a few months after the earthquake, looking north. briefly recounts the events of March 27, 1964 and explains the scientific and societal importance of the earthquake. It was about 8:30 pm, on Good Friday, March 27, 1964. The Great Alaska earthquake struck at 5:36 p.m. Alaska Standard Time on March 27, 1964. On March 27, 1964, at 5:36 p.m. (03:36 3/28 UTC), a great earthquake of magnitude 9.2 (moment magnitude) occurred in the Prince William Sound region of Alaska. The Alaskan earthquake occurred on Good Friday, March 27, 1964, at 5:36 PM local time. Across south-central Alaska (mainly in Anchorage), ground fissures, collapsing structures, and tsunamis were caused by the earthquake. Anchorage, Alaska. Short video (4 min) by Stephen Wessells, USGS relating how the largest quake in U.S. history had profound and lasting impacts on our lives. Uplifted sea floor at Cape Cleare on Montague Island in Prince William Sound in the area of the … 9 of 47 10 of 47 Alaska Earthquake March 27, 1964. Explains how Yakutat terrane accretion drives mountain building and crustal fault earthquakes like the 2002 M7.9 Denali Earthquake. The Alaska Earthquake of March 27, 1964; field investigations and reconstruction effort. In 50 years, no earthquake since has matched the power of the March 27, 1964, Great Alaska earthquake. 1964 Good Friday Earthquake. The 1964 earthquake was a defining moment in a territory that had just achieved statehood. Release Date: February 24, 2014. On Good Friday, March 27, 1964, the largest earthquake ever to hit North America struck Alaska. Three hours earlier, just before sundown, the most powerful earthquake ever measured in North America struck Alaska… A tragedy through and through, the 1964 earthquake is a defining point in Alaska and Anchorage history. These were mainly of two kinds: the tsunami of open-ocean sea wave, generated by large-scale motion of the sea floor; and the local wave, generated by underwater landslides in bays of fiords. At 5:36 p.m. March 27, 1964, the largest earthquake ever recorded in North America, a 9.2-magnitude on the Richter scale, shook south-central Alaska, sending buildings toppling in Anchorage. The devastating 9.2 magnitude earthquake and subsequent tsunamis ravaged coastal communities and took over 139 lives. The shaking lasted for more than four minutes, launching several deadly tsunamis and … n addition to damage in the epicentral region immediately following the quake, long period seismic waves traveled around the earth for several weeks. Latitude: 61° 02' 60.00" N UAF is an AA/EO employer and educational institution and prohibits illegal discrimination against any individual. Excerpt from the TV show “The Big Picture” produced by the US Army in 1966 about the Alaska Earthquake and its tragic effects. (Before March 1964, Alaska had only two of the earthquake-sensing instruments — one in Fairbanks and one in Sitka. Important coastal ports, roads and rail lines were destroyed. On Good Friday, March 27, 1964, the largest earthquake ever to hit North America struck Alaska. This 1964 earthquake footage from Valdez, Alaska, shows Valdez Harbor emptying of water and the tsunami rushing back in. This is the largest recorded earthquake (moment magnitude of ~9.2) to have occurred in North America and the second largest earthquake to have been recorded in the world. This USGS Fact Sheet by Thomas M. Brocher, et al. U.S. Geological Survey Professional Paper , [online] 541(111). Basically the whole earth vibrated (rang) like a church bell during this time. Smaller aftershocks continued for more than a year. After the 1964 megathrust earthquake, three-quarters of the Aleutian subduction zone ruptured in … 1964 Alaska earthquake. At 5:36 pm on Friday, March 27, 1964 (28 March, 03:36Z UTC) the largest earthquake ever measured in North America, and the second-largest recorded anywhere, struck 40 miles west of Valdez, Alaska in Prince William Sound with a moment magnitude we now know to be 9.2. Maximum height reported for these waves were 70 meters in Valdez Arm. It is also the second largest earthquake ever recorded, next to the M9.5 earthquake in Chile in 1960. Over 10,000 aftershocks were recorded following the main earthquake. Now ranked a magnitude 9.2, the second-largest ever recorded, the earthquake radically transformed the young state. USGS circular published one month after the earthquake by Arthur Grantz, George Plafker, and Reuben Kachadoorian detailing their scientific investigations of the quake. Close-up of Government Hill elementary school, which was destroyed by the Government Hill landslide. The quake had a moment magnitude of 9.2, making it the second most powerful earthquake ever recorded. Alaska earthquake of 1964, earthquake that occurred in south-central Alaska on March 27, 1964, with a moment magnitude of 9.2. 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. In 50 years, no earthquake since has matched the power of the March 27, 1964, Great Alaska earthquake. 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