At this boundary, the Pacific Plate slides beneath the North American Plate, causing the majority of Alaska’s earthquakes, including the 1964 earthquake. plates 1.docx - A Name of the orange marker 1964 Alaska Earthquake 1 The marker represents events on a plate boundary List the plates that make up the, 1. Include information from. Course Hero is not sponsored or endorsed by any college or university. strongest earthquakes in Southern Alaska are generated by the megathrust fault that marks the contact zone between the subducting Pacific and overriding North American plates. Most of the people were home and schools were closed for the day. The M 9.2 earthquake ruptured a patch of the subduction zone that was ~500 miles long and 100–175 miles wide, producing vertical displacements over an area of about 110,039 square miles in south-central Alaska (Plafker, 1969). Figure 1. Check out Myrna Martin's award winning textbooks, e-books, videos and rock sets. State which plate tectonic interaction is. A crevasse ripped apart an elementary school that was closed for the day. State at least two geological events that are happening at the, location (examples are formation of volcanoes and earthquakes)? There were two types of waves generated during the earthquake. This photo shows a landslide that was caused by the earthquake near Anchorage, Alaska. Damage in downtown Anchorage, USGS Two types of wavesNinety percent of the people that died in the 1964 Alaska earthquake were killed by tsunamis. The distance from the Prince William Sound to Anchorage is 101 miles. On March 27th, 1964 the afternoon of Good Friday, the strongest earthquake recorded in North America hit Anchorage, Alaska and became known as the great Alaskan earthquake/the Good Friday earthquake. It killed people in Hawaii when the waves came ashore. It was the largest earthquake ever recorded in North America. Alaskan Earthquake Video (1966) Excerpt from the TV show "The Big Picture" produced by the US Army in 1966 about the Alaska Earthquake and its tragic effects. The epicenter was six miles (10 kilometers) east of College Fiord in the Prince William Sound. Off the coast of Alaska lies the Aleutian Subduction Zone –a 2,500 mile long convergent plate boundary where the Pacific Plate subducts under the North American Plate at a rate of 6–7 cm/yr. The Alaskan Earthquake 1964 An examination of the 1964 Alaska Good Friday Earthquake from a (pre- plate tectonics theory) geological point of view. That’s where one tectonic plate sinks beneath another. The 1964 earthquake in Anchorage, Alaska occurred as a result of an oceanic plate sinking under a continental or land plate. List the plates that make up the, 2. Epicenter, Focus, and Magnitude. The Alaska- Aleutian subduction zone, at the plate boundary, is responsible for most of the earthquake activity in south-central Alaska—including the 1964 Earthquake. In comparing these two events we can get an overview of what happened and better prepare ourselves for something like that in the future. The 1964 great Alaska earthquake was the second largest earthquake recorded instrumentally, with moment magnitude, M w =9.2 (Kanamori, 1977).Surface displacements in the epicentral region suggest that beneath Prince William Sound the Pacific plate–North America interface slipped by 15–20 m or more during this event (Holdahl and Sauber, 1994, Oleskovich et al., 1999). Pacific Plate subducting beneath the North American PlateThe area where the earthquake occurred is a subduction zone where the Pacific Plate is subducting beneath the North American Plate. Alaska’s largest earthquakes, exceeding magnitude 8 and even 9, occur primarily in the shallow part of the subduction zone, where the crust of the Pacific Plate sticks and slips past the overlying crust. The wave in the inlet that reached a height of 200 feet (67 meters). List the plates that make up the boundary: pacific plate and oceanic plate 2. The land around the town of Portage subsided approximately 3 meters (9 feet). Name of the orange marker: 1964 Alaska Earthquake 1. (Image credit: USGS) The Great Alaska earthquake struck at 5:36 p.m. Alaska Standard Time on March 27, 1964. The 1964 M9.2 Great Alaska Earthquake, which is still the second largest earthquake ever recorded worldwide, began under Prince Most of the people were home and schools were closed for the day. Look at the arrows on the map. occurring at this plate boundary (slip, collision, spreading, or subduction): 3. As … The 1964 earthquake in Anchorage, Alaska occurred as a result of an oceanic plate sinking under a continental or land plate. 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 (1,300,000 square km). Ocean wide wavesThe main tsunami that swept across the Pacific Ocean. Thanks to the technology and inquiring minds we are able to study past events like the 1906 San Francisco earthquake and the 1964 Alaska earthquake. The Earthquake and Its Effects The 1964 Alaska earthquake resulted from rupture along the thrust fault boundary bet-ween the downgoing Pacifi c Plate and the overriding North American Plate, causing widespread shaking and tectonic defor-mation. The Mercalli intensity scale is a seismic intensity scale used for measuring the intensity of an earthquake. The Great Alaskan Earthquake of 1964 happened on Good Friday, March 27th, at 5:36 p.m. Atlantic Daylight Time. This animation discusses the range of tectonic activity from megathrust earthquakes to accretion of geologic terranes. The March 27, 1964, earthquake was accomp anied by crustal deformation-including warping, horizontal distortion, and faulting-over probably more than 110,000 square miles of land and sea bottom in … 1.2 Tectonics of the great 1964 Alaska earthquake. © 2011-2020 Call of Fire Science Company  All rights reserved. Most people were home and schools were closedThe great 1964 Alaska Earthquake occurred on Good Friday, March 27, 2964 in the late afternoon. Produced by Creative Arts Studio in 1964 for the USGS. Liquefaction in and around Anchorage tore the land apart. The Anchorage International Airport tower collapsed during the earthquake. The 9.2 magnitude earthquake had a depth of 25 kilometers, lasted 4 minutes and 38 seconds and killed nearly 131 people. State which plate tectonic interaction is occurring at this plate boundary (slip, collision, spreading, or subduction): Subductio n divergent 3. . The crust of southern Alaska was compressed and warped due to plate movement prior to the great earthquake after the plates locked together. Click here to browse.Â. 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, It was the largest earthquake ever recorded in North America. Subduction zone earthquakes follow the descent of the Pacific plate down to 200 km or more. 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. Northern Virginia Community College • ENV 121, Environmental Geology Notes on Metamorphic Rock, deep_earth_structure_global_tectonics_d_mueller.pdf, 1. Alaska is part of the seismically active 'Pacific Ring of Fire'. Only 9 people died from the earthquake, but 130 died from the subsequent tsunami; 10 as far away as Crescent City, CA. The great 1964 Alaska Earthquake occurred on Good Friday, March 27, 2964 in the late afternoon. The marker represents events on a plate boundary. Alaska earthquake of 1964, earthquake that occurred in south-central Alaska on March 27, 1964, with a moment magnitude of 9.2. Scroll down to read more. Tsunami damage in SewardIn Seward, a section of the waterfront slid into Resurrection Bay causing an oil fire as it was floating offshore. Two types of tsunami were produced as a result of this massive quake. See more » Mercalli intensity scale. Scroll down to read Across south-central Alaska, ground fissures, collapsing structures, and tsunamis resulting from the earthquake caused about 131 deaths. The US state was hit by a 9.2-magnitude earthquake in March 1964, the strongest ever recorded in North America. A. Two types of tsunami were produced as a result of this massive quake. The main but not initial megathrust in the eastern part of the great 1964 Alaska M 9.2+ earthquake was actually the yak thrusting west-southwest onto the Pacific plate (Reeder, 2016; Stauder and Bollinger, 1966; Wyss and Brune, 1967). Check out Myrna Martin's award winning textbooks, e-books, videos and rock sets. On Good Friday, March 28, 1964, south-central Alaska was struck by the second-largest earthquake ever recorded. The March 27, 1964, earthquake was accomp anied by crustal deformation-including warping, horizontal distortion, and faulting-over probably more than 110,000 square miles of land and sea bottom in south-central Alaska. The Pacific Plate containing the Pacific Ocean is being pushed under the North American Plate. Alaska is part of the seismically active Pacific Ring of Fire. This preview shows page 1 - 2 out of 3 pages. The Kids Fun Science Bookstore covers a wide range of earth science topics. At magnitude 9.2, it was the second largest quake ever recorded by seismometers. Strong, destructive earthquakes can accompany a rapid, several-meter uplift of bedrock along subduction zones. The easternmost megathrust earthquake was the March 28, 1964 M9.2 Prince William Sound earthquake, currently the second largest recorded earthquake in the world. The marker represents events on a plate boundary. D) plate boundaries move at regular rates so the interactions across plate boundaries are predictable and regular B) stress continues to build up all the time and when it is great enough to overcome friction there will be an earthquake and then the process will start over again The boundary of aftershocks from the 1964 earthquake by Furumoto [1965] is shown by the thick line. This earthquake occurred after the world’s largest earthquake occurred in Chile within 1960. 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