Many houses, buildings and infrastructures were damaged or destroyed. It was the largest earthquake ever recorded in North America. During the earthquake, an 8 0 0 k- i lo m e te r by 2 5 0 k- i lo m e te r a r e a (s e e The Great Alaskan Earthquake of 1964 happened on Good Friday, March 27th, at 5:36 p.m. Atlantic Daylight Time. The epicenter of the earthquake was 6 miles east of the mouth of College Fiord, approximately 55 miles west of Valdez and 74 miles east of Anchorage. As … Include information from. Across south-central Alaska, ground fissures, collapsing structures, and tsunamis resulting from the earthquake caused about 131 deaths. It killed people in Hawaii when the waves came ashore. 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. 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 epicenter was six miles (10 kilometers) east of College Fiord in the Prince William Sound. Damage in downtown Anchorage, USGS Most of the people were home and schools were closed for the day. The late afternoon quake spared many lives because schools were closed and few people were shopping on Good Friday. The 1964 earthquake in Anchorage, Alaska occurred as a result of an oceanic plate sinking under a continental or land plate. 1.2 Tectonics of the great 1964 Alaska earthquake. (Image credit: USGS) The Great Alaska earthquake struck at 5:36 p.m. Alaska Standard Time on March 27, 1964. The 9.2 magnitude earthquake had a depth of 25 kilometers, lasted 4 minutes and 38 seconds and killed nearly 131 people. Two types of tsunami were produced as a result of this massive quake. At magnitude 9.2, it was the second largest quake ever recorded by seismometers. The 1964 Great Alaska Earthquake occurred on Good Friday, March 27th. The 1964 earthquake was caused by the same processes that cause the majority of earthquakes in that area. Click here to browse.Â. New!! spared many lives because schools were closed and few people were shopping on Good Friday. Strong, destructive earthquakes can accompany a rapid, several-meter uplift of bedrock along subduction zones. Award Winning Earth Science Materials at our Bookstore. The 1964 earthquake in Anchorage, Alaska occurred as a result of an oceanic plate sinking under a continental or land plate. Local tsunamisLocal tsunamis were generated by landslides crashing into bays and fjords. State which plate tectonic interaction is occurring at this plate boundary (slip, collision, spreading, or subduction): Subductio n divergent 3. . Parts of Montague Island were uplifted  4-9 meters (12 to 36  feet). Produced by Creative Arts Studio in 1964 for the USGS. This earthquake occured at the convergent boundary between the Pacific Plate and the North American Plate. At this boundary, the Pacific Plate slides beneath the North American Plate, causing the majority of Alaska’s earthquakes, including the 1964 earthquake. A large landslide triggered a tsunami in Shoup Bay near Valdez. 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. Look at the arrows on the map. Earth scientists now recognize that the 1964 Great Alaska Earthquake resulted from plate convergence: where the Pacific megathrust fault during the 1964 earthquake Plate is being overridden by the North American Plate, it descends, or subducts, into the Earth’s mantle along the Aleutian Trench. The land around the town of Portage subsided approximately 3 meters (9 feet). This kind of subduction causes the largest and deepest earthquakes known. Geology and the Environment (1)-merged.pdf, Coastline Community College • GEOLOGY 105. It was the largest earthquake ever recorded in North America. Alaska earthquake of 1964, earthquake that occurred in south-central Alaska on March 27, 1964, with a moment magnitude of 9.2. Course Hero is not sponsored or endorsed by any college or university. Liquefaction in and around Anchorage tore the land apart. The megathrust boundary between the plates results in both the 4,000-km-long Aleutian Trench and in the arc of active volcanoes that lie subparallel to the trench. The marker represents events on a plate boundary. The area is now Earthquake Park. 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 earthquake rupture started approximately 25 km beneath the surface, with its epicenter about 6 miles (10 km) east of the mouth of College Fiord, 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. Alaska’s continental shelf and North American plate rose over 9 meters during the earthquake. See more » Mercalli intensity scale. State at least two geological events that are happening at the, location (examples are formation of volcanoes and earthquakes)? Crustal plate movementThe Pacific Plate moved underneath the North American Plate an average of 27 feet (9 meters) during the earthquake. Look at the arrows on the map. A crevasse ripped apart an elementary school that was closed for the day. Turnagain Heights landslideA huge landslide in downtown anchorage caused the main business district to drop down nine feet (3 meters). 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). 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. Most people were home and schools were closedThe great 1964 Alaska Earthquake occurred on Good Friday, March 27, 2964 in the late afternoon. The event had a rupture length of roughly 700 km extending from Prince William Sound in the northeast to the … State which plate tectonic interaction is. 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 U.S. Geological Survey reports that: The earthquake caused rivers, lakes, and other waterways to slosh as far away as the coasts of Texas and Louisiana. 1964 Alaska earthquake is mega thrust earthquake that occurred in the subduction zone that Pacific plate was subducting beneath the North American plate or along the Aleutian fault with length of 3400 kilometers. 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). 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