what type of plate boundary caused the 1964 alaska earthquake

Produced under a Cooperative Agreement for earth science education between the National Park Service's Geologic Resources Division and the American Geosciences Institute. Point Reyes National Seashore, Golden Gate National Recreation Area, and Pinnacles National Park present landscapes affected by the main line of movement, the San Andreas Fault. What Caused The Most Deaths In The Great Alaska Earthquake Of 1964? Fracking wastes and quakes. Science News for Students. Subduction causes deep ocean trenches to form, such as the one along the west coast of South America. The video features USGS geologist George Plafker who, in the 1960s, correctly interpreted the quake as a subduction zone event. When a continental plate meets an oceanic plate, the thinner, denser, and more flexible oceanic plate sinks beneath the thicker, more rigid continental plate. This happens because the oceanic plate is denser (heavier) than the continental plate. Tsunami waves can hit with the devastating force of a powerful tornado. Both plates are capped by oceanic crust. California Academy of Sciences. Aug. 16, 2013. The 1964 Great Alaska Quake caused several downtown areas of Anchorage to collapse. 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. People who work in this field are known as seismologists. Photo by Robert J. Lillie. The U.S. Army Corps of Engineers spent about $110 million dollars repairing infrastructure, rebuilding communities, and clearing debris. On This Day: Great Alaska Earthquake and Tsunami Ideas for using videos, articles, and infographics about earthquakes in the classroom. Southeast of Florida, the Caribbean Plate is sliding east-northeast about 0.8 inches (2 centimeters) per year relative to the North American Plate. The new magma (molten rock) rises and may erupt violently to form volcanoes, often building arcs of islands along the convergent boundary. Active volcanoes of the Lesser Antilles Island Arc form as the North American Plate subducts beneath the Caribbean Plate. Together, these destructive waves swept Alaskas coastline with devastating speed and power. Alaskas continental shelf and North American plate rose over 9 meters during the earthquake. Quakes cause faraway sloshing. Science News for Students. U.S. Geological Survey Professional Paper 1527, Tsunami waves triggered by underwater landslides struck the shorelines with tremendous force. Transform boundaries occur on the north and south sides of the Caribbean Plate. . Perhaps nowhere on Earth is such a landscape more dramatically displayed than along the San Andreas Fault in western California. National Park Service sites in the San Francisco Bay Area reveal a sheared-up, ancient subduction zone landscape developed along the San Andreas Fault. From Montague Island, the faults and related belt of maximum uplift may extend southwestward on the Continental Shelf to the vicinity of the Kodiak group of islands. Seismically triggered landslides are one of the greatest geologic hazards in Anchorage. S. Perkins. At 5:36 p.m., the ground began shaking violently. Photo by Robert J. Lillie. Coastal forests plunged below sea level and were destroyed by salt water. USGS circular published one month after the earthquake by Arthur Grantz, George Plafker, and Reuben Kachadoorian detailing their scientific investigations of the quake.

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