![]() Tsunamis Generated by Megathrust EarthquakesĪn 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.Animations explain the magnitude (Just how big is 9.2?), rupture processes, elastic rebound, and resulting tsunami. ![]() Butler explaining the science behind the earthquake. The 1964 Alaska Earthquake-What Happened and Why.“The 1964 Alaska Earthquake and Tsunami” lecture by George Plafker, USGS Geologist Emeritus. This was a great leap forward in resolving key mechanisms of the developing theory of plate tectonics.Īn expanded version (11 min) is also available: 1964 Quake: The Alaska Earthquake The video features USGS geologist George Plafker who, in the 1960’s, correctly interpreted the quake as a subduction zone event. history had profound and lasting impacts on our lives. Short video (4 min) by Stephen Wessells, USGS relating how the largest quake in U.S. Magnitude 9.2: The 1964 Alaska Earthquake.Summary of the earthquake’s cause and effects from the Alaska Earthquake Information Center. 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. 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. The 1964 Alaska Earthquake and Tsunamis-A Modern Perspective and Enduring Legacies.United States Government Printing Office, Washington: 1993. Geological Survey Professional Paper 1527, Seismicity of the United States, 1568-1989 (Revised), Learn about the great leaps in research over the past 50 years. earthquake ever recorded, and a turning point in earth science. Science Features: The 1964 Alaska Earthquake & Tsunami.The map shows the epicenter of the 1964 Alaska Earthquake (red star), caused when the Pacific Plate lurched northward underneath the North American Plate. It is also the second largest earthquake ever recorded, next to the M9.5 earthquake in Chile in 1960. The earthquake lasted approximately 4.5 minutes and is the most powerful recorded earthquake in U.S. 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. On Maat 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. Map of southern Alaska showing the epicenter of the 1964 Alaska Earthquake (red star).
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