Indeed, like ripples in a pond, a tsunami travels outward in all directions. Out of great catastrophe arises innovation and a new hope for the future of disaster preparedness. Get a new perspective on earthquakes with this rich collection of multimedia resources. Some of the plates have ocean water above them. Still, the fact that it reached those areas at all is testament to the enormity of the quake. Wide zones of deformation are usually characteristic of plate boundaries because of the interaction between two plates. The 1964 earthquake was the first time people understood that there were places called subduction zones that produce these really enormous earthquakes. The theory of plate tectonics is a relatively new scientific concept. These cracks generally ran at high angles to the faults and could run a few hundred feet and span 6 inches (15 centimeters). Feb. 13, 2013. Hes a research geologist with USGS and its Alaska coordinator of earthquake hazards research. Convergent Plate BoundariesSubduction Zones - National Park Service The seismographs recorded these aftershocks as well. 1964 Alaska Earthquake | PBS LearningMedia . This is known as subduction. This vehicle illustrates the force of the tsunami waves that had struck this truck, which had been 32 feet (9.8 meters) above sea level at the time of the quake. In fact, West notes, four out of every five U.S. quakes occurs in this northernmost state. Youre now subscribed to NightLife updates. The types are ocean-ocean, ocean-continent, and continent-continent. The San Andreas Fault that runs through much of California is an enormous transform plate boundary. 2021 Chignik earthquake - Wikipedia There are three types of tectonic plate boundaries: Another large-scale feature is a hotspot, where a plate rides over a rising plume of hot mantle, creating a line of volcanoes on top of the plate. When two tectonic plates slide past each other, the place where they meet is a transform or lateral fault. Seismically triggered landslides are one of the greatest geologic hazards in Anchorage. Two types of tsunami were produced as a result of this massive quake. Instead, blocks of crust are torn apart in a broad zone of shearing between the two plates. The fissure shown here is about 1.5 inches wide. It was the first global seismic network, West tells Science News for Students. Point Reyes National Seashore, California. Ideas for using videos, articles, and infographics about earthquakes in the classroom. Tectonic plates constantly push against each other. the earthquake and tsunami caused the deaths of over . Indeed, the state averages some 60 each day about 22,000 a year. On March 27, 1964 (UTC) at 5:36 p.m. local time, the largest recorded earthquake in U.S. history struck Alaskas Prince William Sound. View from the playground of the Government Hill School in Anchorage, showing damage from the 1964 earthquake. The plate boundary is a broad zone of deformation with a width of about 60 miles (100 kilometers). Imagine that your left hand is the undeformed Pacific Plate, your right hand the intact North American Plate.
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