The following table lists the largest earthquakes in the United States on record, according to rank, magnitude, date, and location. We reported over 220,000 earthquakes in Alaska over the last five years. The subduction zone produces very large earthquakes—as large as anywhere in the world—including three of the twelve largest earthquakes ever recorded. 4. Sendai, Japan, 11 March 2011 (9.0) Alaska also played home to the largest on-land quake in North America when a 7.9 quake struck the Denali fault in Central Alaska in 2002, according to the commission. Date MMI Mag. The 1964 Alaska earthquake, one of the largest earthquakes ever recorded, was a 9.2-magnitude quake, Ebel said. The impact was heard from over 50 miles away, likely partially due to the rock-slide that was said to be about 90 million tons. It’s unlikely that any aftershocks will be as strong as the original quake, but it is possible, he said. Alaska has 11% of the world’s earthquakes, and 3 of the 6 largest in recorded history were located there. The map shows the epicenter of the 1964 Alaska Earthquake (red star), caused when the Pacific Plate lurched northward underneath the North American Plate. Across south-central Alaska, ground fissures, collapsing structures, and tsunamis resulting from the earthquake caused about 131 deaths. This is an incomplete list of earthquakes in Alaska. Scientific Background. Magnitude six and seven earthquakes can nearly happen anywhere in Alaska. 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. It was the largest U.S. earthquake ever recorded, and a … The largest earthquake to hit the U.S. was on March 28, 1964, when a 9.2 magnitude quake struck Prince William Sound in Alaska. Alaska -- vulnerable to large earthquakes because of tectonic plates sliding past each other under the region -- has the strongest recorded earthquake in U.S. history with a … https://www.yahoo.com/gma/7-8-magnitude-earthquake-alaska-172958965.html The largest of those was a 8.2 quake in 1938. Located in Southeast Alaska, this 7.8 magnitude earthquake produced what is now known to be the tallest tsunami in the world. According to the USGS, since 1900 there have been six other earthquakes of magnitude 7.0 and higher within 155 miles of Tuesday’s quake. The plate movement has the capacity to shake the earth and cause significant damage. In 1953, the largest earthquake in the region happened at 4:58 am local time and had a magnitude of 9.0, making it the 5 th largest earthquake ever recorded. Since 1900, Alaska has had 1 magnitude 7 or 8 earthquakes per year, 45 earthquakes of magnitude 6 or 7, and 10,000 quakes overall annually. Science Features: The 1964 Alaska Earthquake & Tsunami. 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