How long did the 1946 Aleutian Islands earthquake last?
The wave reached Kauai, Hawaii 4.5 hours after the quake, and Hilo, Hawaii 4.9 hours later….1946 Aleutian Islands earthquake.
| Fleeing an approaching tsunami in Hilo, Hawai’i | |
|---|---|
| Magnitude | 8.6 Mw |
| Depth | 15 km (9.3 mi) |
| Epicenter | 53.49°N 162.83°WCoordinates:53.49°N 162.83°W |
| Areas affected | Hawaii, Alaska United States |
How many people died to the tsunami of 1946?
159 people
On April 1, 1946, an undersea earthquake off the Alaskan coast triggers a massive tsunami that kills 159 people in Hawaii. In the middle of the night, 13,000 feet beneath the ocean surface, a 7.4-magnitude tremor was recorded in the North Pacific.
How fast did the 1946 tsunami travel?
roughly 490 miles an hour
The waves traveled southward to Hawaii with an average speed of roughly 490 miles an hour, a wave length of nearly 100 miles, and a height in the open sea which is thought to have been 2 feet or less.
Are earthquakes common in the Aleutian Islands?
The Aleutian arc is a seismically active region, evidenced by the many moderate to large earthquakes occurring each year. Since 1900, this region has hosted twelve large earthquakes (M>7.5) including the May 7, 1986 M8.
What caused the 1946 Aleutian tsunami?
A Pacific-wide tsunami was triggered by the earthquake, which had a surface-wave magnitude of 7.8, an epicenter of 52.8° N, 163.5° W, and a focal depth of 25 km. Before the tsunami dissipated it took the lives of more than 165 people and cause over $26 million (1946 dollars) in damage.
What was the approximate speed of the tsunami when it reached Hawaii miles hour?
The waves traveled southward to Hawaii with an average speed of roughly 490 miles an hour, a wave length of nearly 100 miles, and a height in the open sea which is thought to have been 2 feet or less.
How deep is the Aleutian Trench?
25,000 feet
The Aleutian Trench is about 2200 statute miles long, 50 to 100 miles wide, and has a maximum depth of slightly over 25,000 feet. The north side of the trench slopes 3°–4° and the south side l°–4°.
How long is the Aleutian Trench?
The Aleutian Trench, extending 2,900 kilometers from the Gulf of Alaska to Kamchatka, marks the place where the Pacific plate is being subducted beneath the North American plate. The two plates are approaching each other at about 6 centimeters a year.
What is the biggest tsunami ever recorded?
Lituya Bay
Biggest tsunami ever recorded was in Lituya Bay, Alaska, it’s height – astonishing 524 meters (1724 ft.) On July 9, 1958, an earthquake of magnitude 7.7 (on the Richter scale), caused 90 million tonnes of rock and ice to drop into the deep water at the head of Lituya Bay.
