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The matter of large tsunamis come up in another thread on thermonuclear explosions. Very large earthquakes Mag 8 and greater, produce energies well above the largest manmade thermonuclear detonation. They can also create large tsunamis. The 1964 earthquake produced large tsunamis in Alaska and the northern Pacific. I thought we had discussed this in a thread here, but I can't find such a discussion.
1 Mag 9 earthquake ~ 900 Mag 7 earthquakes
USGS has a number of articles on the 1964 Great Alaska earthquake.
http://www.aeic.alaska.edu/quakes/Alaska_1964_earthquake.html
http://earthquake.usgs.gov/earthquakes/states/events/1964_03_28.php
There was a large tsunami in Lituya Bay, Alaska in 1958. A large landslide at the head of the bay caused an immense tsunami in the bay.
Such large earthquakes could happen in the future since the subduction of the Pacific Plate at the Aleutian Trench is ongoing.
The 1964 Great Alaska Earthquake occurred on Good Friday, March 27th. It and rocked the state with strong ground shaking for 4.5 minutes. At magnitude 9.2, it was the second largest quake ever recorded by seismometers. This animation shows the underlying causes of that earthquake, and tells how research done on the ground deformation contributed to confirmation of early theories of plate tectonics.
1 Mag 9 earthquake ~ 900 Mag 7 earthquakes
USGS has a number of articles on the 1964 Great Alaska earthquake.
http://www.aeic.alaska.edu/quakes/Alaska_1964_earthquake.html
http://earthquake.usgs.gov/earthquakes/states/events/1964_03_28.php
There was a large tsunami in Lituya Bay, Alaska in 1958. A large landslide at the head of the bay caused an immense tsunami in the bay.
Such large earthquakes could happen in the future since the subduction of the Pacific Plate at the Aleutian Trench is ongoing.
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