This Week in Alaskan History: On April 1, 1946 a massive undersea earthquake off the coast of Alaska triggered a tsunami that reached as far as Hawaii. It prompted the U.S. to establish the Seismic Sea Wave Warning System just two years later. 04/01/46 Undersea Earthquake and Alaska In the middle of the night, 13,000 feet beneath the ocean surface, a 7.4-magnitude tremor was … [Read more...]