Underground Hydrogen Bomb Test - Man Made Earthquake

via videosift.com

From you tube description:

"This footage is from Project Cannikin, which was merely a proof-test for the 5 megaton warhead to be used on the Spartan missile system. Researchers were fearful of such a large device being detonated underground, so the testing was moved to way out in the middle of nowhere on the Amchitka penninsula in Alaska."

"The effect on the ground was necessary, and predicted, to see its pulse effect."

"The blast registered a 7.0 on the Richter scale and caused a subsidence crater over a mile wide and 60 feet deep, which filled with water and became the largest lake on the island. Rockfalls, containing over 46,000 square yards of material, smothered intertidal marine life. Nearly three hundred deceased rock greenling fish were found offshore, and subsequent catches of rock sole declined substantially"