Jul 8 1962
From The Space Library
Megaton-plus hydrogen device exploded at more than 200-mi. altitude, lofted by carrier Thor rocket from Johnston Island in the Pacific as a part of Operation Dominic. It was the highest thermonuclear blast ever achieved and lighted up the Pacific sky from Wake Island to New Zealand, causing some communication disruption but less than predicted. Success followed two previous attempts on June 4 and June 19. It was expected that TRAAC satellite launched in November 1961 would be in a position to measure the influence of the blast upon the Van Allen belt.
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