On April 23, 2001, a gigantic flash of light was recorded by US satellites hundreds of miles above the Pacific Ocean southewest of Los Angeles. The Air Force’s Technical Applications Center issued a press release on May 25 stating that the flash was not nuclear. This is believed to have been the third largest explosion recorded in the upper atmosphere since global satellite observations started 25 years ago.

The blast was about the size of the Hiroshima bomb and sensors detected the sound as far away as Los Alamos.

US satellites regularly detect the explosion of meteors entering the earth’s atmosphere.

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