In a study the scientists dub a “call to action,” researchers analyzed a recently declassified government report showing an extreme solar storm detonated 25 sea mines in Vietnam over just 30 seconds on Aug. 4, 1972, as Air Force pilots watched. The review suggests it was a “Carrington” class storm.

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In a study the scientists dub a “call to action,” researchers analyzed a recently declassified government report showing an extreme solar storm detonated 25 sea mines in Vietnam over just 30 seconds on Aug. 4, 1972, as Air Force pilots watched. The review suggests it was a “Carrington” class storm.