a non fiction book about the 1972 solar flare causing mines to explode and causing damage to power plants

I just read a little story about how all of these American mines just started exploding by themselves in Viet Nam during the war. I would love to read a good human interest story about how they figured out what was happening. If that is too specific, I would read any book about similar "mysteries" that had people stumped until they figured out a natural cause