The explosion of a meteor over the Bering Sea is learned at the end of last year to have released 10 times more energy than the atomic bomb that destroyed Hiroshima. The fiery band crashed through the sky, somewhere near the Kamchatka peninsula, Russia on December 18, 2018, and scientists learned that the energy released was about 173 kilotons TNT.
The explosion in question was the biggest air blast, following another meteor that broke into the atmosphere over Chelyabinsk (southwest Russia) six years ago, and the second largest in the last 30 years.
Unlike what happened to the Chelyabinsk meteor, which was photographed by multiple mobiles, the December explosion went unnoticed because it exploded in a remote area of settlements.
NASA managed to get information on the meteor blast after the US air force spotted sparkles. According to NASA, explosions of this magnitude were expected to occur only two or three times a century.