Meteor blast over Bering Sea was 10 times size of Hiroshima

Fireball over Kamchatka peninsula in December went largely unnoticed at the time

A meteor explosion over the Bering Sea late last year unleashed 10 times as much energy as the atomic bomb that destroyed Hiroshima, scientists have revealed.

The fireball tore across the sky off Russia's Kamchatka peninsula on 18 December and released energy equivalent to 173 kilotons of TNT. It was the largest air blast since another meteor hurtled into the atmosphere over Chelyabinsk, in Russia's south-west, six years ago, and the second largest in the past 30 years.