Meteor explosions like this year’s Russian fireball more common than thought

https://www.sciencenews.org/article/meteor-explosions-years-russian-fireball-more-common-thought

by Andrew Grant
1:22pm, November 6, 2013

Meteor impacts such as February’s explosion over Chelyabinsk, Russia, the most powerful observed in a century, may occur more frequently than thought. An analysis of recorded impacts over the past two decades suggests that Chelyabinsk-sized objects strike the planet every few decades, on average, rather than once every century or two.

-----