NEWS: Russian Meteor: Chelyabinsk Asteroid Had Violent Past
The Mirror also wandered down the conspiracy path, questioning how NASA even recorded the Feb. 6 impact, highlighting Plait's analysis that the atmospheric impact was likely detected by classified military technology.
Normally, atmospheric explosions are recorded by seismic monitors, microphones and/or satellite observations. As Plait pointed out, as the impact was in open ocean, it's not likely that seismic monitors would have been used to record the impact energy. As the military has pretty obvious reasons for monitoring atmospheric explosions, it seems likely the data came from a classified source, probably satellites.
Though an interesting energetic event, Feb. 6 isn't the only time the Earth has been hit by space rocks since Chelyabinsk. Every single day Earth is peppered with around 100 tons of space debris. The vast majority of this mass is no bigger than a grain of sand, and on a clear night you might be lucky to see these tiny specks burn up in the high atmosphere as meteors.