Here is a nice infogram summarising information on the meteor which exploded over the Urals, in Russia, last Friday. Click twice to enlarge.
Credit - UK Telegraph: Meteor5.png .
But talk about a cosmic coincidence. here we were looking in one direction to watch the flyby of asteroid 2012 DA14 (see Should we be prepared?) when another one, previously undetected, scores a direct hit coming form another direction. Imagine if the Russian one had flown by while the larger asteroid 2012 DA14 hit directly. The damage would have been far greater.
Sort of underlines the need for humanity to develop better systems for early detection of near earth objects, and the ability to divert them where necessary.