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ZankerH comments on Open thread, February 15-28, 2013 - Less Wrong Discussion
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The Chelyabinsk meteorite wasn't anything like "once-in-a-century". Off the top of my head, here's a couple recorded a few years ago:
http://www.youtube.com/watch?v=pRtucs6D0KA
http://www.youtube.com/watch?v=8q3qWV4Ks3E
And that's just events in inhabited areas witnessed by people with a camera. Most of the Earth is either ocean or uninhabited wilderness, so it stands to reason that most such events will go unrecorded.
The first video doesn't show a meteor, it shows trails from a plane, lit by the setting sun.
As for the second one... "The meteoroid ... is estimated to have been about the size of a desk and have had a mass of approximately 10 tonnes."
Compare to the Chelyabinsk meteor: "With an initial estimated mass of 10,000 tonnes, the Chelyabinsk meteor is the biggest object to have entered the Earth's atmosphere since the 1908 Tunguska event, and the only meteor known to have resulted in a large number of injuries."