For sky-watchers, the reports bring to mind the famous Tunguska event of 1908 in remote Siberia.

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Regardless, researchers are hoping that the Tunguska event can help them better prepare for future meteor collisions.

CNN: Tunguska

This Asteroid did not even hit the Ground and this is known by most as the TUNGUSKA EVENT.

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The "Tunguska Event" that flattened over 800 square miles of Siberian forest in 1908 was caused by a stony asteroid only 50 meters in diameter exploding in the lower atmosphere.

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For sky watchers, the reports bring to mind the famous Tunguska event of 1908 in remote Siberia, in which an asteroid entered the atmosphere and exploded, leveling trees over an area of 820 square miles -- about two-thirds the size of Rhode Island.

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If asteroids as big as DA14 pass close to Earth once every decade or two, and meteors as large as the Chelyabinsk one impact once every 100 years (a similar meteor having caused the Tunguska event in 1908), the chance of both events happening on any one day are indeed very small: 1 in 3, 650 days times 1 in 36, 500 days, or about 1 in 100 million -- not odds you would bet against.

CNN: A meteor and asteroid: 1 in 100 million odds

It's also unlikely that this event would happen within 3, 000 miles of the Tunguska impact.

CNN: A meteor and asteroid: 1 in 100 million odds

The close fly-by of an asteroid like DA14, like the Tunguska meteor, is a once-in-100-years event.

CNN: A meteor and asteroid: 1 in 100 million odds

The close fly-by of an asteroid like DA14, like the Tunguska meteor, is a once-in-1, 000-years event.

CNN: A meteor and asteroid: 1 in 100 million odds