Our rough calculation says a large meteor impact on the same day as closest passage of the DA14 asteroid is really improbable.

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

As researchers studied images of the McLaughlin Crater, a crater 57-miles across and 1.4 miles deep that formed as the result of an impact with a large meteor, they noticed sedimentary rocks.

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Large pieces of the meteor have yet to be found.

WSJ: Russia Meteor Was Largest in More Than a Century

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

And long-term human settlement will follow at some point, mainly to develop mineral and energy resources available on the Moon, but also to emplace protective systems aimed at avoiding large asteroid impacts of the type we were all recently made aware with that grazing meteor strike in Chelyabinsk and the simultaneous near-miss by big-rock DA14.

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