Scientists only recently pinpointed the blast - the third-largest known meteor explosion - by triangulating readings from infrasound stations, which pick up low-frequency noises that humans can't hear, New Scientist says. The blast measured 173 kilotons - for reference, the atomic bomb dropped on Hiroshima only measured 15 kilotons.
Gauging 656ft wide, the planetoid was named 2011 EO40 and 6 years ago traveled into Earth's atmosphere at a whopping 41,600mph, issuing 30 times more energy than diagnosed at Hiroshima.
A meteor explosion over the Bering Sea late past year unleashed 10 times as much energy as the atomic bomb that destroyed Hiroshima, scientists have revealed.
Lindley Johnson, planetary defence officer at NASA, told the BBC that the fireball came close to commercial flight routes between North America and Asia and that airlines had been contacted to check if there had been any sightings.
On December 18th, at noon (Russia time) a giant space rock hit the Earth's atmosphere with a speed of 32km/s on a steep trajectory of seven degrees, as BBC reported. The Near-Earth Object Camera, or NEOCam, is a proposed space-based mission to survey smaller objects, but it hasn't been selected by NASA for launch.
Military satellites picked up the blast previous year; Nasa was notified of the event by the US Air Force. That's another thing we have in our defense.
The December explosion above the Bering Sea shows larger objects can collide with us without warning and highlighted the need for enhanced monitoring.
Meteors like this are dubbed as "problems without passports" because they have the prospective to affect entire regions if they clash with Earth. But scientists estimate it will take them another 30 years to fulfil this congressional directive.
As to why one of the largest meteor impacts in recent history may have totally passed you by, that's likely because the space rock in question shattered over the Bering Sea, a cold stretch of the Pacific Ocean between Russian Federation and Alaska, miles from inhabited land.