The asteroid shock wave in Russia circled the planet twice

The shock wave of the asteroid that fell in Russia in February this year was so strong that it circled the planet twice, scientists say.

The BBC writes that scientists used sensor systems set up to detect nuclear tests, and said the asteroid impact was the most powerful event ever recorded by the network.

More than a thousand people were injured when an asteroid 17 meters in diameter and weighing 10.000 tons burned up over Chelyabinsk, Russia

The energy of the impact was equal to 460 kilotons of TNT, which makes it the most powerful energy impact known since the meteor strike in Siberia in 1908.