Chelyabinsk,Russia—A meteorite (陨石) moved quickly across the sky and exploded over central Russia on Feb.15,2017,raining fireballs over a vast area and causing a shock wave that smashed windows,damaged buildings and injured 1,200 people.
People heading
to work
in
Chelyabinsk
heard
what sounded like an explosion,saw a bright light and then felt the shock wave,according to a Reuters journalist in the industrial city 1,500 km east of Moscow.
The fireball,travelling at a speed of 30 km per second according to Russian space agency Roscosmos,had blazed (熊熊燃烧) across the horizon,leaving a long white trail that could be seen as far as 200 km away.
Car alarms went off,thousands of windows were broken and mobile phone networks were interrupted for a short time.The Interior Ministry said the meteorite explosion,a very rare spectacle,also released a great explosive sound.
“I was driving to work.It was quite dark,but it suddenly became bright as if it were day,” said Viktor Prokofiev,36,a resident of Yekaterinburg in the Urals Mountains.“I felt like I was blinded by headlights.”
The meteorite,which weighed about 10 tonnes and may have been made of iron,entered Earth’s atmosphere and broke apart 30 km50 km above ground according to Russia’s
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