[...]
At 03:20 GMT on 15 February, a natural object entered the atmosphere and disintegrated in the skies over Chelyabinsk, Russia.
Extensive video records indicate a northeast to southwest path at a shallow angle of 20° above the horizontal. The entry speed is estimated at around 18 km/s — more than 64 000 km/h.
According to calculations by Peter Brown at the University of Western Ontario, Canada, drawing on extremely low-frequency sound waves detected by a global network, the object is estimated to have been about 17 m across with a mass of 7000–10 000 tons when it hit atmosphere.
It exploded with a force of nearly 500 kilotons of TNT — some 30 times the energy released by the Hiroshima atomic bomb — around 15–20 km above the ground.
[...]
Russia asteroid impact: ESA update and assessment
CharlesWT
I wonder if the citizens of Hiroshima are sick and tired of being referenced after every energy releasing disaster?
More on the strike…
http://news.discovery.com/space/asteroids-meteors-meteorites/russian-meteor-analysis-orbit-apollo-asteroid-130226.htm
Regarding Hiroshima…
My son went to Japan last fall for a conference, and afterwards met up with his son and and a nephew for a 6-day tour of the country. He said that people were very pleased when they heard he was planning to visit Hiroshima. They don’t seem to harbor any resentment against Americans, but they like for us to show interest in their tragic site.