I just checked the news today, and it's what I expected for updated info:
The 55 foot wide rock, said by Nasa to have a mass of 10,000 tonnes[.]
Nasa estimated that the energy released as the meteor's disintegrated in the atmosphere was 500 kilotons[.]
It entered the atmosphere at 44,000 miles per hour, taking 32.5 seconds to break up at an altitude of around 15 miles above the earth's surface.
Divers were this morning searching the Chelyabinsk region's frozen Lake Chebarkul for a fragment of the meteorite.
I said it should have been about the size of a large house, and I was right on the money. It came in at 12 miles per second (close to my 18 mi/sec prediction) and exploded in the middle of the stratosphere, where pressure was about 1% of what we see at ground level. Although 30 times more forceful than the Hiroshima nuclear strike, it had to propagate down into much thicker air, which greatly moderated the effect. Hence, a lot of broken windows and not much else.