Yes. For example.
That is a substantial upgrade! Taking the new diameter and assuming a 13 km/sec impact velocity, with a chondritic composition and density gives a yield of 130 kilotons. There's an online calculator somewhere that will do the same calculation. If you find it and get a different answer let me know - I think I've got my unit conversions and decimals in the right place, but I've never double checked my own Excel calculator. Incidentally if it was an iron (which I doubt) the energy yield would be double.
pretty good back-o-the napkin work there! had it been iron, it may not have broken apart and so localized the yield (big crater), but as i understand it the energy brung is a function of the mass & speed, and whether the brunger is stone or iron is a matter of how that energy is distributed.
from Spaceweather.com, February 16, 2013
...Researchers including Prof. Peter Brown of the University of Western Ontario along with NASA experts have conducted a preliminary analysis of the event. "Here is what we know so far," says Bill Cooke, head of NASA's Meteoroid Environment Office. "The asteroid was about 15 meters in diameter and weighed approximately 7000 metric tons. It struck Earth's atmosphere at 40,000 mph (18 km/s) and broke apart about 12 to 15 miles (20 to 25 km) above Earth's surface. The energy of the resulting explosion was in the vicinity of 300 kilotons of TNT." (continued below)...
ps i wager that within 2 days we see a shirtless Putin hefting the lake rock overhead, or a reasonable facsimilie thereof. may the farce be with you.
Edited by Turtle, 15 February 2013 - 10:59 PM.