The Russian meteor was larger previously thought but how much larger? NASA has revised its estimates on the size and power of the meteor at least 3 times. The size is thought to have been about 55 feet (17 m) diameter- with the power of the blast estimate of about 500 kilotons, 30-60 kilotons higher than before (but the first estimate was less than one kiloton). That was the last from NASA.
This is about 30x the Hiroshima blast. Does anyone have an official Russian estimate? In this case, their estimate is probably more accurate.
