text: The earth is bombarded with ~ 1000 metric tons of meteroite PER DAY, so this is not an 'exceptional event' on a global basis.  Remember that 70% of the earth is uninhabited and not under surveillance.\n\nAs to comparing it with 'Hiroshima', this is a typical media exaggeration.  My calculations show that with a 100 kg meterorite traveling at 11000 m/s (the maximum speed it could attain coming from outer space), the energy would be about 1/14000th of the nuclear energy released from the conversion of 0.1 gram of uranium into energy by the Einstein relationship E = mc^2