Now it's really huge or so they say

A later report on the meteorite crashing in Russia has upped the injury toll to 1,200.  That I can understand.  What I can't understand is that the article claims that NASA has estimated that the amount of energy released from impact with the atmosphere was about 30 times greater than the force of the nuclear bomb dropped on Hiroshima.  That bomb destroyed Hiroshima almost totally.  It killed over 100,000 on the day of the explosion and many more from its aftereffects. No one has been reported killed by the crash.  No buildings have been obliterated.  Was this a different kind of energy?