* K-T extinction (65 MYA) -- 10^14 t = 100,000,000 Mt (complete detonation of ~2 million tons fusion fuel)
I'm not sure how far you can compare these figures -- issues like (i) how much energy is released as an atmospheric shock wave vs. infrared radiation vs. heat; (ii) what altitude the explosion is at.
* Annual impact -- 5-20 kt (~Hiroshima)
* Indonesia superbolide (2009) -- 50 kt
* Tunguska (Siberia 1908) -- 10-15 Mt (~large hydrogen bomb)
* K-T extinction (65 MYA) -- 10^14 t = 100,000,000 Mt (complete detonation of ~2 million tons fusion fuel)
I'm not sure how far you can compare these figures -- issues like (i) how much energy is released as an atmospheric shock wave vs. infrared radiation vs. heat; (ii) what altitude the explosion is at.
http://www.nature.com/news/2002/021121/full/news021118-7.htm...
http://www.nature.com/nature/journal/v420/n6913/full/nature0...
http://neo.jpl.nasa.gov/news/news165.html
http://en.wikipedia.org/wiki/Tunguska_event
http://en.wikipedia.org/wiki/Cretaceous%E2%80%93Tertiary_ext...