Ivy Operation Castle Operation Redwing Nuclear fission Meteor Crater, or Barringer crater – a deeper crater that formed in a natural impact event with the release of about the same amount of energy: 10 megatons. Krakatoa – a larger island that was destroyed by a much more powerful natural volcanic explosion. Explosion crater References External links "Mike" Test from PBS Former islands Nuclear weapons Enewetak Atoll Explosion craters Articles containing video clips Islands of the Marshall Islands