wouldve seemed to leave a decent crater regardless with that much energy, unless it was all above ground, as in gas ???
A crater "10 feet deep by 100 feet wide, per report *here.* A shaped charge at the bottom of the bulk AN pile, firing upward, might have such an effect, sending the explosive wave upward and outward.
wouldve seemed to leave a decent crater regardless with that much energy, unless it was all above ground, as in gas ???
"Authorities have eliminated natural gas as cause of explosion" says CNN.