Quote:
Originally Posted by theking
The blast was heard and felt up to 55 miles (89 km) away.[63] Seismometers at Science Museum Oklahoma in Oklahoma City, 4.3 miles (6.9 km) away, and in Norman, Oklahoma, 16.1 miles (25.9 km) away, recorded the blast as measuring approximately 3.0 on the Richter scale.
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Yeah well another weird thing about OK city was the fact there was a crater at all, the lack of post-blast noxious fumes as well as the very slight amount of potassium nitrate in the residue collected after the event...
:D