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Originally posted by kalunom
Interesting there was shaking felt after...must have been something substantial.
Can a fireball create a sound? Will the sound occur right away, as you watch the fireball, or is their some delay?
There are two reported types of sounds generated by very bright fireballs, both of which are quite rare. These are sonic booms, and electrophonic sounds.
If a very bright fireball, usually greater than magnitude -8, penetrates to the stratosphere, below an altitude of about 50 km (30 miles), and explodes as a bolide, there is a chance that sonic booms may be heard on the ground below. This is more likely if the bolide occurs at an altitude angle of about 45 degrees or so for the observer, and is less likely if the bolide occurs overhead (although still possible) or near the horizon. Because sound travels quite slowly, at only about 20 km per minute, it will generally be 1.5 to 4 minutes after the visual explosion before any sonic boom can be heard. Observers who witness such spectacular events are encouraged to listen for a full 5 minutes after the fireball for potential sonic booms.