Thunder FAQs:

Q: Is Thunder the sound caused by lightning?

A: Yes.

Q: Is Thunder sufficient to cause injury?

A: Yes, such as internal contusion, to individuals nearby.

Q: Is Thunder seldom heard at distances over 20 kilometers?

A: Yes, A very bright flash of lightning and an almost simultaneous sharp "crack" of thunder, a thundercrack, therefore indicates that the lightning strike was very near.