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Thunder is the sound caused by lightning.[1][2][3] Depending upon the distance from and nature of the lightning, it can range from a long, low rumble to a sudden, loud crack. The sudden increase in temperature and hence pressure caused by the lightning produces rapid expansion of the air in the path of a lightning bolt.[4] In turn, this expansion of air creates a sonic shock wave, often referred to as a "thunderclap" or "peal of thunder". The scientific study of thunder is known as brontology and the irrational fear (phobia) of thunder is called brontophobia.
- ^ "Severe Weather 101: Lightning Basics". nssl.noaa.gov. Retrieved October 23, 2019.
- ^ "Thunder Facts". factsjustforkids.com. Retrieved October 23, 2019.
- ^ "The Sound of Thunder". weather.gov. Retrieved October 23, 2019.
- ^ "What Causes Lightning and Thunder?". NOAA. 2022.