Thunder

Thunder is the sound caused by lightning. Depending on the nature of the lightning and distance of the listener, thunder can range from a sharp, loud crack to a long, low rumble (brontide). The sudden increase in pressure and temperature from lightning produces rapid expansion of the air surrounding and within a bolt of lightning. In turn, this expansion of air creates a sonic shock wave, similar to a sonic boom, which produces the sound of thunder, often referred to as a clap, crack, or peal of thunder. The distance of the lightning can be calculated by the listener based on the time interval from when the lightning is seen to when the sound is heard.

Read more about Thunder:  Cause, Etymology, Calculating Distance

Famous quotes containing the word thunder:

    So gladly, from the songs of modern speech
    Men turn, and see the stars, and feel the free
    Shrill wind beyond the close of heavy flowers,
    And through the music of the languid hours,
    They hear like ocean on a western beach
    The surge and thunder of the Odyssey.
    Andrew Lang (1844–1912)

    You will trail across the rocks
    and wash them with your salt,
    you will curl between sand-hills
    you will thunder along the cliff
    break retreat get fresh strength
    gather and pour weight upon the beach.
    Hilda Doolittle (1886–1961)

    There is not even silence in the mountains
    But dry sterile thunder without rain
    There is not even solitude in the mountains
    —T.S. (Thomas Stearns)