Thunder

Thunder is the sound produced by the rapid expansion and contraction of air surrounding a lightning bolt. This phenomenon occurs when lightning heats the air to extremely high temperatures, resulting in a shock wave that travels through the atmosphere. The sound can vary in intensity and duration, ranging from a sharp crack to a low rumble, depending on the distance from the observer and the atmospheric conditions. Thunder is typically associated with thunderstorms, where it often follows the flash of lightning. It is an integral part of the atmospheric phenomena linked to electrical storms and serves as a natural indicator of storm activity.