What Causes the ‘Sound’ of a Thunderclap and Why Is It So Loud?

Thunder is the sound we hear after seeing lightning. When lightning hits, it heats up the air so fast that the air around it expands and creates a big boom, like when you pop a balloon really quickly! The farther away the lightning is, the longer it takes for the sound to reach us, which is why thunder sometimes seems to rumble.

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Examples

  1. When you hear a big boom after seeing a flash in the sky, that's thunder.
  2. Thunder feels louder when it’s closer to you, like when it seems to shake your chest.
  3. Sometimes you can feel the ground rumble along with the sound of thunder.

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