Icebergs Ring Like Bells When They Crack
Large icebergs produce low-frequency tones as internal stresses cause tiny fractures to form and propagate. These vibrations travel through both ice and water, creating sounds that hydrophones can detect many kilometers away. Scientists use the acoustic signatures to monitor iceberg stability and breakup.
💡 Fun detail:
Some icebergs emit a continuous hum similar to a distant church bell for hours before a large piece calves off.
Source: NASA