Brontides: natural explosive noises.

@article{Gold1979BrontidesNE,
  title={Brontides: natural explosive noises.},
  author={Thomas Gold and S L Soter},
  journal={Science},
  year={1979},
  volume={204 4391},
  pages={371-5}
}
Episodes of explosive noises of natural origin, or brontides, have been well documented, often in association with seismic activity and in a few cases as precursors to major earthquakes. Ground-to-air acoustic transmission from shallow earthquakes can account for many of these episodes, but not for all, and other causes, such as the sudden eruption of gas… CONTINUE READING