Barometric Waves and the Global Detection The loud noise was not just a series of audible reports; it was a massive atmospheric pressure pulse. The Tsunami and the Pyroclastic Surge The collapse of the volcanic cone displaced an enormous amount of water, generating a tsunami that reached heights of over 30 meters in some locations.
How Far Did the Krakatoa Explosion Noise Travel? Facts on Sound Distance
1,300 km (800 miles) Sound like thunder or artillery fire heard in Rodrigues Approx. As pressure built within the magma chamber, the final collapse of the volcano’s northern wall turned the stored energy into a cataclysmic directed explosion, effectively converting the energy of an entire mountain into a shockwave.
This massive displacement of water and the subsequent surge of superheated gas and rock, known as a pyroclastic flow, moved at incredible speeds and produced immense low-frequency sounds that were part of the overall acoustic phenomenon. These low-frequency waves are less affected by atmospheric absorption and can travel immense distances without losing significant energy, which explains why the sound was heard thousands of kilometers away.
How Far Did the Krakatoa Explosion Noise Travel?
4,800 km (3,000 miles) Pressure waves recorded by barographs in London and Vienna Approx. Temperature inversions, where a layer of cool air sits beneath a layer of warmer air, can act as a waveguide for sound waves, trapping them and allowing them to travel much farther than they normally would in normal atmospheric conditions.
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