Dude, where's my elephant ?
Scientists Dr Beth Mortimer and Prof Tarje Nissen-Meyer discovered that elephants generate vibrations through their normal movements and through vocalisations, known as "rumbles". These can be measured by techniques usually used for studying earthquakes.
They explained how they measured the seismic waves that could travel nearly four miles through the ground. They recorded the vibrations generated by wild elephants in Kenya while walking and calling, using instruments known as geophones.
They filmed the animals during recordings and later synchronised the two to allow them to visually confirm that the vibrations originated from elephants. They found that other noise and soil type affected their ability to distinguish the patterns over long distances. Vibrations travel farther through sand than through hard rock and also when little other noise is present to interfere.
https://www.bbc.com/news/technology-46289641
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