Post #984

🌎 Mysterious low-frequency sounds known as "The Upsweep" have been picked up by underwater microphones in the Pacific Ocean since 1991. This persistent sound rises and falls in pitch, lasts several seconds, and is strongest in spring and autumn. Its source remains unidentified, but some researchers suggest volcanic activity near the origin point may be involved. ✨ #ocean⚡#mysteries⚡#sound 👉subscribe Interesting Planet 👉more Channels ​