Global One (G1)— On Nov. 11, the French island of Mayotte — located off the coast of Africa in the Indian Ocean — experienced 20 minutes of seismic wave ringing.

From Mayotte, the ringing spread across Africa and was picked up as far as Hawaii — almost 11,000 miles away.

The odd part is no one seems to have felt them —and scientists are baffled as to what caused it.

One seismologist said, “I don’t think I’ve seen anything like it.”

Normally, the type of wave pattern recorded wouldn’t be so unusual — it usually follows large earthquakes.

Mayotte experienced a swathe of mostly minor earthquakes since May — but they had been in decline before the mysterious sound was detected.

French scientists say it could have been caused by magma movement deep underwater.

They may be on to something because GPS reportedly shows the island has moved two inches southeast since May.

Or it could just be sea monsters.