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They Dont Know Shirt, The 11 November 2018 Mayotte seismic event is a seismic event of unknown origin that occurred about 24 kilometres (15 mi) off the coast of Mayotte, an overseas department and region of France in the Indian Ocean. It was recorded by seismograms in many countries, including Kenya, Chile, New Zealand, Canada, and Hawaii, almost 18,000 kilometres (11,000 mi) away. Despite this, no one felt it. The seismic waves lasted for over 20 minutes.[2] Most earthquakes have P-waves and S-waves, which are later followed by long-period surface waves. The Mayotte event lacked P-waves and S-waves, but did cause a long-period surface wave travelling at 14,000 km/h (9,000 mph) around the globe. Additionally, the signal released by the earthquake was a clean “zigzag,” while most earthquake waves have multiple frequencies.

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They Dont Know Shirt , The cause of the event was initially unknown, but scientists from the French Geological Survey believe it may have been caused by an underwater volcano, and also related to an earthquake swarm nearby. The island of Mayotte had experienced hundreds of tremors since May 2018, including a magnitude 5.8 earthquake on 15 May. The quakes had been tapering off until the event occurred. Another possible explanation that was suggesed was that magma from a volcanic chamber approximately 16 km (10 mi) miles underneath the seafloor near Mayotte had suddenly drained which could have led to the roof of the chamber to collapse causing the vibrations. In May 2019, an 800 meter high undersea volcano was found that was not there before. This volcano is now assumed to have been the cause of the tremors. The seismologists noted the strange nature of the waves, they were unnaturally monotone and low-frequency as they traveled across the globe. When we think of seismic waves the most common association is an earthquake, which triggers a sudden release of fast moving waves at different frequencies. Toward the later tail of an earthquake’s rumbling, they do emit low-frequency waves that can spread out across the globe. For this to have been the case there would have had to be a major earthquake somewhere in the region, yet none was detected.

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