11 November 2018 Mayotte seismic event

August 2020 thumb|right|Mayotte is an island group near Madagascar, in the Indian Ocean On 11 November 2018, a seismic event of unknown origin occurred about 15 mi km flip off the coast of Mayotte, an overseas department and region of France in the Indian Ocean. It was recorded by seismograms globally, including in Kenya, Chile, New Zealand, Canada, and Hawaii, almost 11000 mi km flip away. Despite this, no one felt it. The seismic waves lasted for over 20 minutes. 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 wavehttps://bigthink.com/surprising-science/mystery-seismic-wave?rebelltitem=1#rebelltitem1 An unexplained seismic event 'rang' across the Earth in November Robber Berman 2019-01-26 2018-11-29 Big Think travelling at 9000 mph flip around the globe.https://www.forbes.com/sites/trevornace/2018/12/03/strange-waves-rippled-across-earth-and-only-one-person-spotted-them/#20938576aaab Strange Waves Rippled Across Earth And Only One Person Spotted Them Trevor Nace 2019-01-26 Forbes 2018-12-03 Additionally, the signal released by the earthquake resembled a clean sine wave, while most earthquake waves have multiple frequencies.https://www.nationalgeographic.com/science/2018/11/strange-earthquake-waves-rippled-around-world-earth-geology/ https://web.archive.org/web/20181128151627/https://www.nationalgeographic.com/science/2018/11/strange-earthquake-waves-rippled-around-world-earth-geology/ dead 28 November 2018 Strange waves rippled around the world, and nobody knows why National Geographic Maya Wei-Haas 2018-11-28 2018-11-30 Cause The cause of the event was initially unknown,https://www.news.com.au/technology/science/strange-seismic-waves-were-picked-up-circling-the-globe-on-november-11-now-seismologists-are-trying-to-figure-out-why/news-story/31a4e88570f95dfea9e1a0fe7a7daf2e Strange seismic waves were picked up circling the globe on November 11. Now seismologists are trying to figure out why 2018-11-29 2019-01-26 News Limited Australiahttps://www.bustle.com/p/unusual-seismic-waves-shook-the-earth-on-nov-11-scientists-still-dont-completely-know-why-13221267 Unusual Seismic Waves Shook The Earth On Nov. 11 & Scientists Still Don't Completely Know Why Peters Lucia 2019-01-26 2018-11-29 Bustle 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 suggested was that magma from a volcanic chamber approximately 10 mi flip miles underneath the seafloor near Mayotte had suddenly drained, which could have led to the collapse of the roof of the chamber, causing the vibrations.Sample Ian 2018-11-30 'Magma shift' may have caused mysterious seismic wave event https://www.theguardian.com/science/2018/nov/30/magma-shift-mysterious-seismic-wave-event-mayotte 2019-01-26 The Guardian en-GB 0261-3077 In May 2019, a recently formed 800 meter high undersea volcano was found in the area of the event. This volcano is now assumed to have been the cause of the tremors.https://www.science.org/content/article/ship-spies-largest-underwater-eruption-ever Ship spies largest underwater eruption ever Roland Pease 2019-05-22 2019-05-21 ScienceGlobal Volcanism Program, 2020. Report on Mayotte (France) (Bennis, K.L., and Venzke, E., eds.). Bulletin of the Global Volcanism Network, 45:3. Smithsonian Institution. https://doi.org/10.5479/si.GVP.BGVN202003-233005Starr, M. (30 September 2021). Largest underwater eruption ever recorded gives birth to massive New Volcano. ScienceAlert. Retrieved October 23, 2021. References Further reading Bhattacharya S. 2020 https://www.currentscience.ac.in/Volumes/118/07/1069.pdf Source of unusual monochromatic wave packets recorded globally in the seismograms of 11 November 2018 Current Science 118 7 1069–1076 10.18520/cs/v118/i7/1069-1076 Category:2018 earthquakes Category:November 2018 in France Category:Earthquakes in France