11 November 2018 Mayotte seismic event

On 11 November 2018, a seismic event of unknown origin 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 globally, including in Kenya, Chile, New Zealand, Canada, and Hawaii, almost 18,000 kilometres (11,000 mi) away.

[2] The island of Mayotte had experienced hundreds of tremors since May 2018, including a magnitude 5.8 earthquake on 15 May.

[3] Another possible explanation that was suggested 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 collapse of the roof of the chamber, causing the vibrations.

[6] In May 2019, a recently formed 800 meter high undersea volcano was found in the area of the event.