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From May 2018 to mid-2019, a series of earthquakes were recorded on the east coast Africa. In these Telluric movements, a Low frequency earthquake Its waves spread across the planet for 20 minutes. Now, a team of scientists reports that this was made by seismic action The birth of a huge volcano.
New volcanic eruption 50 km from Mayotte Island (between Madagascar and the African continent) Height 820 meters At sea. Pictures of a study published in the journal Natural Earth Science Reveal that there was no volcano before the aforementioned seismic events.
How did the new volcano form?
A team from the University of Paris began monitoring the area between February 25 and May 6, 2019. During that time, they discovered 17,000 earthquakes. 20 to 50 kilometers below From the bottom of the ocean. This finding is very unusual because most earthquakes are very shallow.
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They also recorded 84 low-frequency earthquakes, a type of movement that commonly occurs Subdivisions, In which one tectonic plate sinks down to another. However, there is no indication of this process in the region.
With all this data, the team reconstructed the chain of events that led to the birth of the volcano:
Chronology of eruption. Image: Fulet et al.
The solid layer covering the Earth’s crust began with a magma deposit at the boundary between the molten mantle and the lithosphere. Scientists say tectonic processes have damaged the lithosphere in that area, creating openings and allowing magma to penetrate the surface. The event would have caused a crowd of recorded earthquakes between 2018 and 2019.
Finally, The magma reached the ocean and exploded, Which produced five cubic kilometers of volcano. All of these materials formed the new volcano.
“This is the largest active underwater eruption ever documented,” the authors wrote in the article.
Researchers have set up a laboratory around the volcano, which is located between them The crust of East Africa and Madagascar. Therefore, new submarine eruptions and other volcanic events are expected in the region in the future.
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