Scientists watch rare event unfold after unusual seismic activity was recorded in the Indian Ocean.
, provide a"detailed picture of a deep, rare magmatic process" that ended with a new volcano being born.
These new forms of earthquake signals were so strong they could be detected from thousands of miles away. They would last for between 20 and 30 minutes and were characterized by low frequencies. Similar signals had previously been associated with large caldera volcanoes.Researchers believe what they were recording was the movement of magma deep beneath the Earth's surface.Cesca et al.
Cesca added:"The magma started to propagate from a deep chamber upward, first intruding in the crust, and producing earthquakes, but not yet an eruption. When the magma reaches the seafloor, then it can flow more easily and the chamber drainage is faster. This produced a stronger surface deformation and, for example, subsidence at Mayotte island." He said that while there is some seismic activity there still, it appears the magma outflow is ending.
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