Science Alert November 29, 2018
While the cause of this mysterious disturbance remains unknown, it’s somehow linked to an ongoing seismic swarm that’s been rumbling the archipelago of Mayotte in the Indian Ocean for several months. The researchers’ best guess is the anomalous vibration was also linked to volcanic activity, perhaps due to a huge movement of magma under the Indian Ocean. GPS readings indicate that since July – after the swarm began – the island has shifted approximately 60 mm (2.4 in) to the east and 30 mm (1.2 in) south. According to one analysis, this movement could be due to the emptying of a magma reservoir nearby, although additional research would be needed to verify this…read more.
The earthquake swarm (BRGM)