A large glowing lava boulder is pushed outwards at from the area where the vent opened on the slope of the Sciara (image: INGV)
INGV published an incredible video showing the opening of the effusive vent at around 700 m elevation yesterday afternoon: as magma pushed itself outwards laterally, a very large block of glowing hot lava was pushed or almost thrown outwards onto the steep slope, where it quickly disintegrated into a turbulent hot block and ash flow (pyroclastic flow) racing down towards the coast: