Stromboli volcano (Aeolian Islands, Italy) - Smithsonian / USGS Weekly Volcanic Activity Report for 11 November-17 November 2020 (Continuing Activity)

INGV reported that during 9-15 November activity at Stromboli was characterized by ongoing explosive activity from Area N (North Crater area) and in Area C-S (South-Central Crater area). Explosions from the N1 vent (Area N) ejected lapilli and bombs 80-250 m high, and produced ash emissions. Explosions at three N2 vents (Area N) ejected a mix of coarse and fine material at a rate of 6-10 events per hour.
Explosions from vents in Area C-S also ejected fine material 150 m high at a rate of 1-2 events per hour.



A series of at least four explosions began at 2104 on 10 November with a major, six-minute-long explosion in the southern part of Area C-S. The event ejected pyroclastic material which fell radially and along the Sciara del Fuoco, and produced a vertical ash plume. Within 30 seconds a second pulse of activity from the central crater area ejected coarse material 300 m above the vent and then produced in tense lava fountaining.
A small explosion from vent N2 concluded the series. During an overflight the next day, scientists identified thermal anomalies from lava at the bottom of the S1 and C craters (central part of crater terrace) and craters N1 and N2. A small lava flow from S1 was also visible, and a small hornito (h1) had formed just outside the crater.
A second hornito (h2) had formed on the south flank of N2.



A series of major explosive and landslide events began at 1017 on 16 November and lasted for four minutes (based on the seismic signals). Explosions produced a dense ash cloud that rose 1 km, and within minutes caused ash and lapilli to fall in the town of Stromboli, about 2 km away on the NE coast of the island. A pyroclastic flow rapidly descended the Sciara del Fuoco to the NW coastline and expanded 200 m over the sea surface.

Source: Sezione di Catania - Osservatorio Etneo (INGV)
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From: Global Volcanism Program, 2020. Report on Stromboli. In: Mayberry, G (ed.), Weekly Volcanic Activity Report 11 November-17 November 2020. Smithsonian Institution and US Geological Survey.