Report on Stromboli (Italy) — 23 January-29 January 2013
Smithsonian / US Geological Survey Weekly Volcanic Activity Report, 23 January-29 January 2013
Managing Editor: Sally Kuhn Sennert
Please cite this report as:
Global Volcanism Program, 2013. Report on Stromboli (Italy). In: Sennert, S K (ed.), Weekly Volcanic Activity Report, 23 January-29 January 2013. Smithsonian Institution and US Geological Survey.
38.789°N, 15.213°E; summit elev. 924 m
All times are local (unless otherwise noted)
On 15 January Sezione di Catania - Osservatorio Etneo reported that overflowing lava from vents lying just below the rim of the northernmost explosive vent on Stromboli's crater terrace generated small lava flows that traveled down the N and NW sectors of the Sciara del Fuoco. Landslides caused by the sliding and rolling of loose rock material on the steep slope of the Sciara del Fuoco sometimes accompanied the lava flows. At night during 15-16 January, effusive activity ceased, then only very small lava overflows were observed on the evening of 17 January and during the night of 19-20 January.
Geologic Background. Spectacular incandescent nighttime explosions at this volcano have long attracted visitors to the "Lighthouse of the Mediterranean." Stromboli, the NE-most of the Aeolian Islands, has lent its name to the frequent mild explosive activity that has characterized its eruptions throughout much of historical time. The small island is the emergent summit of a volcano that grew in two main eruptive cycles, the last of which formed the western portion of the island. The Neostromboli eruptive period from about 13,000 to 5000 years ago was followed by formation of the modern edifice. The active summit vents are located at the head of the Sciara del Fuoco, a prominent horseshoe-shaped scarp formed about 5000 years ago as a result of the most recent of a series of slope failures that extend to below sea level. The modern volcano has been constructed within this scarp, which funnels pyroclastic ejecta and lava flows to the NW. Essentially continuous mild strombolian explosions, sometimes accompanied by lava flows, have been recorded for more than a millennium.