Report on Stromboli (Italy) — 9 May-15 May 2018
Smithsonian / US Geological Survey Weekly Volcanic Activity Report, 9 May-15 May 2018
Managing Editor: Sally Kuhn Sennert
Please cite this report as:
Global Volcanism Program, 2018. Report on Stromboli (Italy). In: Sennert, S K (ed.), Weekly Volcanic Activity Report, 9 May-15 May 2018. Smithsonian Institution and US Geological Survey.
38.789°N, 15.213°E; summit elev. 924 m
All times are local (unless otherwise noted)
INGV reported typical activity at Stromboli from 7 to 13 May, with 2-4 hourly low-intensity explosions to heights of less than 80 m (300 ft) above the crater, in the North crater area. Fine ash as well as lapilli and bombs were ejected. The South Central crater area vents produced between 5-12 hourly, low-intensity explosions, also to heights of less than 80 m above the crater. Continuous degassing was also observed from these vents. On 13 May there was an increased frequency of explosions, with 16 events/hour. No significant variations were reported in seismological, deformation, or geochemical parameters.
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 took place between about 13,000 and 5,000 years ago. The active summit vents are located at the head of the Sciara del Fuoco, a prominent horseshoe-shaped scarp formed about 5,000 years ago due to 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.