Eruptive style of Stromboli volcano in 2017-2018
Abstract
The activity of Stromboli is characterized by some hundreds of moderate explosions per day. Less frequently, major explosions occur with ejection of scoria up to hundreds of meters from the craters. Sporadically, an effusive vent may open, with lava flows along the "Sciara del Fuoco" flank (North-West side of the island). In the last decades, during the major effusive eruptions (2002-2003 and 2007), also paroxysmal explosions occurred with the ejection of large ballistic blocks. After moderate activity started in 2014, since 2017 Stromboli has shown an increase in the explosive activity. After the effusive eruption of 2002-2003, the island's monitoring system was improved by the INGV, adding also two Sacks-Evertson borehole volumetric dilatometers. This allowed us to collect a large amount and variety of data that can improve the understanding of Stromboli dynamics. Furthermore, since last year, the occurrence rate of the major explosions increased. In particular, the INGV geophysical monitoring network recorded eight major explosions occurred on July 26, October 23, November 1, December 1, 2017, March 7, March 18, April 24 and April 26, 2018. As a consequence of this period of increased volcanic activity, in December 2017 the alert level was raised from "base" (green) to "attention" (yellow) for a period of about three months. Here we describe the activity of Stromboli in the period 2017-2018, and we discuss the data recorded by the INGV monitoring networks.
- Publication:
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AGU Fall Meeting Abstracts
- Pub Date:
- December 2018
- Bibcode:
- 2018AGUFM.V23K0197G
- Keywords:
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- 0545 Modeling;
- COMPUTATIONAL GEOPHYSICSDE: 7280 Volcano seismology;
- SEISMOLOGYDE: 8428 Explosive volcanism;
- VOLCANOLOGY