Seismological monitoring of the February 2007 effusive eruption of the Stromboli volcano

• Main Authors: G. Scarpato, M. Orazi, W. De Cesare, R. Curciotti, T. Caputo, A. M. Esposito, L. DAuria, F. Giudicepietro, M. Martini, A. Caputo
• Format: Article
• Language: English
• Published: Istituto Nazionale di Geofisica e Vulcanologia (INGV) 2007-06-01
• Series: Annals of Geophysics
• Subjects: Stromboli; volcano monitoring; volcano seismicity
• Online Access: http://www.annalsofgeophysics.eu/index.php/annals/article/view/3056
• ISSN: 1593-5213; 2037-416X

On February 27, 2007, the Stromboli volcano, which has usually been characterized by moderate explosive activity,
 started an effusive eruption with a small lava flow down the NW flank. The permanent broadband network
 installed on the island allowed the revealing of anomalies in the seismicity before the effusive eruption and for
 the phenomena to be followed over time, thus obtaining meaningful information about the eruption dynamics.
 During the effusive phase, a major explosion occurred on March 15, 2007. On that occasion, two strainmeters
 deployed on the volcano in the previous year recorded a strain increment before the blast. After this explosion,
 which further destabilized the upper part of the edifice, swarms of Long-Period (LP) and hybrid events were
 recorded. The characteristics and locations of these events suggest that they were associated with the fracturing
 processes that affected the summit area of the cone. During the effusive phase, changes in the Very Long Period
 (VLP) event location were recorded. This type of events accompanied the change in the eruptive style, providing
 information about the magmatic conduit involved in their seismogenetic processes. The effusive phase
 stopped on April 2, 2007, and the typical Strombolian activity restarted some months later.