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Multidisciplinary study of flank instability phenomena at Stromboli volcano, Italy
Author(s) -
Falsaperla S.,
Neri M.,
Pecora E.,
Spampinato S.
Publication year - 2006
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1029/2006gl025940
Subject(s) - geology , lava , fault scarp , volcano , impact crater , seismology , landslide , rockfall , strombolian eruption , volcanic cone , lava dome , geomorphology , caldera , fault (geology) , astrobiology , physics
This study concerns the unstable scarp named Sciara del Fuoco (SDF) at Stromboli volcano, merging geo‐structural observations, live‐cam records in the visible and IR bands, analysis of vertical aerial photographs, and seismic records. These are used to assess morpho‐structural changes between 2002 and 2004. The onset of the lava effusion on 28 December, 2002 preceded a gravitational collapse by two days, affecting a wide area of the SDF above and below sea level. We surmise that the collapse enhanced latent instability of the scarp. The 2002–2003 lava flows had a remarkable stabilizing effect on wide portions (>50%) of the SDF, whilst erosive phenomena continued in the zone not covered by lava. This caused unrelenting regression of the upper landslide scarp toward the summit craters in the form of rockfalls and debris flows. If the crater conduit were involved in the sliding, then a change in eruptive behavior cannot be excluded.