Stromboli volcano (Italy), activity update: strong activity continues
Stromboli volcano's crater terrace with 7 of the 9 active vents visible: from left to right, a tall eruption from the NW crater, 2 visible glowing vents in the central crater, the spattering NE cone of the central crater with its smaller flank vent, and two vents (one erupting weakly) of the NE crater. (Photo taken early on 25 June)
During the past weeks and months, Stromboli has continued to show extraordinarily high activity as several groups of VolcanoDiscovery have observed.
During a visit on 24 June, 9 active vents were counted: two active vents in the NW crater (towards Ginostra), one of which exploded with tremendous noise every 20-30 minutes, throwing powerful jets of burning gas followed by large amounts of spatter to heights of up to 3-400 m, showering the OUTER rims of the crater terrace. A neighboring vent, a few meters away from it, is normally not visible, but when it erupted, it had the appearance of the ground opening and emitting glowing ash that slowy rose, blackened and created small ash plumes.
In the central crater, 4 visible glowing vents and one hidden behind the wall were active, the most prominent being the tall cone in the NE corner of the complex. The NE cone was spattering constantly, throwing spatter to considerable 50-100 m height. This activity was interupted every 5-10 minutes by strong, hissing fountains lasting up to 20 seconds, and thowing incandescent material to up to about 250 height. At times, the force of the fountain activated a second vent next to it, on the SE side of the cone, apparently serving as an additional valve whenever the output rate during the fountains from the cone itself becomes too large. Two other vents in the central crater complex were large, constantly glowing holes, but showed only occasional weak spattering and erupted only rarely strombolian bursts of spatter to 100-150 m height. A fith vent is not visible from Pizzo, but on a visit on 15 June, it was observed to erupt spatter occasionally to about 100 m height (about once per hour).On 25 of June, it was not erupting.
Last, there were two active vents in the NE crater (towards the village of Stromboli), one of which erupts spectacularly about every 20-30 minutes, throwing lots of incandescent bombs towards the E, showering the outer crater slope with bombs. These eruptions also produced dense ash clouds.
A first set of photos taken by Marco Fulle during our tour from 20-28 May are online at Stromboli Online here.
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