Strombolian eruption from the NE vent (21 May 2013)
Jet-like and simultaneous ash-rich eruption from two of the NW vents (21 May 2013)
Explosive activity at Stromboli is currently at normal to moderately high levels, but the magma column has obviously dropped considerably compared to previous weeks, as there are no longer lava overflows. We observed the volcano during the past days and found a total of 8 active vents in the crater terrace, out of which 4 were showing their typical different strombolian activity: ...mehr
In the NW crater area, two adjacient vents often erupted simultaneously. One was ejecting dense jets of incandescent gas, almost no ash and only few incandescent tephra that formed candle-like fountains reaching 100-200 m height, and accompanied by loud jet-engine like noises. The other one erupted silent, dense low ash plumes and glowing material to 50-100 m. Eruptions occurred every 20-30 minutes on average. Two vents in the central crater area were constantly glowing and ejecting pulsating steam puffs, but did not erupt. [less]
Thermal image of the crater area of Stromboli (INGV Catania)
Over the past days, Stromboli has returned to normal levels of activity with frequent, mostly small to medium-sized explosions and low to medium tremor. Small lava overflows and frequent rockfalls still occur.
Seismic signal from Stromboli this morning (STR8 station, INGV)
Current thermal image of the crater area of Stromboli (INGV)
Activity has remained generally elevated and seems to have increased yesterday. Current seismic recordings show strong explosion signals and an increase in tremor. A small lava overflow is currently visible from the NE crater.
Thermal webcam image of the crater area of Stromboli (INGV)
Webcam image of the crater area of Stromboli (INGV)
Lava continues to intermittently flow over and out of vents at the rim and the base of the NE crater. Yesterday, the active flow front had reached about half way down the Sciara, local guides reported. ...mehr
Today, tremor has decreased again a bit, but overflows remain active at least in the upper parts of the slope. Relatively large explosions and near-constant rockfalls on the Sciara continue during the whole time. [less]
Lava overflow on the Sciara del Fuoco (INGV thermal webcam)
Visual webcam image of the crater area (INGV)
After decreasing a bit yesterday, the overflow of lava from the NE vents has gained in strength this morning again, accompanied by constant rockfalls, relatively strong explosions and higher tremor.
Thermal webcam image of the crater area of Stromboli (INGV)
Rockfalls on the Sciara (INGV webcam)
Activity has decreased a bit yesterday, but strong explosions and small lava overflows from the NE crater rim and a vent at the outer flank continued, accompanied by frequent rockfalls on the Sciara. At the moment, activity seems to be increasing again. [alles lesen]
Thermal webcam image of the crater area of Stromboli (INGV)
This morning's seismic signal from Stromboli (ST8 station, INGV)
An increase in activity occurred yesterday. Lava started to effuse from one or two vents at the base of and on the outer flank below the NE hornito. It is currently extending on the upper part of the Sciara and produces strong rockfalls that reach the sea. ...mehr
The seismic signal shows increased tremor and continuous rockfalls on the Sciara, as well as large explosion signals at intervals of approx 15-30 minutes. [less]
Thermal webcam image of the crater area of Stromboli (INGV)
Activity remains elevated, with magma filling the NE crater to the rim and sometimes relatively strong explosions. No significant new overflows have occurred since the last update.
Thermal webcam image of the crater area of Stromboli (INGV)
The small lava flow issuing from the breached NE crater continues, but has not progressed much. Frequent glowing rockfalls descend the Sciara del Fuoco.
Webcam image of the crater area of Stromboli (INGV)
Thermal webcam image of the crater area of Stromboli (INGV)
Magma stands high inside the conduits. A small overflow is occurring from the NE crater. The lava flow reaches about 100 meters length at the moment. Tremor and explosion signals are moderate to elevated. [alles lesen]
Activity remains elevated, but the new lava flow is no longer much alimented at the moment. ...mehr
INGV Catania corrected initial reports in that the lava flow front had actually NOT reached the sea during the night 17-18 April, but only about half way. Most likely, observers had confused glowing blocks detaching from the flow and descending to the sea with an actual coherent lava flow. [less]
Webcam image of the crater area of Stromboli (INGV)
Current seismic signal from Stromboli (ST8 station, INGV)
The lava flow continues to be alimented, but effusion rate has apparently dropped and only the upper portion of the flow seems currently active. The seismic signal shows strong eruption tremor and continuous rockfall signals.
Thermal image of the crater area of Stromboli (INGV Catania)
The activity continued throughout the night and the lava flow has reached the sea at the base of the Sciara del Fuoco. At the moment, the new flow has decreased but remains weakly active and tremor elevated.
The new lava flow on the upper Sciara del Fuoco this evening
Current seismic signal from Stromboli (ST8 station, INGV)
A new larger lava flow from the NE vent has started this afternoon to descend the Sciara del Fuoco, accompanied by glowing rockfalls and strong tremor. The eruption was preceded by very large strombolian explosions during the morning. [alles lesen]
Strombolian eruption from NW crater today (INGV thermal webcam)
Activity has remained more or less unchanged. Explosions, sometimes strong continue from several vents,and small amounts of viscous lava overspills the rims of the NE crater.
Thermal webcam image of the crater area of Stromboli with an eruption from the NW vent (INGV)
Current seismic signal from Stromboli (ST8 station, INGV)
Activity remains elevated. Lava continues to overspill from the lips of the NE crater, showing that the magma column stands high inside the conduit. Frequent strombolian explosions are reaching heights of 2-300 m and the tremor signal is strong again today.
Thermal webcam image of the crater area of Stromboli (INGV)
Yesterday evening's lava flow has once again beeen very short-lived. Activity (effusion rate) sharply dropped late in the evening and today, only very small amounts of lava are still overspilling from the NE crater rim. Tremor and rockfall signals are much weaker as well.
Thermal image of the crater area, showing the new lava flow and a strombolian burst at the New SE crater
The lava flow at night on the webcam
A strong increase of activity occurred this afternoon. A relatively large, sustained lava flow has started to erupt from the breached NE cone and descend the Sciara del Fuoco. The process is accompanied by ongoing strong strombolian eruptions, mainly from the same NE vent, and strong continuous tremor. ...mehr
No significant changes have occurred recently. The seismic signal shows medium tremor levels with phases of medium to high values, and there are frequent (about 10 per hour), sometimes quite powerful strombolian explosions from the various active vents. Small amounts of lava sometimes overspill from the NE vent.
