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Climbing Stromboli volcano: Stromboli provides one of the most remarkable opportunities to watch volcanic eruptions from close: a natural ridge located 150 m above the active vents. A classic and all-time favorite tour by anyone interested in seeing active volcanoes!
Stromboli, a small island north of Sicily, is one of the most active volcanoes in the world and famous for its normally small, but regular explosions throwing out glowing lava from several vents inside its summit crater. This activity has been going on for at least 2000 years, as long as there is written memory of the activity, which Stromboli lended its name to, the so-called strombolian activity.
Strombolian acttivity at the summit vents of Stromboli (INGV)
Lava effusion seems to have stopped completely since about a week ago. Small strombolian explosions continue to occur sporadically from vents in the northern and central crater terrace at the summit. ...more
The apparent low activity may be the "calm before the storm": a surge in CO2 gas emissions since the beginning of November indicates that fresh magma might be on the rise within the conduit (CO2 being the least soluble magmatic gas and the first to leave the new magma). One possibility is that the arrival of new magma leads to a strong initial (and very dangerous) explosion. This scenario occurred in 2003 and 2007 during similar stages of activity (after the end of a sustained lava flow).
Occasional mild strombolian explosions occur from the summit vents. Very weak lava effusion also continues, at least intermittently from the vent at 650 m elevation. (Source: INGV Catania latest report)
Thermal image of the upper Sciara del Fuoco of Stromboli
The effusive eruption that had started on 7 August seems to be ending: the lava flow emitted from the 650 m vent at the eastern base of the summit crater complex has decreased a lot two days ago and seems to have almost (or completely) stopped by today. ...more
INGV Catania reports strong degassing from the summit vents. [less]
Lava flows on Stromboli last evening (photo: Ferruccio Ferrari)
No major changes have occurred at the volcano: Lava effusion continues from the 650 m vent and feeds active lava flows on the upper Sciara del Fuoco. From the lava flow fronts, incandescent blocks detach and roll down the slope. ...more
Tremor has decreased to the lowest values measured during the past months and strombolian activity at the summit craters has almost disappeared. [less]
There are signs that the lava flow eruption could be approaching an end soon. Lava effusion rate has dropped although a weak lava flow continues to be active on the upper part of the Sciara del Fuoco. ...more
INGV Catania reports strong degassing and that ash emissions from the summit vents have decreased. [less]
Lava flows on Stromboli's Sciara del Fuoco last evening
Lava continues to flow from the effusive vent under the NE crater and forms several active branches on the upper Sciara del Fuoco. ...more
When observed last evening, the most advanced flow fronts were at 500-550 m elevation. Near-constant glowing rockfalls detach from the lava flows, sometimes reaching the lower parts of the Sciara. Occasional ash emissions, sometimes with audible detonations occurred from the western vent at the summit craters. [less]
Lava flow on Stromboli's Sciara del Fuoco this evening (INGV webcam)
Yesterday's lava overflow has established a new channel for the ongoing lava flow now along the upper northern part of Sciara del Fuoco, closer to the escarpment and more visible from the 400 m webcam. The previously active flow in the central part of the Sciara is now inactive.
Continuing lava flow (r) and overflow of lava (l) this morning at Stromboli (INGV 400m Sciara webcam)
The eruptive activity has remains more or less unchanged: the lava flow is still active while sporadic explosive activity continues from the summit vents. As lava output rates from the 650 m vent fluctuate, the front of the lava flow, located in the central part of the Sciara del Fuoco since 6 Sep, advances and retreats in the lower part of the Sciara, sometimes almost reaching the sea. ...more
A short-lived overflow of lava to the northern part of the flat area at approx. 600 m occurred this morning. Heat radiation from the volcano as measured by satellite has been showing a slowly decreasing trend since 22 August, suggesting that the magma discharge rater has been overall declining.
Strombolian eruption today from Stromboli's NW vent (INGV Catania)
Strombolian explosions have returned to the summit vents, although so far, these have been rare and small. At the same time, the effusive eruption with lava flow emission from the vent at 650 m a.s.l. at the northern base of the crater terrace complex continues with little changes. ...more
The lava flow follows the path on the central part of the Sciara and its front reaches 50-100 m above the sea shore. The summit area remains closed for excursions due to the increased risk of a larger landslide and/or a strong sudden explosive eruption. Visitors are allowed to climb to 290 meters only.
View of the active lava flow from the 190 m thermal webcam (INGV Catania)
Lava effusion continues with little changes overall. During the past weeks, the main lava flow has been traveling in the central part of the Sciara where it is mostly hidden from the webcam. ...more
The main flow front almost reached the sea again last night and this morning, but stopped shortly before the shoreline. Beneath the vent at 650 m elevation, occasional overflows occur to feed small secondary flows on the northern upper part. This was visible on the publicly available INGV webcam located at 400 m elevation.
Overflow onto the upper northern part of the Sciara yesterday
The active lava flow front almost reaching the sea during the night and this morning
Thermal image of the upper Sciara del Fuoco of Stromboli this morning
Lava effusion from the 650 m vent at the northern base of the NE crater has dropped strongly or even (almost) stopped during the past days. At the same time, weak explosions and ash emissions have become more frequent from the summit vents. ...more
Whether this is already the end of the effusive eruption that started a month ago (7 Aug) and a return to "normal" activity, i.e. intermittent strombolian explosions at the summit vents, is too early to say. According to INGV Catania, weak effusive activity still continued last evening. [less]
Lava flow on Stromboli's Sciara del Fuoco this evening (INGV webcam)
No significant changes have occurred. The lava flow(s) erupted from the vent at 650 m elevation on the northern base of the crater continue to be active on the upper part of the Sciara del Fuoco only. Compared to previous days, the flow has been weaker today.
The effusive eruption continues with little changes and no signs of ending soon. The effusion rate is fluctuating, but elevated and the vent feeds two flows that travel down the Sciara in two channels. ...more
Weak explosions sometimes occur from the summit vents. Watch the video of the past 12 hours activity:
View onto the upper part of the lava flow early on the 10th of August, showing the trajectory of the lava from the vent down onto and across the plateau before it flows down the Sciara del Fuoco. Only the vent at the origin and the overflow from the plateau are visible from the 400 m webcams.
After fluctuating and unstable effusive activity during the last few days, the vent seems to have once again increased its magma effusion rate and triggered a new pathway for the lava to flow down the upper part of the Sciara del Fuoco. ...more
Whilst on the afternoon of the 23rd of August lava was still flowing down from the plateau in much the same location as it had done since opening of the vent on the 7th of August, the overflow of lava from the ca 600 m plateau onto the Sciara del Fuoco had substantially decreased by the early hours of the 24th of August. As the hours passed by, the old lava flow dried up and started to cool down despite the fact that effusion from the vent at ca. 650 m seemed to continue. By midday of the 24th, the volume of lava issuing from the vent had even increased - as shown by the thermal webcam image which indicated two, instead of one, branches. Video:
Evolution of the lava flow's effusion rate and channels down the upper part of the Sciara del Fuoco over the last 2 days
Thermal image of the upper Sciara del Fuoco of Stromboli
The lava flow continues to be active, but the effusion rate has been more and more unstable and fluctuates a lot. This results in lava flows taking different (often overlapping) paths on the upper portion of the Sciara del Fuoco. ...more
Decreasing effusion rate this afternoon lets the channels almost "fall dry"
Lava continues to flow from the fissure vent at the base of the NE crater. Compared to the first week, the effusion rate has become more unstable, causing several surges and intervals of strongly decreasing activity. ...more
The fluctuating rate of effusion has also caused the formation of several overlapping new lava channels in the upper area of the Sciara. Two such surges occurred yesterday and today. This can be seen in the time-lapse video below: [less]
Lava flow on Stromboli this evening (INGV Sciara del Fuoco webcam)
The eruption continues with no significant change, but lava effusion seems to have increased. Several secondary active branches formed on the upper part of the new lava flow field and are visible on webcam images.
Stromboli's lava flow from the effusive vent at the NE base of the partially collapsed NE crater
The lava flow continues to be well alimented with little variation visible. It forms an active stream on most of the Sciara, but its flow front during the past days only occasionally reached the sea, and rather accumulated to thicken the lava delta at the NE base of the Sciara.
The lava effusion continues at decreasing, but still considerable rate. When seen yesterday evening, only one channel, 5-10 m wide was still entering the sea at 10 m wide front, while there had been up to 7 branches reaching the shore in the area west of or partially covering the 2007 lava delta. Small explosions were occurring at the sea entry. ...more
Several lava branches were still weakly active on the upper Sciara, causing many incandescent rockfalls. It appears that a part of the NE flank of the NE crater has collapsed and that the new effusive vent is located at its northern base, at approx. 700 m elevation. Thus, being lower than the summit vents, it is able to effectively drain the upper part of the volcano's plumbing system, which explains why no explosions were observed at the summit craters. [less]
A major event has taken place about half an hour ago. It seems - judging from available webcam imagery - that a new vent opened at the NE base of the crater and/or a significant part of the crater terrace might have collapsed and left space for a larger lava flow descending the Sciara. Videos (time-lapse from INGV's webcam on Sciara del Fuoco, thermal and visible):
Thermal image of the same area immediately before, showing the cooling flow from last night
Seismic signal this morning, showing the collapse and onset of the new lava flow from 05:15 (STR8 station, INGV)
According to the local mountain guides and visitors, explosive activity at Stromboli is currently at elevated levels. Several vents in the crater terrace produce strong and frequent strombolian explosions. ...more
Access to the summit area is frequently closed, but for those visiting the island at the moment, good viewpoints are also found along the Sciara del Fuoco up to 400 m elevation (permitted limit). [less]
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