Etna volcano - eruption update
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Activity ceases at New SE crater
Update Sun 17 Aug 17:20
Intense strombolian activity and lava flows from New SE crater
Update Wed 13 Aug 19:17
Whether Etna is heading towards a true paroxysm with lava fountains is unclear, but if the new phase of activity is similar to the previous episodes, it might continue the same type of activity at fluctuating levels for a while and then fade.
The lava flow's main branch, issued from a fissure vent at the upper eastern rim of the NSEC, is headed to the northeast and has now a length of approx. 2 km. Its wide active front has reached the base of the Valle del Bove. Two secondary arms divide from the main flow and are flowing more to the east towards the break in slope into the Valle del Bove east of the NSEC (s. thermal image).
This new activity at the New SE crater had started on 9 August and gradually intensified until Monday, then dropped a bit and has been stagnating since.
Along with the appearance of lava at the NSEC, the explosive-effusive activity from the vents at the eastern base of the NE crater, which had continued through the past weeks, gradually waned and ceased on 10 or 11 Aug.
Update Wed 06 Aug 14:50Decreasing tremor and weakening thermal signals suggest that the explosive / effusive activity from the vents at the eastern foot of the NE crater still continues, but at reduced rate. At least one lava flow seems to be still active.
Continuing strombolian activity and lava flows
Update Mon 04 Aug 17:18
A small collapse occurred on 1 August, partially destroying the cone that had been built above the 25 July vent.
Tremor reflecting the explosive activity there remains elevated, with strong fluctuations, but an overall decreasing trend.
The following video by Boris Behncke shows the activity on 2 August:
Opening of a new vent at E base of North-East Crater
Update Sat 26 Jul 00:41A new vent opened yesterday morning at 11:14 local time.
It is located about 150-200 metres north of the two previous vents at the eastern base of the NE crater.
Its activity is characterized by small strombolian explosions while a lava flow continues to be weakly alimented from one of the two other vents
In the meantime sporadic emissions of hot gas sometimes associated with ash emissions continue from the New SE crater .
Update Tue 15 Jul 20:39
Continuing lava flows, growing spatter cones
Update Mon 14 Jul 16:25
2 spatter cones have been growing at the vents. They have been called "hornitos", although this term strictly spoken refers to smaller chimney-like structures that can form on top of skylights above lava tubes, where degassing jets throw out small amounts of lava to pile up to form them.
Starting from around 7 July, the lava flow has formed a second branch further to the north. Its furthest flow front has reached a length of approx. 1.5 km.
Tremor remains stable at slightly elevated levels.
Update Tue 08 Jul 07:18no significant changes: lava continues to effuse from the new fissure vent at the eastern base of the NE crater. A small hornito has grown at the vent. Tremor continues to climb slowly. Emanuela visited the active lava flows yesterday:
Continuing lava flows from new fissure.
Update Mon 07 Jul 18:26The lava flow continues to advance slowly from the new fissure vent into the Valle del Leone. Tremor has been rising gradually overall, but is still low.
The following time-lapse from 14:00 local time Saturday until now shows the arrival of the new dike causing the new fissure vent to open and the advance of the lava flow:
New effusive vent at E base of North-East Crater
Update Sun 06 Jul 11:38A new effusive vent opened yesterday afternoon on the eastern base of the North-East crater feeding a small lava flow.
Weak activity continues at the New SE crater
Update Wed 02 Jul 14:45Occasional weak explosions continue at the New SE crater. The volcanic tremor signal is still low.
Update Thu 19 Jun 09:18The latest eruptive episode at the New SE crater, which again grew a few meters during this time, is now over. The lava flow is no longer active and there are no (or only very weak and sporadic) explosions at the crater itself. Tremor has descended back to low levels.
Update Wed 18 Jun 17:43Civil protection reacts "fast": access has now been limited to 2500 m.
Update Wed 18 Jun 16:21Activity and tremor have further decreased - it seems that the latest eruptive (explosive-effusive) phase at the New SE crater is coming to an end.
A series of photos taken during 15-16 June has been posted here.
Update Wed 18 Jun 17:41This morning, weak strombolian activity and lava effusion were still going on. Marco Fulle who is still on location took this picture of the scene complete with a rare steam ring.
Update Tue 17 Jun 07:59
Lava flows continued to descend through the channel on the eastern side of the cone and spread into several channels on the upper half of the Valle del Bove wall, but not extending beyond the fronts emplaced during yesterday night.
The situation this morning is similar, but the spattering at the summit has decreased.
Lava flows into Valle del Bove
Update Mon 16 Jun 15:49Lava effusion and pulsating low lava fountains continued from the New SE crater throughout the night and today. Tremor remains at fluctuating elevated levels but with a now slightly decreasing trend. The lava flows have descended the western slope into the Valle del Bove where they spread into several broad fronts.
Paroxysm from New SE crater ?
Update Sun 15 Jun 16:52
At the moment, tremor is currently stagnating, and it is not clear whether it will culminate in a true paroxysm (phase of lava fountaining).
Near-continuous explosions from the several vents at the summit of the NSEC occur in rapid succession and eject glowing spatter to heights of 100-200 m during in what could be described as pulsating lava fountains. A vent at the eastern part of the summit occasionally ejects dark jets of ash and brown ash plumes rise from time to time from the northeastern rim of the crater, presumably from collapse events.
Unfortunately, heavy cloud cover , approx. 10 cm of fresh hail and thunderstorm activity prevented detailed observations during most of the early afternoon.
Starting from early this morning, several lava flow headed slowly towards the Valle del Bove rim started to descend from the summit through the valley on the SE side of the crater.
Update Fri 13 Jun 21:53
Activity continues at the New SE crater
Update Tue 10 Jun 13:14Mild strombolian activity is still continuing at the New SE crater.
A short sequence of more energetic seismo-volcanic events occurred this morning most probably at Bocca Nuova crater.
It wasn't visible on webcams but only on the seismic signal.
Tremor is currently low.
Ash emissions from the New SE crater and partial collapse on its eastern flank
Update Sun 08 Jun 17:57Glow and ash emissions continue to be observed at the summit vent of the New SE crater. The intensity of this still weak activity slowly increased this morning with 5-10 small explosions per hour.
A small event this afternoon at 13:42 (local time) from the New SE crater produced a reddish-brown ash plume generated by partial collapse on the upper part of the eastern flank of the cone.
Continuing mild strombolian activity at NSEC
Update Sat 07 Jun 09:25
Update Sun 01 Jun 11:40
Ash emissions from Bocca Nuova and intermittent strombolian activity at New SE crater
Update Sat 31 May 10:16
Video from this night's activity:
Update Tue 27 May 17:21
Update Mon 12 May 00:54Near-continuous weak strombolian activity is visible from the New SE crater. Tremor is currently low.
Update Mon 05 May 22:55Sporadic small explosions continue at the New SE crater sometimes with pyroclastic material ejected outside the crater.
In April the seismic tremor was characterized by regular cyclic increases of amplitude forming evident stripes on seismograms. This phenomenon called "banded tremor" gradually became less evident and seems ended on 2 May coincident with a strong seismo-volcanic event occurred most probably at the Bocca Nuova crater.
Update Fri 02 May 23:17
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