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Plus d'info sur l'Etna...

 

Volcan Etna - actualités

Etna volcano (Italy): activity update - strombolian activity from several summit vents

mardi oct. 02, 2018 22:30 | AUTEUR : T

Ash emission from Etna's NE crater on 30 Sep 2018 (image: Emanuela Carone / VolcanoDiscovery Italia)
Ash emission from Etna's NE crater on 30 Sep 2018 (image: Emanuela Carone / VolcanoDiscovery Italia)
Map of Etna's summit craters at present (image: INGV)
Map of Etna's summit craters at present (image: INGV)
Strombolian eruption in Bocca Nuova on 30 Sep 2018 (image: Emanuela Carone / VolcanoDiscovery Italia)
Strombolian eruption in Bocca Nuova on 30 Sep 2018 (image: Emanuela Carone / VolcanoDiscovery Italia)
A new vent with strong degassing opened in Bocca Nuova a few days ago, discovered on 30 Sep via our guide's infrared camera (image: Emanuela Carone / VolcanoDiscovery Italia)
A new vent with strong degassing opened in Bocca Nuova a few days ago, discovered on 30 Sep via our guide's infrared camera (image: Emanuela Carone / VolcanoDiscovery Italia)
Recent earthquakes under Etna's eastern flank
Recent earthquakes under Etna's eastern flank
Over the past few weeks, Etna has been showing mild, sporadic strombolian activity from 5 of the summit vents: 3 vents inside Bocca Nuova (two in the northwestern and one in its southeastern pits), the NE crater and less frequently from the New SE crater.
The ejection of incandescent bombs rarely reach above and beyond the rims of both Bocca Nuova and NE crater. More or less intense ash emissions, in particular from the NE crater, accompany the activity.
The vent in the upper eastern wall of Voragine (which had formed on 7 Aug 2016) showed a marked increase in degassing activity during the past week.
As a result of the strombolian activity inside Bocca Nuova, a new intra-crater cinder cone has been growing at the bottom of the western pit. During one of our guided tours to the summit last Sunday (30 Sep), mountain guide Francesco Ciancitto could confirm the opening of a new vent inside Bocca Nuova's western pit just next to the actively erupting one. It showed strong degassing; thus, there are currently 4 active vents in Bocca Nuova alone.

Earthquake activity:
Tremor and degassing levels have been low to average according to the latest weekly bulletin of the volcano observatory (INGV Catania). However, it should be noted that a number of volcano-tectonic earthquakes have affected the middle eastern flank recently. The largest events were two quakes of magnitudes 2.9 and 3.5 at depths around 5 km near the Pernicana fault (which often has acted as an "opener" for the NE rift zone in the past). However, there are no signs currently of an impending larger (rift) eruption.
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Source:
Actualités précédentes
Strombolian Activity from the SE crater  (photo: Emanuela / VolcanoDiscovery Italy)
samedi, août 25, 2018
The strombolian activity from the SE crater which started Thursday evening is progressively decreasing. From time to time weak ash emissions are still observed. The effusive activity has almost stopped. The seismic tremor is still at an elevated level, but it is also showing a decreasing trend. [details]
vendredi, août 24, 2018
Volcanic Ash Advisory Center Toulouse (VAAC) issued the following report: ... [details]
Strombolian activity from Etna's SE crater last night (LAVE webcam)
vendredi, août 24, 2018
Last night, new activity started at the SE crater. Tremor began to rise sharply at around 20:30 local time, accompanied by mild strombolian activity from the new cone in the saddle between the "old" and "new" SE crater. ... [details]
Satellite image of Etna volcano on 23 Aug 2018
jeudi, août 23, 2018
Volcanic Ash Advisory Center Toulouse (VAAC) issued the following report: ... [details]
Recent earthquakes under Etna volcano
lundi, mai 28, 2018
The volcano is becoming increasingly restless. Two earthquake swarms have occurred during the past days: ... [details]
 

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