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Plus d'info sur l'Etna...

 

Volcan Etna - actualités

Etna volcano update: Earthquake swarms under eastern and western flanks

Monday May 28, 2018 16:47 PM | AUTEUR : T

Recent earthquakes under Etna volcano
Recent earthquakes under Etna volcano
Depth vs time of recent quakes
Depth vs time of recent quakes
Bocca Nuova on 25 May 2018
Bocca Nuova on 25 May 2018
The volcano is becoming increasingly restless. Two earthquake swarms have occurred during the past days:
The first was at medium depths (mostly 10-30 km) beneath the eastern flank during 24-26 May, the second one started yesterday and is still continuing under the western flank at depths around 5-10 km. Both could indicate an intrusion of magma, and tremor levels are slightly elevated. Whether this heralds a new eruption in the near future (days, weeks?) is matter of speculation. So far, the quakes have been relatively weak.

When we visited Bocca Nuova last Saturday, we noticed relatively strong, pulsating gas emissions from not-very-deep seated explosions inside the main western vent. According to the mountain guides, this activity had increased, as well as degassing from some areas at the southern rim of the central crater as well as the NE crater.
Actualités précédentes
Small ash emission from the SE crater
Thursday, Sep 21, 2017
Since last Monday the SE crater is showing small signs of activity again. During last nights weak sporadic glowes were seen from the depression on the eastern slope of the crater and starting this morning small ash emissions are occurring intermittently from the top of the crater. ... [details]
Steam ring blown from Etna's Voragine crater this morning (image:Radiostudio7 webcam)
Friday, Jul 14, 2017
The volcano remains restless although no one knows what will come next. After a few weeks of "total silence", tiny ash emissions started again to occur from the SE crater since 9 July, volcanologist Dr Boris Behncke total reported on facebook. This activity, which could represent small but deep-seated explosive activity inside the SE crater's conduits, has been continuing over the past days, with a slight increase yesterday (see video below). ... [details]
Ash puff from Etna's SE crater this morning (image: RadioStudio7)
Monday, Jun 26, 2017
After a period of calm during the past weeks, the SE crater started again to show signs of unrest. Since yesterday morning, small to moderate ash emissions have been occurring intermittently from the summit vent of the SE crater complex. ... [details]

Friday, May 19, 2017
We have several free spaces for (hiking) tours to the summit area of Etna in small groups (max 8 persons) on 16 and 17 June. The excursions are accompanied by a certified mountain guide and a volcanologist from our team (Dr. Tom Pfeiffer) and will aim to approach volcanic activity if present and the most interesting volcanic features. ... [details]
Strombolian activity at the SE crater's saddle vent and the peaks of tremor accompanying each short-lived episode (image: Boris Behncke / INGV Catania)
Friday, May 19, 2017
Since 11 May, Etna has been in an unusual state of activity. At remarkably regular intervals of approx. 8 hours, the "saddle vent", located between Etna's old and new Southeast Crater, has been producing more than 20 brief episodes of mild strombolian activity, each accompanied by a short-lived increase in volcanic tremor amplitude. The episodes are further characterized by the absence of strong degassing. ... [details]
 

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