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Earth of fire

Actualité volcanique, Article de fond sur étude de volcan, tectonique, récits et photos de voyage

Publié le par Bernard Duyck
Publié dans : #Actualités volcaniques
 Etna - release of ashes at the SEC on the morning of 3 March - photo Boris Behncke

Etna - release of ashes at the SEC on the morning of 3 March - photo Boris Behncke

After its first eruption in 2017, the Etna's tremor declined sharply, but did not regain its basal level.
On 3 March, sporadic emissions of ash accompanied by some incandescent pyroclastic material were observed.
The new Nicolosicura site provides a "yellow" alert level and an "Attention" operational phase.
 
Source: INGV Catania & Nicolosicura.

Etna - tremor and its lower level in two levels - doc. INGV Catania 04.03.2017 / 8h42

Etna - tremor and its lower level in two levels - doc. INGV Catania 04.03.2017 / 8h42

Etna - the lava front filmed by Salvo Longo, alpine and volcanological guide

In Bogoslof, no explosive eruptions have been recorded since 19 February. Despite this apparent calm, the fact that the vent remains below water level suggests that in the event of a new eruption, its characteristics could be similar to those observed in the previous two months.
Seismic breakdowns on Umnak Island have reduced the AVO's seismic monitoring capabilities and a rapid characterization of volcano activity. It will be the seismic data from Unalaska that will detect any new activity.
The main changes are related to the marine erosion of the Bogoslof outer coastline. The differences in area between the images of 12 and 23 February are not significant and probably related to the level of the tides.


Source: AVO

Bogoslof - morphological changes between 12 and 23 February 2017 - Doc. Chris Waythomas / AVO

Bogoslof - morphological changes between 12 and 23 February 2017 - Doc. Chris Waythomas / AVO

In Fuego, where the activity is mainly fumarollian, interspersed with a few explosions, the volcano remains invisible due to the remobilization of the ashes by the strong winds.


Source: Insivumeh

Fuego - 03.03.2017 / 15h34 - strong winds move large clouds of ash - photo webcam Insivumeh

Fuego - 03.03.2017 / 15h34 - strong winds move large clouds of ash - photo webcam Insivumeh

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