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 - 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.
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.