The National Institute of Geophysics and Volcanology, Etna Observatory, reports that a new increase in Strombolian activity is observed at the SE crater on March 23, 2021 at around 8:32 p.m. UTC.
At around 10 p.m. UTC, a lava fountain is underway at SE Crater. According to the forecast model, the eruptive cloud produced by the current activity if it is dispersed towards the southwest ... on the way to the 16th paroxysm !
At 02:37 GMT a pyroclastic flow was also used for the INGV-OE surveillance cameras, even confirmed for the INGV staff present on the scene. The flow is oriented towards the Bove valley reaching about 2900 m in height.
On the seismic level, the increase in the magnitude of the volcanic tremor on very high values continues.
From 02:30 UTC, the average amplitude of the volcanic tremor is decreasing, while still remaining on high values.
Two flows were generated by the activity, one well fed towards the Bove Valley which reached around 1900 to 1800 m, and another less fed towards the south which settled in the summit area.
The INGV announced at 5:43 am UTC that according to the forecast model, the eruptive cloud produced by the current activity if it is dispersed towards the south-east. The maximum height estimated by satellite east of 6000 m at sea level. It was also reported by staff INGV-OE to relapse of ash in Catania.
Sources: INGV OE, INGV webcams and Etna Live video
In the Reykjanes Peninsula, a new, smaller fissure opened better on the side of the main crater during the eruption of Geldingadalur at Fagradalsfjall, where a large amount of dense lava flows. In recent days, most of the activity has taken place in the main crater, but now it's highly visible in both places.
A new, smaller crack opened on the side of the main crater during the Geldingadalur eruption - photo 23.03.2021 / mbls
The southwest wind eased today making the air quality unhealthy near the eruption site after 7:00 p.m. on March 23, 2021.
The concentration of SO2 near the volcano can exceed 9000 µg / m3, and be higher in the valleys, like that of CO2. IMO and the Suðurnes police chief advise to leave the area before 5:00 p.m. and get away from the valleys.
A strong SO2 plume is detected by Sentinel-5P / Tropomi, drifting towards Reykjavik and the northeast (Tropomi via Simon Carn)
Iceland - eruption in Reykjanes Peninsula emits strong plume of SO2 - image Sentnel-5P tropomi 03/23.2021 / 2:17 p.m. / BIRA / DLR / ESA via S. Carn
Sources: IMO, RUV, mbls
To read: Characterization of rock samples collected on the 1st and 2nd days of the eruption - major elements and mineral chemistry / Univ. Of Iceland