La Palma eruption update 3rd december 2021: Limited activity seen from any of the vents today
Today, the eruptive activity is low and varied, relative to recent days. Until the early morning, activity was concentrated in the northeast vent, which showed periods of strong strombolian activity interspersed with shorter periods of no activity from either vent. Numerous active lava streams remained close to the vent, which are predominantly flowing through the main portion of the flow field over existing flows (mostly flow 10). Throughout the day eruptive activity has been low to minimal, with no activity from the northeast cone for much of the day, and occasional ash-rich emission, likely phreatomagmatic in nature, from the main vent.
Other monitoring indicators have also lowered relative to previous days. As of 19:00 local time there have been 43 earthquakes, peaking at M3.4, relative to 98 yesterday and over 300 the two days before then. As with the last few days, the earthquakes are almost exclusively at shallow to intermediate depths (10-15km). Tremor is fluctuating but stays at low-medium levels, and deformation is predominantly stable. However, 6cm of vertical deformation has been recorded at the Jedey station, which is attributed to the feeding of the eruptive process and is very sensitive due to its location according to PEVOLCA.
Access to the evacuated zones by both land and sea has not been allowed today due to poor air quality, although outside this zone good levels of SO2 concentrations are recorded at all stations. PM10 concentration has worsened in Los Llanos de Aridane, exceeding the daily limit value yesterday and remaining unfavourable today. Elsewhere, PM10 levels are reasonably good or good, apart from in La Grama-Breña Alta where they are regular.
Sources: Government of the Canary Islands, PEVOLCA, Involcan, IGN, DSN, Cabildo La Palma, 112 Canarias, Tolouse VAAC, Copernicus EMS
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