La Soufriere SCIENTIFIC UPDATE - 12/04/21 6:00PM
1. The pattern of seismic activity changed again, with the end of
the episodes of high-amplitude tremor 2-8 hours apart.
2. Three episodes of tremor have been recorded since 6am, two of
them lower-amplitude and the third, at about 5pm, was high-
3. The episodes continue to coincide with periods of enhanced
venting or explosive activity
4. A reconnaissance of the entire north coast of St. Vincent from
Chateaubelair to Georgetown with assistance from the Coast
5. Observations made indicate that pyroclastic density currents
(PDCs) had descended several valleys on the southern and
western flanks of the volcano and had reached the sea at Morne
Ronde, Larikai and Trois Loupes Bay.
6. Extensive damage to vegetation was noted in an area extending
from Larikai Bay to Turner Bay on the west coast.
7. No other areas along the coast had been affected by PDCs but
villages located on the eastern flank of the volcano had been
affected by heavy ashfall.
8. Explosions and accompanying ashfall, of similar or larger
magnitude, are likely to continue to occur over the next few days
with the chance of PDCs occurring.
9. Visit the International Volcanic Hazard Health Network for
volcanic ash information resources: www.ivhhn.org/information10