La Soufriere, St. Vincent SCIENTIFIC UPDATE – 14/04/21 6:00AM
1. Seismic activity at La Soufrière, St Vincent showed a similar pattern to yesterday.
2. Small long-period earthquakes continued to gradually increase in number after the explosive activity at 6:30am on 13 April.
3. These continued until another episode of explosive activity started at 8:30 pm on 14 April.
4. This generated continuous seismic tremor which lasted for four to five hours.
5. After the tremor had died down, small, long-period earthquakes were again recorded, again slowly growing
6. The explosions which occurred pulsed for >40 minutes and produced pyroclastic density currents (PDCs) which, appear to have gone down valleys that drain towards the Rabacca River on the east coast of the island.
7. PDCs are hot (200°C-700°C), ground-hugging flows of ash and debris.
8. Lahars (mudflows) were reported in the Sandy Bay Area on 13 April.
9. The volcano continues to erupt explosively and has now begun to generate pyroclastic density currents.
10. Its current pattern of explosions appears to be episodic (stop-and-go).
11. Over the past 24 hours the time between each explosion has increased.
12. Explosions and accompanying ashfall, of similar or larger magnitude, are likely to continue to occur over the next few days impacting St. Vincent and neighbouring islands such as Barbados, Grenada, Saint Lucia.
13. The volcano is at alert level Red
14. Visit the International Volcanic Hazard Health Network for volcanic ash information resources: www.ivhhn.org/information
#LaSoufrière #svg #uwi #redalert #monitoring #volcano #stilldangerous
NEMO St. Vincent and the Grenadines
Department of Emergency Management
NEMO Saint Lucia
CDEMA – Caribbean Disaster Emergency Management Agency