La Soufriere St Vincent SCIENTIFIC UPDATE – 19/04/21 6PM

The volcano continues to erupt. Its pattern of seismic activity over the last few days is typical of the growth and destruction of lava domes

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View of La Soufriere volcano from Belmont Observatory. Photo: Roderick Stewart, UWI-SRC/MVO
1. Seismic activity at La Soufrière continued the pattern established after the explosive activity yesterday evening.
 
2. Small long-period and hybrid earthquakes continued to be recorded. No volcano-tectonic earthquakes, rockfalls or tremor have been recorded in the last 12 hours.

3. The continuous GPS network has shown a change in horizontal and vertical movement since the initial depressurization noted immediately following the April 9 explosive phase.

4. The continuous GPS (Global Positioning System) network is used to track changes in ground shape on and around the volcano. As magma moves beneath the volcano, changes in pressure cause the volcano to change shape (inflate/deflate).

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5. The volcano continues to erupt. Its pattern of seismic activity over the last few days is typical of the growth and destruction of lava domes.

6. Explosions with accompanying ashfall, of similar or larger magnitude, can occur with little or no warning impacting St. Vincent and neighbouring islands.

7. The volcano is at alert level Red

8. Visit thttps://volcanoes.usgs.gov/volcanic_ash/resources.html for Global Ash Impact posters. These are the latest research-informed material for concise best practice information for critical infrastructure managers to effectively manage ash-producing volcanic eruptions.

9. Visit the International Volcanic Hazard Health Network for volcanic ash information and resources:
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