1. Seismic activity continued the pattern established after the explosive activity on 18 April.
2. Small long-period and hybrid earthquakes continued to be recorded, with their rate of occurrence increasing gradually over the last 24 hours.
3. The network also recorded a few rockfalls and volcano-tectonic earthquakes.
4. No seismic tremor has been recorded in the last 24 hours.
5. Since the initial depressurization* noted immediately following the April 9 explosive phase, the continuous GPS network has recorded a decrease in the overall rates of horizontal and vertical movement.
6. 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.
7. Explosions with accompanying ashfall, of similar or larger magnitude, can occur with little or no warning.
8. Visit the International Volcanic Hazard Health Network for information and resources on living with volcanic ash:
*Depressurization – a decrease in pressure within a volcano caused by the release of magma, gases or fluids during an explosive event.
Photo caption: Seismicity plot as of the morning of 21/04/2021
Photo credit: Roderick Stewart, MVO/UWI-SRC
NEMO St. Vincent and the Grenadines
NEMO Saint Lucia
API – The Agency For Public Information : St. Vincent and the Grenadines
Department of Emergency Management
CDEMA – Caribbean Disaster Emergency Management Agency
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