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LA SOUFRIÈRE BULLETIN #74 APRIL 21, 2021 6:00 PM

LA SOUFRIÈRE BULLETIN #74 APRIL 21, 2021 6:00 PM 

 

  1. Seismic activity at La Soufrière Volcano continued the pattern established after the explosive activity on April 18.

 

  1. Small long-period and hybrid earthquakes continued to be recorded, with their rate of occurrence increasing gradually over the last 24 hours. The network also recorded a few rockfalls and volcano-tectonic earthquakes.

 

  1. No seismic tremor has been recorded in the last 24 hours.

 

  1. 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.

 

  1. 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.

 

  1. Explosions with accompanying ashfall, of similar or larger magnitude, can occur with little or no warning.

  

 

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Volcanic Hazard Zones