La Soufrière Update #56 – Explosive Eruptions May Continue For Next Few Days To Weeks

Fort Charlotte as La Soufrière erupts on April 9th, 2021 causing scenes of onlookers to marvel. (Stephan Hornsey)

Present La Soufrière Alert Level:YELLOWThe La Soufrière Volcano is restless. Seismicity and/or fumarolic activity are above the historical level at the volcano, or other unusual activity has been observed. This unusual activity will be specified at the time that the alert level is raised. This is level two of four.

The National Emergency Management Organization (NEMO), in their 56th update at 5:00 PM 10th April 2021, advised that La Soufrière has entered an explosive eruptive phase that may continue over the next few days to weeks. Explosions are expected to be of similar or larger magnitude.

The seismic tremor generated by the voluminous energetic venting of La Soufrière Volcano continued overnight. The amplitude of the tremor peaked between 8:00 PM and 12:00 AM on 9th April and slowly declined over the next few hours. There were some periods of increased amplitude during the decline, associated with pulses in the ash venting.

A small number of volcano-tectonic, long-period, and hybrid earthquakes were recorded during the tremor. Audible rumblings accompanied by ash venting occurred throughout most of the night with ashfall reported throughout the island.

Seventy-eight shelters with more than 3000 occupants are now fully operational. Other evacuees have sought shelter with family and friends.

The National Emergency Operating Center (NEOC) has been fully activated and is operating around the clock. NEMO will continue to provide updates as the situation evolves.

Official information will originate from St. Vincent and the Grenadines National Emergency Management Organization and the University of the West Indies Seismic Research Center.

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