Near continuous steam venting from La Soufriere’s crater floor

By Demion McTair. Updated 7:30 p.m., Monday, April 26, 2021, Atlantic Standard Time (GMT-4).

White steam was seen venting near-continuously from several locations on the La Soufriere volcano crater floor.

According to the University of the West Indies Seismic Research Center – UWISRC, the discovery was made when an observation flight took place today (April 26), in a fixed-wing aircraft at about 11:30 a.m.

Visibility was poor, with clouds blocking the crater for much of the time, the UWISRC said.

No dome was visible, although a spine could be seen through the clouds.

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.

Explosions with accompanying ashfall, of similar or larger magnitude, can restart with little or no warning, the UWISRC said.

The La Soufriere volcano began erupting explosively on April 9, 2021, after months of continuous effusive eruptions which began on December 27, 2020.

Since April 9, there have been more than 30 identifiable explosions at the volcano, with 9 of them being large enough to send an ash plume several kilometers into the sky.

Below is the full report:

La Soufrière, St. Vincent SCIENTIFIC UPDATE – 26/04/21 6:00PM

  1. Seismic activity at La Soufrière, St Vincent has been low after the tremor associated with the explosion and ash venting around noon on 22 April.
  2. Only a few long-period, hybrid and volcano-tectonic earthquakes were recorded and there was no further tremor.
  3. An observation flight took place today in a fixed-wing aircraft at about 11:30 am. Visibility was poor, with clouds blocking the crater for much of the time.
  4. White steam could be seen venting near-continuously from several locations on the crater floor. No dome was visible, although a spine could be seen through the clouds.

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

  1. The volcano is at alert level Red.
  2. Visit https://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.
  3. Visit the International Volcanic Hazard Health Network for volcanic ash information and resources:
    http://www.ivhhn.org/information

NEMO St. Vincent and the Grenadines
API – The Agency For Public Information : St. Vincent and the Grenadines
Department of Emergency Management
NEMO Saint Lucia
CDEMA – Caribbean Disaster Emergency Management Agency

lasoufriere #volcano #svg

RedAlert #stilldangerous #TeamSRC

Photo: Prof. Richard Robertson

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