No significant change at La Soufriere: Swarm of long-period, hybrid earthquakes continues

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Dr Thomas Christopher conducts a field survey on Leeward side of St Vincent. Photo: Richard Robertson, UWI-SRC

By Caribbean News Global contributor

KINGSTOWN, St Vincent — La Soufriere 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 occur with little or no warning, says NEMO St. Vincent and the Grenadines.

Swarm of long-period, hybrid earthquakes continues at La Soufrière

La Soufriere, St Vincent Scientific update – 18/04/21 6:00 pm

  1. The swarm of long-period and hybrid earthquakes continued at La Soufrière with no significant change in their rate of occurrence.
  2. Occasional small volcano-tectonic earthquakes were still being recorded.
  3. An explosion generated a period of high-level tremor starting at 4:49 pm on April 18.
  4. The resulting eruption plume rose to above 8km and drifted to the south and southwest of the island.
  5. Measurements of sulphur dioxide flux (mass) at La Soufriere volcano were again undertaken along the west coast yesterday and today.
  6. An average SO2 flux of 232 and 391 tons per day on and April 17 and 18, respectively, was recorded.
  7. 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.
  8. Explosions with accompanying ashfall, of similar or larger size, can occur with little or no warning impacting St Vincent and neighbouring islands.
  9. The volcano is at alert level Red

 

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