The Colombian Geological Service (SGC) reported that Nevado del Ruiz volcano activity continues to be very “unstable” and “more likely”. erupts more in days or weeks than in the last 10 years“.
SGC reported that the activity of the volcano continues at the orange level. increased probability of explosion.
“To change the level and return to the yellow level, it takes a reasonable amount of time to observe trends and patterns that allow us to understand the potential decline in activity,” he details.
Therefore, SGC recommends that communities in its domains follow the directions of Risk Management authorities.
“We urge the public to learn about the behavior of the volcano through the official channels of the Colombian Geological Service,” the experts said.
(You may be interested in: Live: This is the current state of Nevado del Ruiz volcano | El Tiempo).
According to SGC, seismic activity associated with rock breaking within the volcanic structure yesterday showed a slight increase in the number of earthquakes compared to the previous day.
This type of seismicity characterized mainly by the occurrence of small earthquakesIt is located in the Arenas crater, which is associated with the activity of the lava dome (protrusion or mound) located at the bottom of the crater.
“In parallel, the seismicity associated with the movement of fluids within the volcanic channels and associated with ash emission continues. The maximum height of the observed gas and/or ash column was 1,100 m. The volcano with a dominant distribution direction to the northwest,” details SGC.
And they add: “Although the seismicity of the fracture may vary and relocate, the presence of thermal anomalies at the bottom of the crater that are larger than those presented in previous months are parameters associated with -sometimes ongoing- ash egress. This indicates a higher activity level than previous weeks that needs to be monitored continuously and in particular”.
Recently, John Macario Londoño, SGC’s Geothreats coach, He noted that seismic activity is now concentrated near the crater..
“The current state of the volcano is still very unstable. It changed the seismicity dynamics. “While earthquakes continue to be recorded in different areas around the crater, the main feature we observed is that the earthquake is already intensifying in the crater,” he said.
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This is because the magma is now closer to the volcano’s mouth and also interacting with magma that has been in the same area since 2015. According to the expert, this accumulation of fluid has different effects:
“This seismicity is different from the others because it’s a result of the activity of fluids, both up to the atmosphere and inside the volcano. This means more outgassing, more ash, and thermal anomalies that persist at the bottom of the crater.”
CAMILO PEÑA CASTANEDA
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