Chile and Argentina on alert after 60 quakes in 45 minutes shake Lanin Volcano – Alert level raised to Yellow


The alert level of Lanin volcano was raised to yellow by the Chilean National Geology and Mining Service (Sernageomin) after a swarm of 59 quakes in 45 minutes hit Lanin volcano on February 15, 2017.

Chile and Argentina on Alert due to this sudden increase in volcanic activity! Next large eruption ahead? The last explosion of the volcanic peak occurred about 1500 years ago.

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The last known eruption at Lanin volcano occurred about 1500 years ago according to the Smithsonian Institution. Picture via Tierras Patagónicas

According to the special report of volcanic activity, a simultaneous succession of volcano-tectonic seismic events (VT) and spasmodic tremor was recorded from 3:24 pm. This kind of  seismicity is associated with movement of fluids inside the volcano.

This has happened in combination with long period earthquakes (LP). The first seismic swarm recorded 59 events in 45 minutes.

The anomalous activity – with same intensity – was continuing after the report was issued. Consequently, Sernageomin estimated that this enhanced activity could be due to the destabilization of the entire volcanic system.

Given the relevance of this unusual activity, it was decided to raise the technical alert at the Yellow level, in accordance with the fact that the energy thresholds are above the baseline.

Here a video from the crazy eruption of Calbuco volcano in 2015:

The Civil Protection System and the Argentinian Mining Geological Service (Segemar) have been contacted to take measures to safeguard the security of the population on both sides of the border.

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