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Central Colombian volcanologists warned Saturday that seismic activity inside the Nevado del Ruiz volcano has increased.
According to the Manizales Volcanological and Seismological Observatory, the volcano showed an increase in activity between 4:00AM and 5:30AM that caused minor trembles.
Local authorities maintain the alert level at orange as the volcano continues to remain unstable and spew gases.
The alert level was raised to orange on March 31 after an increase in seismic activity increased chances of a possible eruption.
The most tragic eruption of the Nevado del Ruiz took place in 1985 when 25,000 were killed.
