Nevado del Ruiz (Colombia) - Report for 3 August-9 August 2022

On 2 August Servicio Geológico Colombiano?s (SGC) reported that during the previous week the number and size of seismic signals indicating fluid movement had increased at Nevado del Ruiz compared to the week before, though they remained at moderate levels.
Although seismic signals indicating rock fracturing increased in number, magnitudes were similar to the previous week.
Several episodes of drumbeat seismicity were recorded, indicating continuing growth of the lava dome.
Gas-and-steam emissions rose from the crater, reaching just over 2.4 km above the summit on 30 July.
Several thermal anomalies in Arenas Crater were identified in satellite images during 0500-0600 on 4 August, and seismic signals indicating emissions were recorded during 4-5 August.
Ashfall was reported in the municipalities of Santa Rosa de Cabal, Pereira, Villamaría, Manizales, and Dosquebradas.
Tephra deposits were visible near the crater and in areas up to 3 km away.
The Alert Level remained at 3 (Yellow; the second lowest level on a four-color scale).

Source: Servicio Geológico Colombiano (SGC)

Fonte/Source: Global Volcanism Program/Smithsonian Institution

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