During 17-23 February IG reported a high level of seismic activity including explosions, volcano-tectonic events, long-period earthquakes, harmonic and spasmodic tremor, and signals indicating emissions at Reventador .
Cloud cover often prevented visual observations. On 18 February a gas-and-ash plume rose 500 m above the crater and drifted NW.
February 25, 2016. Reventador , Ecuador :
Elevation 3562 m
Source: Institut de géophysique–Escuela Politécnica Nacional (IG)