The IG reported that during 15-22 July, explosions from Tungurahua were detected by the seismic network. Although clouds occasionally inhibited visual observations, steam and ash-and-steam plumes were spotted and rose to altitudes of 7-10 km (23,000-32,800 ft) a.s.l. and drifted W and SW. On 19 and 22 July, nighttime incandescence from the crater was observed. On 20 July, lahars descended NW and S drainages. Ashfall was reported in areas downwind during 19-22 July. On 21 and 22 July, explosions vibrated windows in areas NW.
Source: Instituto Geofísico-Escuela Politécnica Nacional (IG) – “Reports provided courtesy of the Smithsonian’s Global Volcanism Program and the US Geological Survey’s Volcano Hazards Program.”