Although clouds occasionally inhibited visual observations, IG reported that during 25-27 June, steam and ash-and-steam plumes from Tungurahua rose to an altitude of 6 km (19,700 ft) a.s.l. and drifted W and N. Incandescence from inside the crater was observed at night. On 29 June, an explosion generated a “cannon shot” noise and roaring, and caused windows to vibrate in Cusúa, about 7 km NW. More explosions were felt later that day. On 30 June and 1 July, slight ashfall was reported in the town of Manzano, about 8 km SW.
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.”