Based on information from the Guayaquil MWO, the Washington VAAC reported that on 12 August an emission from Sangay rose to altitudes of 6.1-6.4 km (20,000-21,000 ft) a.s.l.
and drifted SW and NW.
Ash in the emission was not detected in satellite data.
On 13 August satellite data showed a well-defined thermal anomaly over the volcano, and an ash plume drifting 55 km SW.
Source: Washington Volcanic Ash Advisory Center (VAAC)