Tungurahua had occasional seismic swarms after the eruption, but no reported surface activity for the remainder of 20. An inflationary trend was recorded from early March through late September 2016, after which a period of deflation began. Significant SO 2 emissions were recorded by satellite data between 27 February-8 March. Pyroclastic flows affected many of the ravines, although no communities reported damage. Incandescent blocks were ejected up to 1,500 m down most flanks.
Multiple explosions with ash plumes that rose 3-8 km were frequent. The latest eruptive episode at Tungurahua lasted from 26 February-16 March 2016. The next episode began in late February 2016 and is discussed below with information provided by the Observatorio del Volcán Tungurahua (OVT) of the Instituto Geofísico (IG-EPN) of Ecuador, aviation alerts from the Washington Volcanic Ash Advisory Center (VAAC), and other sources of satellite data. This type of activity continued throughout 2015 (BGVN 42:08, 42:12) Strombolian activity, significant ash emissions, and SO 2 plumes in mid-November 2015 marked the last significant activity for that year. Periods of activity over several weeks that included ash plumes, Strombolian activity, pyroclastic flows, and lava flows were often followed by quiescence for a similar time span. Ash emissions, explosions, and pyroclastic flows 26 February-16 March 2016 no further activity through 2017Įpisodic eruptive activity at Ecuador's Tungurahua has persisted since November 2011.
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