Increased activity at Reventador 29 September 2010Posted by admin in activity reports, Ecuador, Reventador.
Ecuador’s Instituto Geofísico (IG) is reporting increased activity at Reventador, with an increase in seismicity from ‘low’ to ‘moderate’, episodes of tremor, and a number of small explosions having been observed.
In a special bulletin (PDF) issued yesterday, the IG reports that ‘three pulses of activity’ were recorded on the morning of 27 September: a pulse of harmonic tremor from 07:05 to 08:43 (all times are local), an episode of tremor for 30 minutes from 09:07 with higher amplitude than the first pulse, and which was associated with a grey plume of water vapour with a small amount of ash that rose 400-500 metres above the summit; and a third pulse which began at 09:49 and lasted for 17 minutes and produced a grey plume of water vapour with moderate ash content, which reached higher than 1 km above the summit. Washington VAAC has issued four ash advisories reporting ‘possible ash emissions’ from Reventador moving north-west from the volcano.
UPDATE. Erik has more information over at Eruptions: Increased activity at El Reventador in Ecuador.
Se incrementa actividad de volcán en Ecuador – El Nuevo Herald, 28 September 2010