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Increased activity at Reventador 29 September 2010

Posted by admin in activity reports, Ecuador, Reventador.
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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.

News
Se incrementa actividad de volcán en EcuadorEl Nuevo Herald, 28 September 2010

Information
Global Volcanism Program: Reventador – summary information for Reventador (1502-01=)
Instituto Geofísico – Geophysical Institute of Ecuador

The Volcanism Blog