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Explosive eruption at Galeras 30 September 2009

Posted by admin in activity reports, Colombia, eruptions, Galeras.
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Galeras volcano in Colombia erupted explosively at 09:14 local time today, and is currently on the highest alert level of Red, ‘eruption imminent or under way’. There are no reports of deaths or injuries. INGEOMINAS Observatorio Vulcanológico y Sismológico de Pasto issued an extraordinary bulletin on the eruption at 12:20 local time today, which reports:

  • The explosive event occurred at 09:14. National Parks personnel nearby ‘reported two explosions and the emission of incandescent material in the sector of the active cone’.
  • The eruption generated a column of ash which reached approximately 8 km above the summit, and was initially deflected to the east and later towards the north. ‘Measurements of sulphur dioxide taken between 09:30 and 10:00 showed high values of between 1100 and 9300 tonnes/day’.
  • Washington VAAC ‘estimated a height for the emission column of about 11 km. Satellite images showed that in the first minutes the column dispersed in a north-western direction and later the winds shifted it to the north’. Ashfall has been reported in Sandoná, Ancuya, Linares, La Llanada and Sotomayor.
  • The energy levels of today’s eruption were similar to those of the 7 June 2009 eruption, and roughly one third of the energy of the 20 February 2009 eruption.

Following the eruption, seismicity has fallen to a low level. INGEOMINAS is continuing to watch the volcano closely.

For all our Galeras coverage: Galeras « The Volcanism Blog.

Information
Global Volcanism Program – Galeras – summary information for Galeras (1501-08=)
Portal Corporativo de INGEOMINAS – Instituto Colombiano de Geología y Minería
Observatorio Vulcanológico y Sismológico de Pasto – Pasto volcanological observatory main page

The Volcanism Blog