Galeras update, 18 March 2009 18 March 2009Posted by admin in activity reports, Colombia, Galeras.
Tags: Colombia, Galeras, South America, volcanic activity reports
The latest bulletin on Galeras from the INGEOMINAS Pasto volcanological observatory, issued on 17 March 2009 at 17:30 local time, reports that seismicity is at low levels, with no seismic activity at all for some periods. Sulphur dioxide emissions are showing considerable fluctuation: on 17 March levels were ‘low to moderate’ at 570 tonnes per day, whereas on 15 March the level was 2000 tonnes per day, and on 16 March 1600 tonnes per day. Poor weather has prevented visual observations. The bulletin concludes:
While the recent explosive eruptions at Galeras (14 and 20 February, 13 March) have allowed the release of accumulated pressure within the volcanic system, the general behaviour of the volcano indicates that the conditions continue to reflect possible processes of seal-release.
This can be taken to mean that further explosive eruptions are viewed as likely, as pressure accumulates beneath the solid material that currently blocks the vent. The alert level for Galeras thus remains at Orange (II), ‘eruption likely within days or weeks’.
For all our Galeras coverage: Galeras « The Volcanism Blog.
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