Galeras

Aim of the project was a constant geophysical monitoring of the Galeras volcano. The last eruption before occurred in 1993 and caused the death of 9 people which were inside the caldera at the time of the eruption.

The multi-parameter station at Galeras Volcano (Colombia): concept and realization.

Key words: seismology, Galeras volcano, b-value, earthquarques.

Galeras volcano is located in southwestern Colombia, 9 km from the city of San Juan de Pasto (pop.

The three-dimensional mapping of b for Galeras volcano (Figure 9) confirms that the high b-values region is located beneath the active crater and vertically elongated down to 5 km depth.

(1997): "Emplacement and evolution of the andesitic dome of Galeras volcano, 1990-1992".

(1990): "Geology and Volcanology of the recent evolution of Galeras volcano, Colombia".

Chouet (1997): "Long-period events, the most characteristic seismicity accompanying the emplacement and extrusion of a lava dome in Galeras volcano, Colombia, in 1991".