Monitoring this week showed an increase of seismicity associated with fluid movements. This increase began in the evening hours of Saturday, September 5, and it was recorded a seismic swarm (large number of earthquakes in a short time).
At the time of writing this newsletter the swarm continues although with less intensity. Most of the seismicity is in the vicinity of the active crater at depths of less than 2 km from the summit of Galeras. The characteristics of seismicity which is recorded indicate that it is the answer to hydrothermal activity in the area and as such, does not require a change in the level of volcanic activity.
September 09, 2015. Galeras, Colombia :
Source : SGC.
Photo : Ingeominas