Nevado Santa Isabel , Colombia : volcano-tectonic earthquake, combined with the fracturing of rocks within the volcano.

Nevado Santa Isabel , Colombia : volcano-tectonic earthquake, combined with the fracturing of rocks within the volcano.

Bulletin Special activity of Nevado Santa Isabel volcano, June 13, 2016 Subject: Green Level of activity or (IV) is maintained: Changes in the behavior of volcanic activity. Regarding the monitoring of the activity of the Nevado Santa Isabel volcano, the Geologico Servicio Colombiano reports:…