Anomalous seismic activity was also observed centered in a source deep , southwest of the summit . Microseismic activity was also registered . Such seismicity exceeds that of other volcanoes in the region ( with the exception of Lascar during active periods , and Lastarria and San Pedro ) and is unlikely to be normal background activity for the area . Some earthquake activity and seismic swarms were triggered by the 2010 Chile earthquake , which may be indicative of unstable hydromagmatic systems or interactions of the magmatic system with far field earthquake waves . Hypotheses regarding the earthquake activity either consider shallow faults deforming in a brittle manner , groundwater movements or a combination of these with a disturbance of a hydrothermal system . The presence of partial melts below the Altiplano – Puna volcanic complex suggests a magmatic origin of the activity
2010 Chile earthquake
2010 Chile earthquake
Uturunku