Nevado del Ruiz volcano eruption
A strong explosion occurred at the volcano Nevado del Ruiz in Colombia on March 31, 2016. Just prior the eruption increased seismic activity was captured by seismometers around the volcano.

The resulting ash column rose 3,500 m to 30,000 ft (9 km) altitude and drifted NW. Ash fall is likely in nearby areas.

The Manizales volcano observatory reported that over the past days, a number of similar, but weaker tremor pulses were recorded at the volcano recently.

When the summit of the volcano was not in clouds, it could be observed that at least some of these weak volcanic earthquakes also produced small to moderate ash emissions.

And the volcanic unrest continues...