On the afternoon of this Monday, April 11, the Colombian Geological Survey (SGC) and the Manizales Risk Management Unit reported that the Nevado del Ruiz volcano emitted a column of smoke with ...

During the last few days, volcanic activity was recorded in Nevado del Ruíz, seismic movements ... The current activity of Ruiz is associated with the fracturing of a rock inside the volcanic ...

When this volcano eventually blows ... The deadliest lahar in recent history resulted from a 1985 eruption of the Nevado del Ruiz stratovolcano in Tolima, Columbia. Within hours of the eruption ...

Colombian scientists monitoring Nevado del Ruiz had cautioned town leaders of Armero about the volcano's increased activity and even radioed urgent messages on the night of the eruption.

The volcanoes featured in the NOVA program "Volcano's Deadly Warning"—Galeras, Nevado del Ruiz, Popocatepetl, and Mt. Redoubt—as well as many other famous volcanoes, including Mt. St. Helens ...