Nevado del Ruiz volcano news & activity updates
Nevado del Ruiz volcano (Colombia): new ash emissions since 13 July
Wednesday Jul 22, 2015 13:47 PM | BY: T
Ash emissions from Nevado del Ruiz on 19 July
Intermittent ash emissions began to occur at the volcano again since 13 July. The volcano observatory of Manizales reports increased seismic activity, related to internal fluid movements and rock fracturing processes.
Ash emissions from Nevado del Ruiz on 19 July seen from Manizales
Ash fall occurred on 13 July in nearby villages in up to 30 km distance to the southwest (in Chinchina). On 19 July, another series of explosions produced ash plumes that rose approx. 1 km above the crater and quickly dissipated.
According to scientists, the current magmatic system of Nevado del Ruiz is controlled by 3 reservoirs (magma chambers): one with basaltic magma at approx. 10 km depth, a second one with cooler and more silica-rich (dacitic) magma at approx. 5 km and a near-surface one at 2 km depth with an intermediate (andesitic) magma.
This system is connected to the surface with a very active hydrothermal system that provides a way to exchange heat by circulating fluids, and occasionally produces phreatic (steam-driven) explosions like the ones seen during the past months.
Wednesday, Jun 10, 2015
Washington VAAC reported that on 6 June an ash emission from Nevado del Ruiz rose 800 m above the summit and drifted WNW. [more]
Thursday, May 28, 2015
Unrest continues at the volcano. Strong steam emissions, sometimes mixed with light ash continue, accompanied by elevated seismic activity inside the volcano. ... [more]
Sunday, May 24, 2015
Mild ash emissions continue to occur irregularly from the volcano, producing plumes of a few hundred meters height. More intense activity yesterday prompted authorities to close the Manizales regional airport "La Nubia" until 31 May. [more]
Wednesday, Apr 22, 2015
Activity at the volcano has increased during the past week. Accompanied by elevated seismic activity, ash emissions have been occurring since 14 April. The strongest phase of activity was on 19 April, when ash plumes rose to estimated 900 meters above the summit. ... [more]