Column of ash volcano Nevado del Ruiz reached three thousand meters
3 MARCH 2016. On Thursday, a new issue of ash in the Nevado del Ruiz volcano was recorded. This time the Volcanological and Seismological Observatory of Manizales reported that volcanic tremor signal was present, which is associated with the emission of gases and ash into the atmosphere.
According to the authorities the ash column reached the three thousand meters high and it is possible that it will fall in the departments of Caldas, Risaralda and Quindio.
Due to ashfall, air operations were canceled as the ash is covering the route Bogota – Manizales – Bogota. This closure st Airport La Nubia caused the Minister of Commerce, Cecilia Alvarez, canceled his schedule in the capital of Caldas.
Subject: Activity Bulletin of Nevado del Ruiz volcano.
The level of activity continues at level :
Activity level Yellow or (III): changes in the behavior of volcanic activity.
Regarding the monitoring of the activity of the Nevado del Ruiz, the Colombian Geological Survey reports that:
During the last week, the volcanic system continued to show unstable behavior. The recorded seismic activity is mainly associated with the fracturing of the rock in the volcanic structure. This type of seismicity is mainly located in the distal areas of North and West, and to a lesser extent and spread throughout the Southeast areas , the Northeast and Northwest areas compared to the Arenas crater and near the crater. The depths of earthquakes vary between 0.4 km and 8.8 km. The appearance of multiple fracture type of earthquakes increased during the 23, 24 and 26 February , located in the distal areas of the North (7.9 km from the crater) and South (2.3 km from the crater). The largest seismic event of the week was of magnitude 2.4 ML (local) on February 24 at 4:44 p.m. (local time), located North of Arenas crater at a depth of 5.1 km.
Seismic activity related to fluid dynamics in volcanic conduits, was characterized by the occurrence of earthquakes long period (LP), short pulses of volcanic tremors and some continuous tremors episodes with importants energy levels , some associated with ash emissions. These seismic signals were mainly located near the Arenas crater and in the South and Southeast areas of the volcano.
The volcanic deformation measured from electronic inclinometers, global navigation satellite systems (GNSS) and satellite images, which record changes in the tilt, the position and shape of the volcano (respectively) during the last evaluation period continues to make changes.
The volcano continues to emit into the atmosphere large amounts of steam and water gases, including sulfur dioxide (SO2)which is distinguished as it was estimated by the permanent stations DOAS SCAN installed in the volcano area and satellite imagery.
The column of gas, steam and ash reached a height of 1,700 meters above the summit of the volcano on 25 February. The direction of the dispersion of the column was in line with the prevailing wind in the area, which during the week showed a predominant direction towards the northwest over the volcano.
March 04, 2016. Nevado Del Ruiz , Colombia :
Sources : W RADIO , Sgc.
Photos : Wikipedia ( 1985)