Internal activity level of the Nevado del Ruiz volcano.
Yellow activity level or (III): changes in the behavior of volcanic activity.
Regarding the monitoring of the activity of the Nevado del Ruiz volcano, the SERVICIO Geologico COLOMBIANO through the OBSERVATORIO VULCANOLÓGICO Y SISMOLÓGICO OF MANIZALES, reports that:
During the last week, the volcanic system has continued to be unstable, as shown by the various monitoring parameters. Seismicity was mainly associated with fluid dynamics in volcanic conduits. This activity is mainly located in the crater, east, south and southeast of this one, and was characterized by recording multiple episodes of volcanic tremor, associated with the movement of fluids, gases and ash emissions into the atmosphere.
In addition, continued recording of seismic activity associated with the fracturing of the rock in the volcanic structure. Earthquakes are located mainly in the Northeast, Southeast, Southwest and near the crater at depths between 0.5 and 6.5 kilometers. The maximum magnitude recorded during the week was 2.2 M ml (local magnitude), corresponding to an earthquake located 2.6 km north of Arenas crater, which occurred on August 22 at 8:59 p.m. (local time ) at a depth of 3.77 km. The registration of a significant increase in seismic activity is distinguished, associated both to the fracturing of the rock within the volcano, as well as fluid movements, predominantly located close to the Arenas crater at depths of less than 2.5 km during the day of August 20. Continuous volcanic deformation show changes
The volcano continues to emit into the atmosphere a significant amounts of water vapor, gas, and sulfur dioxide (SO2). The gas and steam column reached a maximum height of 800 meters above the summit of the volcano, and is sometimes seen with gray tones due to the presence of volcanic ash. The direction of the dispersion of the column was in harmony with the wind regime, which remained mostly north-west sector of the volcanic edifice.
August 27, 2015. Nevado Del Ruiz, Colombia :
Source : SGC
Photo : Ingeominas.