July 08, 2015. English . Nevado Del Ruiz .
July 08, 2015.
Nevado del Ruiz , Colombie :
Volcano‘s activity level of Nevado del Ruiz: Yellow or (III): changes in the behavior of volcanic activity.
Regarding the monitoring of the activity of Nevado del Ruiz volcano, the SERVICIO Geologico COLOMBIANO through the OBSERVATORIO VULCANOLÓGICO Y SISMOLÓGICO OF MANIZALES, informs that:
During the last week, the various monitoring parameters show that the volcanic system remains unstable. Seismicity was mainly associated with fluid dynamics in volcanic conduits. This activity is mainly located in the vicinity of Arenas Crater, to the east and southeast of it and was characterized by the recording of several episodes of volcanic tremors, which were associated with the movement of fluids, gas emissions and ash into the atmosphere, as it was confirmed with the images captured by the cameras installed on the volcano and the reports made by officers of the Los Nevados Nature Park (NNNP) and the Colombian Geological Survey (CMS).
In addition, we continued the recording of seismic activity associated with the fracturing of the rock in the volcanic structure. Earthquakes are located mainly in the northeast and southwest of the volcano, and to a lesser extent in the crater at depths ranging between 1.2 and 6.3 km. The maximum magnitude recorded during the week was 1.9 ML (local magnitude), corresponding to a seismic event in the southwest of Arenas crater, 6 July at 20:21 (local time) at a depth of 5, 43 km.
The volcano, in the atmosphere, continues to transmit significant quantities of water vapor and gases, including sulfur dioxide (SO2). The gas and steam column reached a height of 1600 meters above the summit of the volcano, and dark shades are sometimes observed due to the presence of volcanic ash. The direction of the dispersion of the column is in agreement with the wind regime, which remained mainly towards the northwest sector of the volcanic edifice.
Source : SGC.