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Nevado del Ruiz volcano (Colombia), activity update: increase in shallow earthquakes under Arenas crater

Sunday Feb 26, 2012 06:56 AM | BY: T

From 12:30 hours local time on February 23, a new increase in seismic activity of the Nevado del Ruiz volcano began, characterized by the occurrence of shallow earthquakes associated with fluid movements and fracturing of rock. INGEOMINAS also measured increased SO2 emissions and some changes in strain measurements.
So far, the energy level of this increase is low compared with previous episodes of unrest, but small eruptions in the near future are possible.
The seismicity is located under the active Arenas crater at depths ranging between 0.5 and 3 km, and reached a maximum recorded magnitude of 1.4 on the Richter scale.
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Links / Sources:
Previous news
Thursday, Feb 23, 2012
The new Smithsonian / USGS Weekly Volcanic Activity Report is out. Updates include: ... [more]
Saturday, Feb 18, 2012
Photos from our last tour to Guatemala (Jan 2012) - Pacaya, Atitlan, Santiaguito and Fuego volcano are now online! The next tours to Guatemala: 8-21 Dec 2012 and 22 Dec 12 - 4 Jan 13. [more]
Wednesday, Feb 15, 2012
The new USGS / GVP weekly activity updates report is now available. The summary: ... [more]

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