Another volcano awakening? Rise in activity at Colombia’s dreaded Nevado del Ruiz volcano

February 26, 2012 COLOMBIA 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. On November 13, 1985, a small eruption from Nevado produced an enormous lahar that buried and destroyed the town of Armero in Tolima, causing an estimated 25,000 deaths. This event later became known as the Armero tragedy—the deadliest lahar in recorded history. 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. The volcano last erupted in 1994. –Volcano Discovery
This entry was posted in Earth Changes, Earth Watch, High-risk potential hazard zone, Potential Earthchange hotspot, Seismic tremors, Signs of Magnetic Field weakening, Volcano Watch. Bookmark the permalink.

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