Cerro Negro de Mayasquer volcano news & activity updates:
Cerro Negro de Mayasquer volcano (Colombia) activity update
Wednesday Jul 23, 2014 14:37 PM | AUTEUR : T
Seismic unrest continues at the volcanic massif of Chiles and Cerro Negro. However, it decreased during the past week with less than 700 events recorded, compared to 1500-1800 per week during the month before.
Most earthquakes were associated with internal rock fracturing and located at shallow 1-7 km depth in an area 4 km SW of the Chiles dome. Magnitudes reached 2.7 and some quakes were felt.
Slight deformation has been detected at the Chiles dome as well.
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Friday, May 30, 2014
Unrest at the volcano continues in the form of earthquakes under the Chiles-Cerro Negro volcanic massif. During the past week, the monitoring network recorded around 6500 quakes, mostly located less than 4 km SW from the summit at depths ranging between 1 and 8 km and with magnitudes of up to 4.0 on the Richter scale. ... [details]
Saturday, May 10, 2014
The seismic crisis under the volcano continues. Thousands of small earthquakes, both volcano-tectonic (due to rock fracturing caused by magma pressure) and long-period (due to fluid movements) earthquakes continue to be registered. ... [details]
Friday, May 02, 2014
The alert level of the twin-volcanoes Cerro Negro and Chiles has been raised to yellow in response to an ongoing seismic crisis and deformation that has been detected since November 2013, when a new monitoring network had been installed. ... [details]