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Cerro Negro de Mayasquer volcano
stratovolcano 4445 m / 14,583 ft
Colombia, 0.83°N / -77.96°W
Current status: restless (2 out of 5)
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Cerro Negro de Mayasquer volcano eruptions:
1936(?)
Typical eruption style:
explosive
Last earthquakes nearby
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Cerro Negro de Mayasquer volcano news & activity updates:

Cerro Negro volcano (Colombia): small earthquakes

Thursday Mar 13, 2014 17:46 PM | BY: T
Map of seismicity near Cerro Negro volcano (Image: INGEOMINAS / Pasto Observatory)
Map of seismicity near Cerro Negro volcano (Image: INGEOMINAS / Pasto Observatory)
More than 11,000 micro-earthquakes at shallow depths were recorded beneath the volcanoes of Cerro Negro de Mayasquer and Chiles during the past few months, INGEOMINAS Pasto volcano observatory reported.
The seismic record for Cerro Negro volcano goes only back to past November when a small network of seismometers and tiltmeters was installed, so it is not known whether the observed seismic activity is abnormal or part of the normal behavior of the volcano, which last might have erupted in 1936 and has only fumarolic activity at present. In absence of stronger signs of unrest, the alert level of Cerro Negro remains at green for the moment.
The report mentions that a decrease in earthquakes was observed in the first months, while the numbers increased again this March. All quakes were tiny, not exceeding magnitude 1.2. Their hypocenters are located in a cluster a few km SE of Cerro Negro de Mayasquer and mostly between 3 and 5 km depth beneath the summit.

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