On October 25, 2023, Colombia’s Puracé Volcano experienced a noticeable increase in seismic activity, with earthquakes reaching a maximum magnitude of 1.0. Located between 1 and 4 km (0.6 – 2.5 miles) in depth, these quakes coincided with higher degassing levels and persistent high CO2 values.
After 89 days of Orange alert due to increased seismic activity, Colombia’s geological service lowered the Nevado del Ruiz volcano’s alert level to Yellow on June 27, 2023. The de-escalation follows a period of decreased instability, paving the way for the potential easing of preventative measures.
Colombian officials began to evacuate people living on the slopes of the Nevado del Ruiz volcano on Monday, April 3, 2023. The decision follows the highest levels of seismicity since the 1985 eruption (VEI 3) when 25 000 people were killed.
A vigorous eruption took place at Nevado del Ruiz volcano, Colombia at 14:02 UTC on March 20, 2023. The Alert Level remains at 3 (Yellow — the second lowest level on a four-color scale). The last major eruption of this volcano occurred in 1985 and resulted in the deaths of over 20 000 people due to lahars.
Seismicity under Machín volcano started increasing at 11:23 LT on December 2, 2022, with signals indicating rock fracturing. This small but explosive volcano is located at the southern end of the Ruiz-Tolima massif. Its last eruption took place in 1180 CE.
A new increase in seismic activity has been recorded in the area of the Chiles-Cerro Negro Volcanic Complex (CVCCN) and its surroundings since May 2022, which includes volcano-tectonic and long-period earthquakes which are now at more shallow depths than those recorded in previous years.
A shallow earthquake registered by the Geological Service of Colombia (SGC) as M5.4 hit 12 km (7.4 miles) NE of the Central Peak of the Nevado del Huila volcano at 12:32 UTC (07:32 local time) on January 26, 2019. The USGS is reporting it as M5.6 at a depth of 10 km…
Colombian authorities are reporting significantly increased seismic activity under Galeras volcano, one of Colombia's most frequently active volcanos. Increased seismicity was first recorded on May 29 and June 2, 2018. The last eruption of this volcano took…
