Increased rock fracturing at Colombia’s Nevado del Ruiz volcano

Increased rock fracturing at Colombia’s Nevado del Ruiz volcano

A notable increase in seismic activity associated with rock fracturing started at Colombia’s Nevado del Ruiz volcano on January 3, 2024. The alert status remains at Yellow, indicating unstable behavior and potential for quick escalation. This volcano is known for producing the deadliest lahar in history.

Increased seismic activity and degassing at Colombia’s Puracé volcano

Increased seismic activity and degassing at Colombia’s Puracé volcano

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.

Seismic activity intensifies at Colombia’s Nevado del Huila volcano

Seismic activity intensifies at Colombia’s Nevado del Huila volcano

At 00:38 local time on October 21, 2023, Colombia’s Nevado del Huila volcano experienced a significant earthquake with a magnitude of 3.6 at a depth of 1 km (0.6 miles) below its Central Peak. From then until 08:00 local time, a total of 320 earthquakes were recorded, associated with rock fracturing inside the volcano.

Increased soil temperature detected at Machín volcano, Colombia

Increased soil temperature detected at Machín volcano, Colombia

The Colombian Geological Service (SGC) found changes in vegetation and increased soil temperature during their inspection of the Cerro Machín volcano. The last eruption at this volcano took place in 1180 CE ± 150 years.