Volcano activity report

Last updated: Sunday 27 April 2025

Pacaya Volcano

Degassing can be observed emanating from the Mackenney Crater, extending approximately 600 meters southward. Seismic stations have identified short-lived degassing events, confirming a low level of activity. No incandescent reflections were observed during the night and early morning, nor were any reports of sounds or explosions. The possibility of prolonged periods of degassing or degassing columns containing abundant ash cannot be ruled out.

Fuego Volcano

Weak and moderate degassing is observed emanating from the crater, dispersing in a northerly and northwesterly direction. Acoustic sensors identify a few degassing pulses, and the largest seismic events are associated with the movement of magma and gases within the volcanic edifice. Weak and moderate explosions could occur at any time. Under favorable atmospheric conditions, incandescence emanating from the crater may be observed during the night and early morning. Consult and follow the recommendations attached to this bulletin and special bulletin BEFGO-08-2025. Consider that lahars may be generated in the various ravines of the volcano due to rainfall that may occur in the afternoon or evening.

Santiaguito Volcano

Degassing is observed recurrently, reaching 500 meters above the Caliente dome. During the early morning, incandescence can be observed coming from the dome of the Caliente dome and the middle part of the lava flow, indicating that lava continues to extrude in the form of blocks in a west and southwest direction. The monitoring network of seismic and acoustic sensors allows the identification of weak and moderate explosions, which can cause incandescence and columns of gas and ash with heights of up to 3,500 meters above sea level (10,498 feet), as well as avalanches in east, south, southwest and west directions. The ash can disperse 15 to 40 km to the west and southwest, which can generate fine ashfall on farms and communities near the volcano. The Santiaguito volcano continues with high activity, so the occurrence of block and ash flows, of moderate to strong characteristics, as well as possible long-range pyroclastic flows in different directions, cannot be ruled out. Therefore, follow the recommendations of the special bulletin BESAN-002-2025.