Activity of Popocatépetl, Sabancaya, Ubinas, Santiaguito and volcanoes in Chile.

Cenapred provides information for the last 24 hours at Popocatépetl of 148 exhalations, a moderate explosion at 4:07 p.m., and 10 minor explosions on February 23 at 12:16 p.m., 6:45 p.m., 8:37 p.m. and 9:58 p.m., on February 24 at 12:08 a.m., 1:01 a.m. , scattered to the southwest.

In addition, 525 minutes of tremor were recorded.

In the morning, gas and ash emissions scattered towards the northeast are observed.

This February 25, an explosion at 12:16 a.m. sprayed incandescent materials on the flanks of the volcano accompanied by a plume of gas and ash at 1,500 meters dispersed towards the northeast.

The volcanic alert remains at amarillo fase 2, with a 12 km exclusion zone.

Source: Cenapred

Sabancaya activity during the week of February 17-23 remained at moderate levels. For the following days, no significant change in activity is expected.

The IGP recorded and analyzed the occurrence of approximately 782 volcanic earthquakes, associated with the circulation of fluids (magma, gas, etc.) inside the volcano. An average of 16 medium to low daily explosions were recorded, accompanied by plumes of gas and ash up to 3,000 meters in height above the summit.

The sulfur dioxide emissions recorded by the Sentinel-5 P / Tropomi satellite are significant.

The monitoring of the deformation of the volcanic structure records significant anomalies.

Satellite surveillance made it possible to identify the presence of 2 thermal anomalies of values ​​between 2MW and 3MW, associated with the presence of a lava dome of approximately 280 m in diameter at the crater of the volcano.

On February 24 at 1:23 p.m. local, the IGP recorded and reported the descent of a lahar (volcanic mud flow), by the Huayuray-Pinchollocon stream direction of the Colca river, with a likely affectation of the main Chivay road -Cabanaconde

The Sabancaya volcanic alert level remains orange, with a 12 km prohibited zone.

In addition, the early warning system for the lahars of the Ubinas volcano recorded the descent of a lahar, of moderate to high volume, along the southeast flank of the volcanic massif, along the Volcanmayo gorge, at a distance of about 2 km from the town of Ubinas. It is recommended that people stay away and avoid driving on the road that crosses the channel of this stream.

Source: I.G. Peru & Tropomi

The Santiaguito volcano presented degassing pulses on February 24, which rises to a height of 3,000 meters above sea level and disperses to the southwest.

Low explosions have been recorded in the past 24 hours accompanied by ash plumes at heights of 3,100-3,200 meters asl. that disperse to the southwest.

Sources: Gobierno Guatemala, Insivumeh and Conred

A specific risk classification work for active volcanoes in Chile was carried out by a team from the national volcanic monitoring network of Sernageomin.

The summary is above for the 14 volcanoes most at risk; the full document, very instructive, can be viewed by following this link: https://www.sernageomin.cl/wp-content/uploads/2020/02/Presentaci%C3%B3n_Ranking_Volcanes_Sernageomin_2020-web.pdf

Source: Sernageomin