Activity of Stromboli, Etna, Pacaya, 3 Chilean volcanoes and seismic swarm near Chichonal.

The National Institute of Geophysics and Vulcanology, Etnéo Observatory, communicates that from 11:45 hours GMT on January 22, 2021, on the images of the surveillance cameras of the INGV-OE show a lava overflow of the crater zone North of Stromboli. The heat flow is measured at VRP 24 MW.

The INGV informs at 16:14 UTC that the lava flow produced by the overflow formed at the North crater area continues to be well fed, and the front is located at about 600 m. The incandescent blocks that stand out from the front roll along the Sciarra del Fuoco, reaching the coast line. In addition, there is ordinary Strombolian activity from both North and South crater areas.

Regarding the size of the tremor at the STRA station, no significant variation appears and is maintained at medium and low values. The number and amplitude of the earthquakes of explosions show low values.

The deformation data do not show significant variations.

Source: INGV OE

A weak Strombolian activity continues at the eastern vent of the south-eastern crater of Etna; it is intermittent at the saddle vent on the evening of January 22, 2021.

Source: Boris Behncke

During the last hours, the Pacaya exhibits moderate to stronger explosions, accompanied by ash plumes scattering towards the northwest; The noise of locomotives and shock waves vibrate the surrounding windows and roofs.

This phase of Strombolian activity could last in terms of hours or days.

The lava flow is over a kilometer in length.

Source: Insivumeh

In Chile, 3 volcanoes remain on Amarilla technical alert.

Nevados de Chillán : it continues its eruptive cycle that began in 2016. In recent days it has featured minor explosions, with a slowly advancing lava flow and a growing lava dome inside the crater.

Villarrica : its activity consists of explosions at the level of the crater which, on certain occasions, emit pyroclastic rocks which could strike within a radius of 1000 meters around the crater, without prior warning.

Hudson : The technical alert has been raised to yellow due to the increase in Volcano-Tectonic (VT) seismicity associated with rock failure in the volcanic system. For the moment, SERNAGEOMIN continues to monitor this activity.

Source: Sernageomin & Volcanologia Chile

Between December 24, 2020 and January 19, 2021, the National Seismic Service (SSN) recorded a total of 22 earthquakes within a radius of 35 kilometers from the "Chichonal" volcano, with magnitudes between 3.4 and 4.1, and depths varying between 3 and 83 kilometers.

The "Chichonal", commonly known as "El Chichón", west of the Sierra Madre de Chiapas.

A group of specialists, scientists, academics and civil protection professionals agreed to reinstall a geodetic network with global positioning instruments, the capture of thermographic images, as well as the obtaining of photogrammetric data using drones.

This type of action aims to better detect, confirm and / or exclude any change in the seismic activity of this region of the country or of the volcano itself.

In addition to identifying the most likely scenarios and, moreover, facilitating the civil protection authorities and the Mexican government, taking measures to protect the communities surrounding this area of the country.

Source: SOBRE LA ACTIVIDAD EN LA REGIÓN DEL VOLCÁN CHICHONAL, CHIAPAS / Vulcanologia UNAM