Activity of Popocatépetl, Poas, Reventador, and seismic swarm in Tjörnes FZ.

During the past 24 hours, thanks to the monitoring systems of the Popocatépetl volcano, 69 exhalations have been detected accompanied by water vapor, volcanic gases and slight amounts of ash. Additionally, 37.5 minutes of shaking were recorded.

During the morning and until 11 a.m., it was not possible to observe the crater of the volcano continuously due to cloudy conditions in the region, however, some emissions were observed in a northwest direction.

CENAPRED urges not to approach the volcano and especially the crater, because of the danger of falling ballistic fragments and, in the event of heavy rains, to stay away from the bottom of the ravines because of the danger of lava flows. mud and rubbish.

The volcanic alert of Popocatépetl remains in Amarillo Fase 2

Sources : Cenapred & webcamsdeMexico

The thermal convection of the Laguna Caliente du Poas and the fumarolic degassing without eruptive activity are maintained.

Between 07:00 and 08:00 on September 11, very vigorous convection was observed around the new mouth on the north side of the lake.

Seismicity is maintained with a background tremor. The maximum SO₂ concentration observed at the belvedere was 3.4 ppm this morning. Gas ratios remain stable and no significant change in deformation behavior is observed.

The volcano shows slight but significant vertical uplift and some horizontal extension around the crater, which is more marked at the level of the GPS geodetic station in the visitors' building.

The Ovsicori observed an increase in volcanic activity, which may be a precursor to a period of phreatic eruption, as in 2019 or 2014. This change in activity occurs in a tectonic context with an earthquake in the subduction zone .

Activity Level: Warning (2)

Source: Ovsicori – Daily information and communication on a change in activity from 09.09

Reventador's surface and internal activity levels remain moderate, and unchanged.

Seismicity is characterized by 40 long-period earthquakes (LP), 49 explosion earthquakes (EXP), 15 episodes of emission tremor (TREMI), 3 episodes of harmonic tremor (TRARM)

On the morning of September 11, an emission of gas and ash from a height of 700 meters above the level of the crater in a northwest direction could be observed. No alert was recorded by the VAAC agency in Washington.

The FIRMS and MIROVA satellite systems have not recorded any thermal anomalies on the volcano in the past 24 hours. In the early hours of today, luminosity was observed in the crater. At the moment, the area is cloudy.

The state of the volcano's alert level - SNGRE: Orange

Source: IGEPN

Seismic disturbances have been occurring in the Tjörnes Fracture Zone since early September.
The Icelandic Meteorological Office (IMO) reported that more than 6,000 earthquakes have been recorded under the island of Grímsey so far, the strongest of which was detected with a magnitude M 4.9 on September 8 at 04:01. local time, widely felt in northern Iceland. .
The offshore Tjörnes Fracture Zone is an oblique transform zone that separates the volcanic zone of northern Iceland from the Kolbeinsey Ridge, which is part of the Mid-Atlantic Ridge in northern Iceland.

Source: IMO