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Earth of fire

Actualité volcanique, Articles de fond sur étude de volcan, tectonique, récits et photos de voyage

Publié le par Bernard Duyck
Publié dans : #volcanic activity
St-Vincent - the new dome of the Soufrière in slight growth on 12/30/2020 - aerial surveillance NEMO

St-Vincent - the new dome of the Soufrière in slight growth on 12/30/2020 - aerial surveillance NEMO

Although there have been no significant changes over the past 24 hours at Soufrière de St -Vincent, materials and magma continue to accumulate on the surface with no associated seismic activity. The construction of the Dome continues, its size is seen slightly larger than on December 29, during the monitoring of the volcano by aerial surveillance.

The alert level remains at Orange - high fumarolic activity. All residents living in communities closer to the volcano (red and orange zones) are asked to be on alert for any increased activity.

 

Sources: NEMO & UWI

Soufrière de St-Vincent - map of risk areas - Doc. UWI

Soufrière de St-Vincent - map of risk areas - Doc. UWI

Soufrière of St-Vincent - some dates which mark out its erutive history which can be explosive or effusive (as today) - Doc. UWI research center

Soufrière of St-Vincent - some dates which mark out its erutive history which can be explosive or effusive (as today) - Doc. UWI research center

The lava lake of Kilauea has changed little in recent days: Erupting lava at the active west vent flows along the lava channel encrusted for the most part over 130 feet in the surface of the lava lake, while in At the top of the fissure, the vents cycle between weak lava fountains and periods of strombolian activity, exhibiting spattering.

The lava lake has a depth of 181 meters, for a volume of about 23 million m³. Sulfur dioxide emissions have fallen a little (3,300 tonnes / day), but still remain high.

A slight deflationary signal is observed on 30 december, while the seismicity is high and stable, marked by a large tremor and some minor earthquakes.

 

Sourecs: HVO-USGS, & Hawaii tracker

Kilauea - Halema'uma'u lava lake on 12/29/2020 / 4 p.m., showing declining outgassing, and a rainbow stump; to note: crater rim drive cut dead by the 2018 collapse - photo C. Parcheta / USGS

Kilauea - Halema'uma'u lava lake on 12/29/2020 / 4 p.m., showing declining outgassing, and a rainbow stump; to note: crater rim drive cut dead by the 2018 collapse - photo C. Parcheta / USGS

Kilauea - Halema'uma'u lava lake on 12/30/2020 - Strombolian activity and lava effusion, encrusted - USGS photo by H. Dietterich.

Kilauea - Halema'uma'u lava lake on 12/30/2020 - Strombolian activity and lava effusion, encrusted - USGS photo by H. Dietterich.

Kilauea - thermal anomalies remain high as of 12/31/2020 - Doc. Mirova_MODIS_Latest10NTI

Kilauea - thermal anomalies remain high as of 12/31/2020 - Doc. Mirova_MODIS_Latest10NTI

During the last 24 hours, thanks to the monitoring systems of the Popocatépetl volcano, 39 exhalations and 1070 minutes of tremor have been identified, accompanied by emissions of volcanic gases and ash, sometimes the column had a maximum height of 1000 m and was dispersed mainly to the northeast

In the morning, emissions of volcanic gases and ash are observed, which disperse to the northeast.

CENAPRED urges not to approach the volcano and especially the crater, because of the danger posed by the fall of ballistic fragments (image 4) and, in the event of heavy rains, to stay away from the bottom of the ravines due to the the danger of mudslides and garbage.

The Popocatépetl volcanic alert semaphore is at amarillo Fase 2.

Popocatépetl - The plume of gas and ash illuminated by the sun on 12/30/2020./ 7:07 a.m. - Doc. webcamsdeMexico

Popocatépetl - The plume of gas and ash illuminated by the sun on 12/30/2020./ 7:07 a.m. - Doc. webcamsdeMexico

Cenapred presented a summary table of Popocatépetl activity in 2020.

It should be noted that at the end of December, the number of exhalations is decreasing, while we observe an increase in the number of explosions. ((2 reported in the report of 23.12, 1 on 27 and 28.12, 3 on 29.12), and ash emissions.

 

Sources: Cenapred and webcams of Mexico

Popocatépetl - Activity report in 2020 - Doc. Cenapred / CNPC / Gobierno de Mexico

Popocatépetl - Activity report in 2020 - Doc. Cenapred / CNPC / Gobierno de Mexico

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