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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

On 02/19/2022 at 4:12 a.m. local time, an eruptive episode is recorded at the level of the Turrialba volcano, with a column which rises 100 meters above the height of the crater and 3440 meters above the level of the sea. (meters above sea level) (11283.2 feet).
Duration of the activity: 1 minute. The winds are blowing west.
Ash falls and a smell of sulfur are reported in the Irazú Volcano National Park.

After the eruption, passive degassing resumed. The CO2/SO2 ratio showed a significant peak at values ​​of ~50 on February 14 and 15 and then decreased to values ​​of ~20 over the past few days. Another CO2/SO2 peak was observed about 2 hours before the eruption. CO2/SO2 spikes are usually associated with relatively high H2S/SO2 values.

Turrialba - small ash pulse on 02.19.2022 / 04:12 - Ovsicori webcam

Turrialba - small ash pulse on 02.19.2022 / 04:12 - Ovsicori webcam

On 02/19/2022 at 4:24 p.m. local time, another eruptive episode is recorded at the level of the Turrialba volcano, the height reached by the column is unknown due to the visibility conditions of the site.
Duration of the activity: 1 minute. The winds blow from the southwest.
This eruption was very small in terms of energy released (based on infrasound data)

 

Source: Ovsicori

Taal - summary of activity as of 02.20.2022 - Doc.Phivolcs

Taal - summary of activity as of 02.20.2022 - Doc.Phivolcs

In the past 24 hours, the Taal Volcano Network recorded 169 volcanic tremor events lasting between 2 and 16 minutes. Activity at the main crater was dominated by upwelling of hot volcanic fluids in its lake which generated 600 meter high plumes that drifted southwest. Sulfur dioxide emissions averaged 6,366 tonnes/day on February 18, 2022. Based on electronic tilt ground deformation parameters, continuous GPS and InSAR monitoring, Taal Volcano Island and Taal region began to deflate in October 2021.

Alert Level 2 (increased unrest) prevails over Taal Volcano. DOST-PHIVOLCS reminds the public that at Alert Level 2, sudden steam or gas explosions, volcanic earthquakes, minor ashfall, and lethal accumulations or expulsions of volcanic gas may occur and threaten areas in and around TVI. DOST-PHIVOLCS strongly recommends that entry to Taal Volcano Island, Taal Permanent Danger Zone or PDZ be strictly prohibited, especially around the Main Crater and Daang Kastila Fissure, and extended stays on the Taal Lake.

 

Source: Phivolcs

Sangay - thermal anomalies on 02.20.2022 / 04:15 - Doc. Mirova _MODIS_Latest10NTI

Sangay - thermal anomalies on 02.20.2022 / 04:15 - Doc. Mirova _MODIS_Latest10NTI

In Ecuador, VAAC Washington reported 2 ash and gas emissions at 1,470 meters and 1 ash emission at 1,170 meters at the Sangay volcano; the 3 broadcasts in a southeasterly direction.

Seismicity is characterized by 14 explosion earthquakes, 16 LP earthquakes.
FIRMS records 5 thermal alerts in the last 24 hours.

In the event of heavy rains, the volcanic materials could be remobilized, and generate lahars and debris flows in the drainages.

Reventador - IGEPN webcam from 18.02.2022 / 23:27 UTC

Reventador - IGEPN webcam from 18.02.2022 / 23:27 UTC

In Reventador (Ecuador), the explosive activity continues.
On February 18 during the afternoon, several gas and ash emissions were observed, up to 1,000m. Asl. , in a northwesterly and westerly direction. The VAAC Washington also reported 2 ash emissions at 1,338 meters high and 1 emission at 988 meters, the 3 emissions in a southeasterly direction.
MIROVA records 1 low thermal alert in the last 24 hours.
Yesterday afternoon, the volcano partially cleared and gas emission was observed,
In addition, during the night hours, an incandescence was observed at the level of the crater.

Seismicity is characterized by 14 explosion earthquakes, 45 LP earthquakes and 3 episodes of harmonic tremor.
Alert level - SNGRE: Orange

 

Source: IGEPN

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