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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
 Fagradalsfjall vent 5 - 07.10.2021 / 10:17 pm - Visir webcam

 Fagradalsfjall vent 5 - 07.10.2021 / 10:17 pm - Visir webcam

Status of current activity in Fagradalsfjall :
On the night of July 10 to 11, the eruptive activity gradually increased again. The episodic trend has resumed, with pulsating lava fountains lasting 6 to 8 minutes and intervals between each episode of around 5 to 6 minutes at the moment. (Volcano Chaser).

This activity continues this July 11 in the early hours, according to the images of webcams.

 

Sources: RUV, mbls, Almannavarnir, Volcano Chaser

Fagradalsfjall - tremor at 11.07.2021 - Doc. Hraun.vedur

Fagradalsfjall - tremor at 11.07.2021 - Doc. Hraun.vedur

Fagradalsfjall - 07.11.2021 / 03:45 - view from Natthaga valley  / webcam_slaga NNA

Fagradalsfjall - 07.11.2021 / 03:45 - view from Natthaga valley / webcam_slaga NNA

Fagradalsfjall - 07.11.2021 / 04:20 - webcam_langihryggur NV

Fagradalsfjall - 07.11.2021 / 04:20 - webcam_langihryggur NV

Fagradalsfjall - vent # 5 07.11.2021 / 06:30 - RUV webcam

Fagradalsfjall - vent # 5 07.11.2021 / 06:30 - RUV webcam

The monitoring stations installed near the CV Nevados de Chillán recorded this Saturday, July 10, at 8:33 am and 9:05 am, 2 earthquakes associated with fluid dynamics within the volcanic system (Long Period).

Stay in alert  Amarilla level

 

Source: Sernageomin

Nevados de Chillán - 2021.07.10 / 12:33 UTC- webcam Portezuelo / Sernageomin

Nevados de Chillán - 2021.07.10 / 12:33 UTC- webcam Portezuelo / Sernageomin

Over the past 24 hours, the Taal volcano network has recorded:

- 74 volcanic earthquakes, including thirteen (13) low frequency volcanic earthquakes,

- and 61 volcanic tremor events with durations of 1 to 25 minutes

- and a low-level background tremor that has persisted since July 7, 2021.

A phreatomagmatic episode occurred at the main crater of Taal at 11:56 a.m. on July 10, which generated a dark gray plume of 200 meters, captured by the main crater's IP camera.

High levels of volcanic sulfur dioxide emissions and vapor-rich plumes that rose one thousand (1000) meters before drifting west-northwest and southwest were generated from the crater principal of Taal. Sulfur dioxide emissions averaged 6,488 tonnes / day on July 10, 2021.

Based on ground deformation parameters from electronic tilt, continuous monitoring by GPS and InSAR, Taal Volcano Island began to deflate in April 2021 as the Taal region continues to undergo expansion very slow since 2020.

Alert level 3 / magmatic unrest now prevails over Taal volcano.

 

Sources: Phivolcs

Taal - activity summary as of 11.07.2021 - level 3 alert - Doc. Phivolcs

Taal - activity summary as of 11.07.2021 - level 3 alert - Doc. Phivolcs

The explosive eruption of Suwanosejima volcano in the Ryukyu Archipelago continues and has remained essentially unchanged at nearly constant levels.
Surveillance cameras from the Japan Meteorological Agency (JMA) observed a volcanic-type explosion at 11:44 a.m. local time today, July 11. An ash plume rose to an altitude of 6,900 feet (2,100 m).

Volcanic ash has scattered northeast of the crater, and within an hour a fairly large amount of ash is reported in Toshima village, as is ashfall in Kagoshima Prefecture.
An almost constant glow in the Ontake crater suggests that the flow of magma is increasing inside the building.

The explosions continue to generate pyroclastic bombs and boulders which are ejected up to 800 meters from the crater towards the northwest.


The warning bulletin indicates that the ballistic impacts of the volcanic bombs could affect an area approximately 2 km away from the main crater.

 


Source: JMA July 11, 2021 / 11:53 a.m.

Suwanosejima - 2021.07.11 / 11:48 loc - webcam JMA

Suwanosejima - 2021.07.11 / 11:48 loc - webcam JMA

A little activity seems to resume in Nishinoshima in this month of July, during which Mirova recorded weak to moderate thermal anomalies, of VRP between 2 and 41 MW (more precisely of VRP 41 MW on July 10, and 11 to 25 MW July 11).

 

Nishinoshima is on alert 3 / near crater warning.

 

Sources: JMA & Mirova

Nishinoshima - moderate thermal anomalies at 07.11.2021 / 03:20 - Doc. Mirova

Nishinoshima - moderate thermal anomalies at 07.11.2021 / 03:20 - Doc. Mirova

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