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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 eruption / Nátthaga Valley - incandescence on the flow on 06/01/2021 / 00:35 - webcam_slaga Norðnorðaustur - one click to enlarge

Fagradalsfjall eruption / Nátthaga Valley - incandescence on the flow on 06/01/2021 / 00:35 - webcam_slaga Norðnorðaustur - one click to enlarge

Fagradalsfjall eruption / Nátthaga Valley - the flow on 01.06.2021 / 10:36 - webcam_slaga Norðnorðaustur

Fagradalsfjall eruption / Nátthaga Valley - the flow on 01.06.2021 / 10:36 - webcam_slaga Norðnorðaustur

In the Reykjanes peninsula, the Fagradalsfjall eruption does not show significant changes; lava continues to seep into Meradalur - both Meradali and Syðri-Meradali - and into the Nátthaga Valley, a phenomenon visible especially in low light hours.

Respect for the new forbidden zone (observation point which threatens to be surrounded) is not always respected. The police will crack down in the event of an offense, because the only means of rescue is the helicopter, which has a very expensive hourly cost. The Coast Guard did exercises there.

 

Sources: RUV & Visir

Fagradalsfjall - Lava field and danger of closure of the viewpoint (black circle) - map 05.31.2021

Fagradalsfjall - Lava field and danger of closure of the viewpoint (black circle) - map 05.31.2021

Fagradalsfjall - Coast Guards training above the observation point, with the active vent in the background - photo Icelandic Coast Guards 05.31.2021

Fagradalsfjall - Coast Guards training above the observation point, with the active vent in the background - photo Icelandic Coast Guards 05.31.2021

May 2021 was marked by the continuation of the Piton de La Fournaise eruption, which began on April 9, 2021 until May 24 (2:00 a.m. local time), when it stopped.

The eruption emitted a total volume of surface lava of about 13 million cubic meters.

The building's inflation and the CO2 levels in the soil, which remained high in May 2021, witnessed magmatic transfers from deep areas to the superficial magmatic reservoir. This recharge explains the continuation of the eruption from April 9 until May 24, 2021 (02:00 local time, 23 May 22:00 UTC). Since the end of the eruption, the inflation (swelling) of the volcanic edifice has continued, indicating that the superficial magmatic reservoir is still pressurized.

 

Source: OVPF monthly bulletin

Piton de La Fournaise - Illustration of the deformation over 2 months (02.04 / 02.06.2021) The baselines (variation in distance between two GPS receivers) crossing the Piton de la Fournaise building, at vertex (above), at the base of the terminal cone (in the middle) and in the far field (below) (cf. location on the associated maps). An increase is synonymous with elongation and therefore swelling of the volcano; conversely, a decrease is synonymous with contraction and therefore deflation of the volcano. Any periods colored in light pink correspond to eruptions. - Doc. OVPF

Piton de La Fournaise - Illustration of the deformation over 2 months (02.04 / 02.06.2021) The baselines (variation in distance between two GPS receivers) crossing the Piton de la Fournaise building, at vertex (above), at the base of the terminal cone (in the middle) and in the far field (below) (cf. location on the associated maps). An increase is synonymous with elongation and therefore swelling of the volcano; conversely, a decrease is synonymous with contraction and therefore deflation of the volcano. Any periods colored in light pink correspond to eruptions. - Doc. OVPF

Piton de La Fournaise - activity from 04.05.2021 / OVPF

Piton de La Fournaise - activity from 04.05.2021 / OVPF

Piton de La Fournaise - 19.05.2021 / 09:06 UT - webcam Piton de Bert 4 / OVPF

Piton de La Fournaise - 19.05.2021 / 09:06 UT - webcam Piton de Bert 4 / OVPF

In Peru, the Sabancaya maintained moderate activity during the week of May 24 to 30, 2021. An average of 90 explosions is observed daily, which are accompanied by plumes of ash and gas up to 2,500 meters above the summit. .

During this period, I.G. Peru detected 707 earthquakes of volcanic origin, associated with the circulation of magmatic fluids. The VT earthquakes, in connection with the fracturing of rocks, mainly concern the northeast and the east of the volcano. No significant deformation anomalies, and three thermal anomalies of VRP max. of 14 MW, associated with the presence of a surface lava body in the crater.

The volcanic alert level remains at Naranja, with a 12 km radius no-go zone.

 

Source: I.G. Peru

Sabancaya - activity of the week from 24 to 30.05.2021 - Doc. I.G. Peru

Sabancaya - activity of the week from 24 to 30.05.2021 - Doc. I.G. Peru

Sabancaya - thermal anomaly - Sentinel-2 band image 12.11.8A from 05.29.2021 - one click to enlarge

Sabancaya - thermal anomaly - Sentinel-2 band image 12.11.8A from 05.29.2021 - one click to enlarge

The image taken on May 29 shows the new look of La Soufrière, Saint-Vincent on the leeward (west) side.

Professor Robertson tagged the photo so we can notice the 1812 crater with its lake, the 1979 crater rim, the 2021 explosion crater, and the lowest point along the rim: the Larakai Gap. It can be noted that a lake is still present in the same place before this eruption.

The alert is still in Orange and access to the volcano is still prohibited for the moment.
 

Source: UWI-SRC

Soufrière de St. Vincent - the summit new look  - photo 29.05.2021 Francesco Gomez & Sandra Montabard, captions Prof. Robertson

Soufrière de St. Vincent - the summit new look - photo 29.05.2021 Francesco Gomez & Sandra Montabard, captions Prof. Robertson

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