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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
  Nyiragongo - fissure eruption of 05.22.2021 - photo Imfurayacu J-L / Twitter

 Nyiragongo - fissure eruption of 05.22.2021 - photo Imfurayacu J-L / Twitter

An eruption started on May 22, 2021 around 5:15 p.m. UTC in Nyiragongo / DRC. A strong thermal anomaly suddenly appeared, spotted by the Meteosat satellite.

The new eruptive fissure vent on the eastern flank, towards Mujoga, as reported by observers, feeds rapid lava flows that continue to advance towards Busambali, Byungo, Mudja province, including the capital of Goma, and should threaten populated areas.

The lava, after having burned the cemeteries of Makao, entered the city of Goma, really in the North, consuming a few houses and causing too many displaced people.

Strong fumes emanate from the rocky lava front, blackish and still unstable, located exactly in the suburb of Buhene. The airport, located a few hundred meters away, was spared.

Nyiragongo - image Sentinel-2 bands 12.11 8A from 22.05.2021 / 8:06 am - via Mounts project

Nyiragongo - image Sentinel-2 bands 12.11 8A from 22.05.2021 / 8:06 am - via Mounts project

Nyiragongo -22.05.2021 / 8:30 am - Sentinel-2 bands 12,11,8A & MIROVA Modis thermal volcanic activity _Last

Nyiragongo -22.05.2021 / 8:30 am - Sentinel-2 bands 12,11,8A & MIROVA Modis thermal volcanic activity _Last

Rubavu District Mayor Gilbert Habyarimana said some residents of Goma, Democratic Republic of Congo have started arriving in #Rwanda, fleeing the eruption of Nyiragongo volcano. He says local authorities have drawn up an emergency plan to help them.

At around 9 a.m. UTC, the media announced a halt to the lava flow north of Goma. The inhabitants are already returning to the city.

 

Sources: Ch.Balagizi / Goma volcano observatory & Local and international press and media agencies.

Fagradalsfjall eruption - 21.05.2021- the level of the lava at the level of the dam suggests the rest - photo mbl.is - Unnur Freyja

Fagradalsfjall eruption - 21.05.2021- the level of the lava at the level of the dam suggests the rest - photo mbl.is - Unnur Freyja

Fagradalsfjall eruption - 22.05.2021 - The lava flow has passed the dam and is heading towards the Nátthaga valley - RUV photo

Fagradalsfjall eruption - 22.05.2021 - The lava flow has passed the dam and is heading towards the Nátthaga valley - RUV photo

Fagradalsfjall eruption - 22.05.2021 - rapid descent of lava towards Nátthaga, favored by the  difference in height - photo Visir

Fagradalsfjall eruption - 22.05.2021 - rapid descent of lava towards Nátthaga, favored by the difference in height - photo Visir

In the Reykjanes Peninsula, lava started flowing into Nátthaga on May 22, 2021 despite dams put in place to prevent lava from flowing into Nátthaga and Suðurstrandarvegur. (see yesterday's article)

Elvar Þór Ólafsson is a big fan of eruptions. He captured videos of the lava flowing in Nátthaga. As can be seen in the video below, the lava flowed towards Nátthaga with considerable speed and was accompanied by great heat.

Fagradalsfjall -Nátthaga valley- 05/22/2021 / at 12:04 p.m. and 5:23 p.m. - webcam Slaga - Norðnorðaustur
Fagradalsfjall -Nátthaga valley- 05/22/2021 / at 12:04 p.m. and 5:23 p.m. - webcam Slaga - Norðnorðaustur

Fagradalsfjall -Nátthaga valley- 05/22/2021 / at 12:04 p.m. and 5:23 p.m. - webcam Slaga - Norðnorðaustur

Fagradalsfjall -Nátthaga valley- 05/22/2021- Lava flows & lava fields map - Doc. via RUV

Fagradalsfjall -Nátthaga valley- 05/22/2021- Lava flows & lava fields map - Doc. via RUV

Hörn Hrafnsdóttir, an environmental and civil engineer, said in a conversation with the news agency this morning that it was likely that it would take a few weeks for lava to flow over Suðurstrandarvegur and that it was possible to put in place defenses at the bottom of Nátthaga to try. to prevent lava flow on Suðurstrandarvegur.

Source: RUV

Fagradalsfjall -Nátthaga valley- 23.05.2021 / at 2:51 am and 3:22 am - webcam Slaga - Norðnorðaustur
Fagradalsfjall -Nátthaga valley- 23.05.2021 / at 2:51 am and 3:22 am - webcam Slaga - Norðnorðaustur

Fagradalsfjall -Nátthaga valley- 23.05.2021 / at 2:51 am and 3:22 am - webcam Slaga - Norðnorðaustur

At Etna, this May 22, 2021 from 17:30 UTC, an increase in the amplitude of the volcanic tremor is observed, which is currently on average values. An increase in the explosive activity of the southeast crater is observed. The current Strombolian activity is accompanied by an abundant emission of ash. The forecast model indicates the dispersion of the eruptive cloud to the east.
In its report of May 22 at 20:39 UTC, the INGV indicates that Strombolian activity at the southeast crater has turned into a lava fountain. The forecast model indicates the dispersion of the eruptive cloud in the ENE direction.

Beautiful lava fountains up to 500 m high are described and a small lava flow on the upper southwest flank.
The volcanic tremor is still increasing to very high values. The sources of the tremor are located near the SE crater. at a depth of approximately 2.8 km above sea level.
The rate of occurrence of infrasonic events is very high.
At 22:38 UTC, the lava fountain is over. The forecast model indicates the dispersion of the eruptive cloud to the east.

Etna SEC - Activity from 05/22/2021 / 8:30 p.m. - EMOT / INGV OE webcam

Etna SEC - Activity from 05/22/2021 / 8:30 p.m. - EMOT / INGV OE webcam

Etna SEC - beautiful lava fountains 500 m high. - photo Boris Behncke

Etna SEC - beautiful lava fountains 500 m high. - photo Boris Behncke

Etna - trémor at 23.05.2021 / 07h - Doc. INGV OE

Etna - trémor at 23.05.2021 / 07h - Doc. INGV OE

From 01:51 UTC to 23.05.2021 through surveillance cameras, the resumption of explosive activity at the southeast crater with emission of ash was observed.
This activity lasted continuously until approximately 02:03 UTC. Currently, discontinuous intracrateric explosions are observed with low ash emissions which disperse rapidly. The forecast model indicates the dispersion of the eruptive cloud towards E.
Between 01:30 and 02:15 UTC, the amplitude of the volcanic tremor recorded a sudden increase and a subsequent decrease in accordance with volcanological observations. Infrasound activity remained at low levels, both in the rate of occurrence and in the energy of events.

 

Source: INGV OE

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