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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

In the Vísir.is webcam you can see that the crater on the fissure at Meradalur has changed a lot in the last 24 hours ... without spectators due to the closure of the eruptive site. There have been collapses in the southeast corner of the crater, and a large chunk of the wall is now missing.

It is likely that the lava found a new exit from the crater, according to Eldfjalla- og náttúruvárhópur Suðurlands.

Meradalur - morphological evolution of the crater - webcam visit on 08.17.2022 / 4:51 p.m. - one click to enlarge

Meradalur - morphological evolution of the crater - webcam visit on 08.17.2022 / 4:51 p.m. - one click to enlarge

The Reykjanes eruption site is open on August 18. Please follow the instructions from www.safetravel.is regarding hiking.

The Meradalir eruption trails, which were closed yesterday due to a yellow weather warning, reopened to visitors this morning, RÚV reports.

Police arrested anyone trying to get to the eruption yesterday. According to RÚV, everyone respected the closure and no one tried to sneak into the area, unlike the last closure.

 

Matvælastofnun, the Icelandic Food and Veterinary Authority, warns hikers NOT to take their pets with them to the site of the eruption, as the stimuli can be stressful for dogs.
Additionally, rainwater in the area contains pollutants that can be harmful to dogs if ingested when drinking groundwater or licking their paws.

The Reykjanes eruption site is open today August 18. Please follow the instructions from www.safetravel.is regarding hiking. - one click to enlarge

The Reykjanes eruption site is open today August 18. Please follow the instructions from www.safetravel.is regarding hiking. - one click to enlarge

In recent days, the flow has been much lower than at the beginning. The number of volcanic eruptions has decreased and the lava flow is flowing less than before.

Eruption activity has changed, pulsatile activity has increased, and magma is being thrown higher into the air than before. So it's as if the eruption is entering into this cascading activity that the 2021 eruption entered into, says volcanologist Þorvaldur Þórðarson.

 

Sources: Safe Travel, RUV, Grapevine, Eldfjalla- og náttúruvárhópur Suðurlands.

Extent of Fagradalsfjall lava fields / 2021(yellow) vs. Meradalur lava field / 2022 (orange) - Doc. Geoviews / viewsoftheworld 17.08.2022 - one click to enlarge

Extent of Fagradalsfjall lava fields / 2021(yellow) vs. Meradalur lava field / 2022 (orange) - Doc. Geoviews / viewsoftheworld 17.08.2022 - one click to enlarge

The Servicio Geologico Columbiano recorded in Nevado del Ruiz on August 18 at 5:51 p.m., a seismic fluid circulation signal, associated with an emission of ash that reached a height of 3,200 m, in a vertical direction with a slight dispersion towards the west-northwest. This was visible from most cameras installed in the volcano area and from the city of Manizales. At the time of publication of this note, there are no reports of ashfall.

The activity level of the Nevado del Ruiz volcano remains at 3 / amarillo / changes in the behavior of volcanic activity.

 

Source: S.G.C.

Nevado del Ruiz - ash plume on 08.18.2022 / 5:51 p.m. - S.G.C. webcams

Nevado del Ruiz - ash plume on 08.18.2022 / 5:51 p.m. - S.G.C. webcams

On June 2, 7, and 12, Sentinel-2 infrared satellite data showed two thermal anomalies of varying intensities in the Erta Ale South Crater.

The August 16 Sentinel-2 image confirms thermal anomalies in both pit craters.

The lava lake continues to occupy the central part of the South Trench crater, erupting small lava fountains. Spatter continues to eject fragments of hot, juvenile, plastic lava, forming small stalactites at the bottom of the lava field.
Simultaneously, the northern pit crater began to form a steep-sided hornito/brittle spatter cone.

 

Sources: Sentinel-2 via Mounts Project, Volcanodiscovery (description of on-site activity)

Erta Ale - image Sentinel-2 bands 12,11,8A dated 08.16.2022 - via Mounts project - one click to enlarge

Erta Ale - image Sentinel-2 bands 12,11,8A dated 08.16.2022 - via Mounts project - one click to enlarge

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