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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

A new study of lava was carried out in the Reykjanes Peninsula today, April 6, using vertical aircraft photogrammetry.

The results indicate that the lava flow is very weak in Geldingadalir and that the average flow since yesterday in the new crack is 4-5 m3 / s. The total flow is estimated at 5-6 m3 / s. Apparently, the increase seen yesterday was temporary. The intensity of the rash is therefore similar to what it was in the days before the new crack opened.

Reykjanes Peninsula - surface parameters, quantities of lava emitted, emission velocity ratio and lava composition - doc. Univ. Iceland 04/06/2021 / 1:18 p.m.

Reykjanes Peninsula - surface parameters, quantities of lava emitted, emission velocity ratio and lava composition - doc. Univ. Iceland 04/06/2021 / 1:18 p.m.

A third crack opened at midnight between the two eruptive sites in Reykjanes, according to Einar Hjörleifsson, a nature conservation expert at the Icelandic Meteorological Office. The new crack opened directly in front of the web camera, 420 meters north of the spring in Geldingadalur.

Rescue teams saw a landslide in the area yesterday, which was about 150 m long and about 1 meter deep, likely location of the new activity.
Lava flows from the new fissure towards Geldingadalur.

Geldingadalur - 3rd crack zone (left), with flow towards Gelingadalur - RUV webcam 04/07/2021 / 00h52

Geldingadalur - 3rd crack zone (left), with flow towards Gelingadalur - RUV webcam 04/07/2021 / 00h52

Reykjanes peninsula - new crack opened on 04/06/2021 around midnight between the 2 eruptive sites - photo frettabladid.is

Reykjanes peninsula - new crack opened on 04/06/2021 around midnight between the 2 eruptive sites - photo frettabladid.is

Davíð Már Stefánsson, Information Officer for Landsbjörg, announced earlier today that it has been decided to expand the danger zone, as there are now eruption sites in two places and cracks between both.
The area is closed until a new assessment.

 

Sources: IMO, RUV, mbls, Visir, Frettabladid

Reykjanes Peninsula - Possible lava flow path if the eruption lasts longer (4-5 months to overflow from Meradalir according to Prof. Magnús Tumi Guðmundsson) - Doc. via Oroapuls April 2021

Reykjanes Peninsula - Possible lava flow path if the eruption lasts longer (4-5 months to overflow from Meradalir according to Prof. Magnús Tumi Guðmundsson) - Doc. via Oroapuls April 2021

Continuous high activity in Pacaya, with an effusive predominance; the western lava flow continues its course, 3,000 meters long on April 6 around 3 pm, in the vicinity of the communities of El Patronicio and El Rodeo. Its direction varies according to the topography; it has formed several ramifications. The flows cause fires in vegetation and crops, the destruction of buildings and the cutting of the paths. avalanches of boulders mark the flow front, as well as a degassing charged with sulfur dioxide dangerous for the respiratory system.

Pacaya - RSAM from 31.03 to 06.04.2021 - Doc. Insivumeh

Pacaya - RSAM from 31.03 to 06.04.2021 - Doc. Insivumeh

The few explosions at Mackenney crater expel incandescent materials over 100 meters and generate ash plumes reaching 3,700 meters asl., and constant falls on communities located to the south and southeast of the volcano.

The observed variations in seismic parameters are consistent with the periods of greatest activity at the Mackenney crater and the cracks that feed the flows.

 

Source: Insivumeh - 06.04.2021 / 3 p.m. local

Veniaminof - photo archives AVO / Jacob ben David 11.03.2021

Veniaminof - photo archives AVO / Jacob ben David 11.03.2021

Likely low level ash emissions were observed in web camera views from the summit of Veniaminof. Seismic activity remains high. Due to the renewed activity, AVO is raising the Aviation Color Code to ORANGE and the Volcano Alert Level to Watch. The Alaska Volcano Observatory continues to monitor Veniaminof with a local seismic network, remote infrasound and lightning networks, as well as satellite and webcam images.

Eruptive activity at Veniaminof typically consists of minor ash emissions, lava fountains, and lava flows from the small cone in the summit caldera.

Source: AVO

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