L’épisode 17 de l’éruption du Kilauea dans le cratère de l’Halema’uma’u s’est terminé le 9 avril 2025 à 9h45 (heure locale), lorsque les fontaines de lave ont cessé de jaillir de la bouche éruptive sud, avec des hauteurs de 15 à 60 mètres, bien inférieures à celles des épisodes précédents. L’épisode 17 a duré 35 heures et demie. Les deux bouches éruptives se contentent de dégazer en ce moment? Seule la bouche sud montre de l’incandescence pendant la nuit. Si l’activité éruptive reprend comme avant l’Épisode 17, l’épisode 18 devrait commencer dans les prochains jours.
L’USGS a mis en ligne une bonne vidéo de l’Épisode 17, filmée depuis un hélicoptère. On remarquera la vitesse à laquelle la lave fluide et très chaude émerge de la bouche sud avant de se répandre sur le plancher du cratère de l’Halema’uma’u qu’elle a recouvert sur 40 à 50 %.
https://usgs-ocapsv2-public-input-media.s3.us-west-2.amazonaws.com/assets/palladium/production/s3fs-public/media/video/multimediaFile-4363.mp4
Capture d’écran de l’Épisode 17
Les images des webcams montrent que l’Épisode 18 ne devrait pas tarder…
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Episode 17 of the Kilauea eruption in Halemaʻumaʻu Crater ended at 9:45 a.m. (local time) on April 9th, 2025 when low fountaining at the south vent stopped. They sustained heights of 15-60 meters and were much lower than during the past episodes. Overall, episode 17 lasted 35.5 hours. Both vents in the crater are now degassing but only the south vent is glowing at night. If the eruptive activity reverts to pre-episode 17 behaviour, HVO data indicate that episode 18 is likely to begin in the next few days.
USGS has released a good video of Episode 17 shot from a helicopter. One can notice how fast the fluid and so very hot lava is emerging drom tha south vent and sptreading across the Halema‘uma‘u crater floor. The lava flows covered over 40-50% of the floor.
The current webcam images show that Episode 18 is in the making…
L’éruption se poursuit sur la péninsule de Reykjanes dans une zone au nord-est de Stóra-Skógfell.
The eruption continues on the Reykjanes Peninsula in an area northeast of Stóra-Skógfell. The activity is now limited to a very active eruptive center in the northern part of the fissure that opened on the evening of August 22nd, 2024. Observations are made by helicopter and drone. Access to the area on foot is almost impossible and prohibited by the police ; in any case, the smoke from the vegetation fires considerably hinders the view of the eruption site. From the sky, one can see a magnificent lava fountain in the most active vent of the edifice that is being built day after day. The lava is heading northwest in two well-fed flows. Its fluidity shows that its temperature is probably very high and that it comes from a great depth.
Claude Grandpey : Volcans et Glaciers 