Mount Etna may represent a previously unknown type of volcano. Researchers suggest its magma rises from pockets nearly 80 km deep, challenging the classic 3-category view of volcanism and reshaping how scientists think about mantle dynamics.

🔗 https://phys.org/news/2026-04-mount-etna-volcano-kilometer-deep.html

#Volcanology #Geophysics #EarthScience #Magma #Physics

Mount Etna breaks volcano rules, tapping 80-kilometer-deep magma in a rare fourth category of eruption

Located in Sicily, Mount Etna is Europe's most active volcano. Yet its origin remains largely enigmatic, as no existing geological model fully explains how it formed. In a new study, scientists from the University of Lausanne (UNIL) shed light on these mechanisms and reveal why Mount Etna may in fact be unique in the world.

Phys.org
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L'oblungo mare solidificato che proietta lo Zimbabwe negli spazi tecnologici del nostro domani

Vedere il globo terracqueo come un gigantesco essere biologico non significa per forza o necessariamente attribuirgli le caratteristiche di una creatura in base ai crismi che da sempre ben conosciamo. Aspetti come arti, occhi, un naso ed una bocca, aspirazioni o sentimenti del vivere quotidiano. Il

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Nous Ă©voquons rĂ©guliĂšrement l’inflation (ou gonflement) d’édifices volcaniques. Ces mouvements de la surface traduisent des processus en profondeur, en particulier une augmentation de la pression dans un rĂ©servoir magmatique – ce qui ne prĂ©sage pas forcĂ©ment d’une Ă©ruption prochaine. La surveillance volcanique montre parfois le phĂ©nomĂšne inverse. C’est le cas de deux volcans du massif du Tibesti (Tchad), oĂč les donnĂ©es d’interfĂ©romĂ©trie radar capturĂ©es par le satellite europĂ©en Sentinel-1 mettent en Ă©vidence une dĂ©flation (ou subsidence). Au Tarso ToussidĂ©, le sol s’est affaissĂ© de 2,2 mm par an sur la pĂ©riode considĂ©rĂ©e (2017–2021). Au Tarso Voon le mouvement est plus marquĂ© : 8,5 mm/an. Il est aussi lĂ©gĂšrement excentrĂ©, non pas Ă  l’aplomb de la caldeira mais au nord-ouest, sous le vaste champ hydrothermal Soborom. Dans les deux cas, cette subsidence est interprĂ©tĂ©e comme rĂ©sultant de la contraction thermique d’une source magmatique, localisĂ©e Ă  7,6 et 5 kilomĂštres de profondeur, respectivement. Autrement dit, il reste du magma sous ces volcans, mais il serait plutĂŽt en train de refroidir et de cristalliser. Une inflation dĂ©tectĂ©e dans le Trou au Natron, au sud-est du ToussidĂ©, serait quant Ă  elle un signal parasite gĂ©nĂ©rĂ© par les variations d’humiditĂ© dans les dĂ©pĂŽts salins qui tapissent le cratĂšre, et non la consĂ©quence d’une activitĂ© magmatique. MĂȘme s’ils n’ont aucune Ă©ruption historique connue, quatre volcans du Tibesti sont considĂ©rĂ©s comme actifs au cours de l’HolocĂšne. D’aprĂšs cette Ă©tude (https://doi.org/10.1007/s00445-026-01954-0), ils pourraient ĂȘtre en train de s’assoupir.
#Tchad #Tibesti #volcan #magma #satellite #déformation
Magma - Zombies - Live @ Jazz à Vienne

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MĂ«kanĂŻk DĂ«struktĂŻáș Kömmandöh (en vivo '77)

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Magma - Hhai Live 1978 (Best Version)

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