{"id":11414,"date":"2026-09-23T22:17:19","date_gmt":"2026-09-23T20:17:19","guid":{"rendered":"https:\/\/www.mission-1ocean.com\/?page_id=11414"},"modified":"2026-09-24T13:09:44","modified_gmt":"2026-09-24T11:09:44","slug":"20-000-volcans-sous-les-mers","status":"publish","type":"page","link":"https:\/\/www.mission-1ocean.com\/en\/20-000-volcans-sous-les-mers\/","title":{"rendered":"20 000 volcans sous les mers"},"content":{"rendered":"<p class=\"wp-block-paragraph\">Une mission aux portes des entrailles de la Terre, en qu\u00eate de l&rsquo;origine de la vie.<\/p>\n\n\n\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-0e47273b wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<figure class=\"wp-block-video\"><video height=\"1080\" style=\"aspect-ratio: 1920 \/ 1080;\" width=\"1920\" autoplay loop muted src=\"https:\/\/www.mission-1ocean.com\/wp-content\/uploads\/2022\/12\/BANDEAU_Volcans_DEF.mp4\" playsinline><\/video><\/figure>\n<\/div>\n<\/div>\n\n\n\n<p class=\"wp-block-paragraph\">Depuis 2021, l\u2019activit\u00e9 du volcan Stromboli a redoubl\u00e9 d\u2019intensit\u00e9, g\u00e9n\u00e9rant des \u00e9boulements et d\u2019\u00e9pais nuages de fum\u00e9e qui alertent les sp\u00e9cialistes. Premier t\u00e9moin de l\u2019activit\u00e9 volcanique intense dans les \u00eeles \u00c9oliennes, le Stromboli est l\u2019un des deux derniers volcans terrestres actifs de l\u2019archipel sicilien. Toutefois, nombre de ses semblables se cachent sous la surface. D\u2019apr\u00e8s les estimations de la NASA, les fonds marins comptent plus d\u2019un million de volcans, soit 80% du total de la plan\u00e8te.<\/p>\n\n\n\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-0e47273b wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:66.66%\">\n<h3 class=\"wp-block-heading\"><strong>PLONG\u00c9E DANS LES \u00ceLES \u00c9OLIENNES, AU COEUR DE L\u2019UN DES PLUS IMPORTANTS SYST\u00c8MES VOLCANIQUES D\u2019EUROPE<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">L\u2019archipel des \u00eeles \u00e9oliennes est compos\u00e9 de 7 \u00eeles principales : Alicudi, Filicudi, Lipari, Panarea, Salina, Stromboli et Vulcano. Situ\u00e9 au nord des c\u00f4tes siciliennes, il s\u2019inscrit dans un vaste syst\u00e8me volcanique comprenant \u00e9galement les volcans du sud du bassin Tyrrh\u00e9nien dont font notamment partie le V\u00e9suve et l\u2019Etna. Class\u00e9es Patrimoine Mondial de l\u2019UNESCO, les \u00eeles \u00c9oliennes accueillent l\u2019une des concentrations volcaniques les plus importantes du vieux continent.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Bien qu\u2019invisibles depuis la surface, les volcans sont \u00e9galement tr\u00e8s actifs en profondeur. Au printemps 2022, une mission d\u2019exploration 1 OCEAN est organis\u00e9e pour explorer la caldeira sous-marine de Panarea. Elle accompagne une mission scientifique de l\u2019INGV (Institut National de G\u00e9ophysique et de Volcanologie) men\u00e9e par le volcanologue Francesco Italiano.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">La premi\u00e8re plong\u00e9e est \u00e9poustouflante : \u00e0 seulement quelques m\u00e8tres de profondeur, des \u00e9ruptions permanentes de gaz venant directement de la chambre magmatique du volcan s\u2019\u00e9chappent des entrailles de la Terre pour former d\u2019impressionnants rideaux de bulles. Dans la caldeira, certains sites d\u00e9gagent plus d\u2019un million de litres de gaz par jour.<\/p>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:33.33%\">\n<div class=\"wp-block-group is-layout-grid wp-container-core-group-is-layout-2d5b96e5 wp-block-group-is-layout-grid\">\n<div class=\"wp-block-group has-white-color has-secondary-background-color has-text-color has-background is-layout-flow wp-block-group-is-layout-flow\" style=\"border-radius:20px;padding-top:50px;padding-right:50px;padding-bottom:50px;padding-left:50px\">\n<p class=\"has-text-align-center wp-block-paragraph\">Cette mission a \u00e9t\u00e9 r\u00e9alis\u00e9e avec le partenariat de l\u2019UNESCO, Sony, L&rsquo;Istituto Nazionale di Geofisica e Vulcanologia, Caz\u2019a Productions, l\u2019institut oc\u00e9anologique Paul Ricard et Dream Yacht Charter.<\/p>\n\n\n\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-0e47273b wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"913\" height=\"192\" src=\"https:\/\/www.mission-1ocean.com\/wp-content\/uploads\/2026\/09\/LOGO_UNESCO_Bleu.png\" alt=\"\" class=\"wp-image-11340\" srcset=\"https:\/\/www.mission-1ocean.com\/wp-content\/uploads\/2026\/09\/LOGO_UNESCO_Bleu.png 913w, https:\/\/www.mission-1ocean.com\/wp-content\/uploads\/2026\/09\/LOGO_UNESCO_Bleu-300x63.png 300w, https:\/\/www.mission-1ocean.com\/wp-content\/uploads\/2026\/09\/LOGO_UNESCO_Bleu-18x4.png 18w\" sizes=\"auto, (max-width: 913px) 100vw, 913px\" \/><\/figure>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"2434\" height=\"512\" src=\"https:\/\/www.mission-1ocean.com\/wp-content\/uploads\/2026\/09\/LOGO_SONY_Noir-1.png\" alt=\"\" class=\"wp-image-11418\" srcset=\"https:\/\/www.mission-1ocean.com\/wp-content\/uploads\/2026\/09\/LOGO_SONY_Noir-1.png 2434w, https:\/\/www.mission-1ocean.com\/wp-content\/uploads\/2026\/09\/LOGO_SONY_Noir-1-300x63.png 300w, https:\/\/www.mission-1ocean.com\/wp-content\/uploads\/2026\/09\/LOGO_SONY_Noir-1-2000x421.png 2000w, https:\/\/www.mission-1ocean.com\/wp-content\/uploads\/2026\/09\/LOGO_SONY_Noir-1-18x4.png 18w\" sizes=\"auto, (max-width: 2434px) 100vw, 2434px\" \/><\/figure>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"500\" height=\"207\" src=\"https:\/\/www.mission-1ocean.com\/wp-content\/uploads\/2026\/09\/Istituto-Nazionale-di-Geofisica-e-Vulcanologia-2.jpg\" alt=\"\" class=\"wp-image-11420\" srcset=\"https:\/\/www.mission-1ocean.com\/wp-content\/uploads\/2026\/09\/Istituto-Nazionale-di-Geofisica-e-Vulcanologia-2.jpg 500w, https:\/\/www.mission-1ocean.com\/wp-content\/uploads\/2026\/09\/Istituto-Nazionale-di-Geofisica-e-Vulcanologia-2-300x124.jpg 300w, https:\/\/www.mission-1ocean.com\/wp-content\/uploads\/2026\/09\/Istituto-Nazionale-di-Geofisica-e-Vulcanologia-2-18x7.jpg 18w\" sizes=\"auto, (max-width: 500px) 100vw, 500px\" \/><\/figure>\n<\/div>\n<\/div>\n\n\n\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-0e47273b wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"249\" height=\"166\" src=\"https:\/\/www.mission-1ocean.com\/wp-content\/uploads\/2026\/09\/LOGO_La_Caza_Prod-1.png\" alt=\"\" class=\"wp-image-11419\" srcset=\"https:\/\/www.mission-1ocean.com\/wp-content\/uploads\/2026\/09\/LOGO_La_Caza_Prod-1.png 249w, https:\/\/www.mission-1ocean.com\/wp-content\/uploads\/2026\/09\/LOGO_La_Caza_Prod-1-18x12.png 18w\" sizes=\"auto, (max-width: 249px) 100vw, 249px\" \/><\/figure>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"485\" height=\"333\" src=\"https:\/\/www.mission-1ocean.com\/wp-content\/uploads\/2026\/09\/unnamed.jpg\" alt=\"\" class=\"wp-image-11421\" srcset=\"https:\/\/www.mission-1ocean.com\/wp-content\/uploads\/2026\/09\/unnamed.jpg 485w, https:\/\/www.mission-1ocean.com\/wp-content\/uploads\/2026\/09\/unnamed-300x206.jpg 300w, https:\/\/www.mission-1ocean.com\/wp-content\/uploads\/2026\/09\/unnamed-18x12.jpg 18w\" sizes=\"auto, (max-width: 485px) 100vw, 485px\" \/><\/figure>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"774\" height=\"391\" src=\"https:\/\/www.mission-1ocean.com\/wp-content\/uploads\/2026\/09\/DYC-LOGO-IMAGE.jpg\" alt=\"\" class=\"wp-image-11422\" srcset=\"https:\/\/www.mission-1ocean.com\/wp-content\/uploads\/2026\/09\/DYC-LOGO-IMAGE.jpg 774w, https:\/\/www.mission-1ocean.com\/wp-content\/uploads\/2026\/09\/DYC-LOGO-IMAGE-300x152.jpg 300w, https:\/\/www.mission-1ocean.com\/wp-content\/uploads\/2026\/09\/DYC-LOGO-IMAGE-18x9.jpg 18w\" sizes=\"auto, (max-width: 774px) 100vw, 774px\" \/><\/figure>\n<\/div>\n<\/div>\n\n\n\n<p class=\"has-text-align-center wp-block-paragraph\">Devenez partenaire de la Fondation 1OCEAN pour soutenir la cause de la  d\u00e9couverte sous-marine !<\/p>\n\n\n\n<div class=\"wp-block-buttons is-layout-flex wp-block-buttons-is-layout-flex\">\n<div class=\"wp-block-button is-style-outline is-style-outline--1\"><a class=\"wp-block-button__link has-text-align-center wp-element-button\">Devenez partenaire !<\/a><\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n\n\n\n<p class=\"wp-block-paragraph\">La suite de notre exploration nous emm\u00e8ne bien plus profond, \u00e0 plus de soixante-dix m\u00e8tres de profondeur. Lors de leur derni\u00e8re mission, les plongeurs de l\u2019INGV ont fait la d\u00e9couverte d\u2019un lieu d\u2019exception : The Smoking Land. Les fonds marins y sont couverts de chemin\u00e9es hydrothermales auxquelles le soufre a donn\u00e9 une couleur orange caract\u00e9ristique. De mani\u00e8re continue, elles expulsent des fluides acides \u00e0 haute temp\u00e9rature.<\/p>\n\n\n\n<figure class=\"wp-block-gallery has-nested-images columns-default is-cropped wp-block-gallery-2 is-layout-flex wp-block-gallery-is-layout-flex\">\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"2000\" height=\"1335\" data-id=\"2082\" src=\"https:\/\/www.mission-1ocean.com\/wp-content\/uploads\/2022\/12\/ALR0071002-1.jpg\" alt=\"\" class=\"wp-image-2082\" srcset=\"https:\/\/www.mission-1ocean.com\/wp-content\/uploads\/2022\/12\/ALR0071002-1.jpg 2000w, https:\/\/www.mission-1ocean.com\/wp-content\/uploads\/2022\/12\/ALR0071002-1-300x200.jpg 300w, https:\/\/www.mission-1ocean.com\/wp-content\/uploads\/2022\/12\/ALR0071002-1-768x513.jpg 768w, https:\/\/www.mission-1ocean.com\/wp-content\/uploads\/2022\/12\/ALR0071002-1-1536x1025.jpg 1536w, https:\/\/www.mission-1ocean.com\/wp-content\/uploads\/2022\/12\/ALR0071002-1-200x134.jpg 200w, https:\/\/www.mission-1ocean.com\/wp-content\/uploads\/2022\/12\/ALR0071002-1-1320x881.jpg 1320w, https:\/\/www.mission-1ocean.com\/wp-content\/uploads\/2022\/12\/ALR0071002-1-600x401.jpg 600w\" sizes=\"auto, (max-width: 2000px) 100vw, 2000px\" \/><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"2000\" height=\"1333\" data-id=\"1940\" src=\"https:\/\/www.mission-1ocean.com\/wp-content\/uploads\/2022\/12\/ALR0071047.jpg\" alt=\"\" class=\"wp-image-1940\" srcset=\"https:\/\/www.mission-1ocean.com\/wp-content\/uploads\/2022\/12\/ALR0071047.jpg 2000w, https:\/\/www.mission-1ocean.com\/wp-content\/uploads\/2022\/12\/ALR0071047-300x200.jpg 300w, https:\/\/www.mission-1ocean.com\/wp-content\/uploads\/2022\/12\/ALR0071047-768x512.jpg 768w, https:\/\/www.mission-1ocean.com\/wp-content\/uploads\/2022\/12\/ALR0071047-1536x1024.jpg 1536w, https:\/\/www.mission-1ocean.com\/wp-content\/uploads\/2022\/12\/ALR0071047-200x133.jpg 200w, https:\/\/www.mission-1ocean.com\/wp-content\/uploads\/2022\/12\/ALR0071047-1320x880.jpg 1320w, https:\/\/www.mission-1ocean.com\/wp-content\/uploads\/2022\/12\/ALR0071047-600x400.jpg 600w, https:\/\/www.mission-1ocean.com\/wp-content\/uploads\/2022\/12\/ALR0071047-18x12.jpg 18w\" sizes=\"auto, (max-width: 2000px) 100vw, 2000px\" \/><\/figure>\n<\/figure>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p class=\"wp-block-paragraph\">\u00ab\u00a0Les volcans sous-marins de Panarea sont l\u2019un des paysages les plus marquants qu\u2019il m\u2019ait \u00e9t\u00e9 donn\u00e9 de voir. On est parfois \u00e0 plus de soixante-dix m\u00e8tres de profondeur, au beau milieu d\u2019un champ de chemin\u00e9es volcaniques qui crachent des gaz et fluides br\u00fblants, toxiques\u2026 C\u2019est une ambiance \u00e9poustouflante, o\u00f9 l\u2019on est \u00e0 la fois envelopp\u00e9s par le silence infini de l\u2019oc\u00e9an et t\u00e9moins de ce spectacle dantesque, un peu comme si l\u2019on se trouvait aux portes des enfers. On comprend alors que la Terre est vivante. Depuis la surface, on ne se doute de rien.\u201d<\/p>\n<cite>Alexis Rosenfeld<\/cite><\/blockquote>\n\n\n\n<h3 class=\"wp-block-heading\">LES VOLCANS SOUS-MARINS, BERCEAU DU VIVANT<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Paradoxalement, les conditions extr\u00eames dans ces fonds marins pourraient aussi \u00eatre la cl\u00e9 de l\u2019une des plus grandes questions de l\u2019humanit\u00e9 : l\u2019origine de la vie. En effet, selon les scientifiques, c\u2019est autour de ces \u00e9ruptions volcaniques que seraient n\u00e9s les premiers organismes ; c\u2019est l\u00e0 que le min\u00e9ral se transforme en vivant. Le volcanologue Francesco Italiano explique : \u201cC\u2019est sur ces chemin\u00e9es hydrothermales que les composants chimiques sont transform\u00e9s en mati\u00e8re vivante. C\u2019est ici que la vie commence.\u201d<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Les fonds marins de la caldeira de Panarea sont d\u2019ailleurs parsem\u00e9s de t\u00e2ches blanches que l\u2019on trouve g\u00e9n\u00e9ralement \u00e0 la base des colonnes de gaz. Ces t\u00e2ches sont en r\u00e9alit\u00e9 des amas de bact\u00e9ries qui se nourrissent principalement de carbone. Elles constituent le premier maillon de la cha\u00eene alimentaire, la base des \u00e9cosyst\u00e8mes terrestres.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">DMAR, UN LABORATOIRE SCIENTIFIQUE COMMUN<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Francesco Italiano l\u2019assure : \u201cPanarea est un endroit unique. C\u2019est un laboratoire naturel o\u00f9 beaucoup de disciplines scientifiques diff\u00e9rentes peuvent se rencontrer et travailler ensemble\u201d.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Avec l\u2019INFN (Institut national de physique nucl\u00e9aire) et le CNR (Centre National de Recherche), le volcanologue et d\u2019autres chercheurs de l\u2019INGV sont en train de cr\u00e9er un projet d\u2019ampleur autour de la Sicile : <a href=\"https:\/\/www.pa.ingv.it\/index.php\/2021\/09\/29\/idmar\/\">le projet IDMAR<\/a>. Au c\u0153ur de ce projet, une plateforme scientifique d\u2019accueil et de partage pluridisciplinaire dont l\u2019objectif est de recueillir et de centraliser une multitude de donn\u00e9es en continu. IDMAR, c\u2019est la science qui travaille ensemble pour une meilleure connaissance des ph\u00e9nom\u00e8nes sous-marins en Sicile.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">PANAREA \u2013 STROMBOLI, UN AXE INSTABLE<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Gr\u00e2ce \u00e0 ce programme, Francesco Italiano et son \u00e9quipe peuvent \u00e9couter les volcans en permanence. Ces derni\u00e8res ann\u00e9es, ils ont observ\u00e9 d\u2019inqui\u00e9tants changements dans le comportement des volcans de la r\u00e9gion. Le Stromboli, notamment, les tient en alerte : depuis quelque temps, les analyses montrent une instabilit\u00e9 anormale qui fait craindre aux scientifiques un \u00e9v\u00e9nement d\u2019envergure :<\/p>\n\n\n\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-0e47273b wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:33.33%\">\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p class=\"wp-block-paragraph\">\u201cLe Stromboli est un volcan actif. Il g\u00e9n\u00e8re en permanence des explosions de faible intensit\u00e9 mais parfois son activit\u00e9 change de nature. Il produit alors des coul\u00e9es de laves mais aussi d\u2019\u00e9normes explosions qui peuvent \u00eatre tr\u00e8s dangereuses pour les Hommes.\u201d <\/p>\n<cite>Francesco Italiano<\/cite><\/blockquote>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:66.66%\">\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"2000\" height=\"1197\" src=\"https:\/\/www.mission-1ocean.com\/wp-content\/uploads\/2022\/12\/ALR0071004.jpg\" alt=\"\" class=\"wp-image-1948\" srcset=\"https:\/\/www.mission-1ocean.com\/wp-content\/uploads\/2022\/12\/ALR0071004.jpg 2000w, https:\/\/www.mission-1ocean.com\/wp-content\/uploads\/2022\/12\/ALR0071004-300x180.jpg 300w, https:\/\/www.mission-1ocean.com\/wp-content\/uploads\/2022\/12\/ALR0071004-768x460.jpg 768w, https:\/\/www.mission-1ocean.com\/wp-content\/uploads\/2022\/12\/ALR0071004-1536x919.jpg 1536w, https:\/\/www.mission-1ocean.com\/wp-content\/uploads\/2022\/12\/ALR0071004-200x120.jpg 200w, https:\/\/www.mission-1ocean.com\/wp-content\/uploads\/2022\/12\/ALR0071004-1320x790.jpg 1320w, https:\/\/www.mission-1ocean.com\/wp-content\/uploads\/2022\/12\/ALR0071004-600x359.jpg 600w, https:\/\/www.mission-1ocean.com\/wp-content\/uploads\/2022\/12\/ALR0071004-18x12.jpg 18w\" sizes=\"auto, (max-width: 2000px) 100vw, 2000px\" \/><figcaption class=\"wp-element-caption\">Iles Eoliennes &#8211; Dans le crat\u00e8re immerg\u00e9 de l&rsquo;ile de Panarea une \u00e9ruption de gaz. Depuis la chambre magmatique plus d&rsquo;un million de litres de dioxyde de carbone est expuls\u00e9 chaque jour des entrailles de la terre. \u00a9Alexis Rosenfeld<\/figcaption><\/figure>\n<\/div>\n<\/div>\n\n\n\n<p class=\"wp-block-paragraph\">Il y a quelques ann\u00e9es, une explosion phr\u00e9atique dans la caldeira de Panarea avait ouvert une faille jusqu\u2019au Stromboli et caus\u00e9 un effondrement sur le volcan. Cette \u00e9ruption de gaz d\u00e9gageait chaque jour plus d\u2019un milliard de litres de dioxyde de carbone. Il y a peu de temps, les scientifiques ont fait une d\u00e9couverte importante : le Stromboli et la caldeira de Panarea sont en r\u00e9alit\u00e9 reli\u00e9s \u00e0 une seule et m\u00eame chambre magmatique.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">LES TSUNAMIS, UN RISQUE MAJEUR ET UNE GESTION COORDONN\u00c9E PAR LA COI-UNESCO<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">L\u2019une des principales inqui\u00e9tudes des scientifiques : la possibilit\u00e9 qu\u2019une \u00e9ruption g\u00e9n\u00e8re un tsunami de grande ampleur qui repr\u00e9senterait un risque majeur pour les populations de la r\u00e9gion.<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p class=\"wp-block-paragraph\">\u201cL\u2019un des risques est la possibilit\u00e9 d\u2019un tsunami. Le principal probl\u00e8me pour faire face \u00e0 ce risque, c\u2019est la faible distance entre les \u00eeles. Un tsunami se d\u00e9place \u00e0 tr\u00e8s grande vitesse, au minimum \u00e0 300 km\/h. Un tsunami peut donc atteindre l\u2019une des \u00eeles en seulement quelques minutes.\u201d<\/p>\n<\/blockquote>\n\n\n\n<p class=\"wp-block-paragraph\">Les tsunamis repr\u00e9sentent un risque majeur pour les littoraux et peuvent traverser de grandes distances. En 1960, un s\u00e9isme de magnitude 9.5 \u2013 la plus \u00e9lev\u00e9e jamais enregistr\u00e9e \u2013 a eu lieu \u00e0 proximit\u00e9 de Valdivia, au Chili. Le tsunami qui en a r\u00e9sult\u00e9 a travers\u00e9 l\u2019int\u00e9gralit\u00e9 de l\u2019oc\u00e9an Pacifique et l\u2019on a enregistr\u00e9 des d\u00e9g\u00e2ts jusqu\u2019aux c\u00f4tes japonaises, \u00e0 environ 17 000 kilom\u00e8tres de l\u2019\u00e9picentre.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Face \u00e0 cette \u00e9ventualit\u00e9, l<a href=\"https:\/\/www.unesco.org\/fr\/articles\/resilience-aux-tsunamis-lunesco-formera-100-des-populations-cotieres-risque-dici-2030#:~:text=Une%20menace%20pour%20toutes%20les%20r\u00e9gions%20du%20monde&amp;text=Les%20statistiques%20montrent%20que%20la,ann\u00e9es%20est%20proche%20de%20100%20%25.\">\u2019UNESCO travaille \u00e0 un programme de formation des populations c\u00f4ti\u00e8res<\/a>. L\u2019organisation dispose d\u00e9j\u00e0 d\u2019une longue exp\u00e9rience dans ce domaine, par le biais de sa Commission Oc\u00e9anographique Intergouvernementale (COI) qui coordonne le Centre d\u2019alerte aux tsunamis du Pacifique (PTWS) depuis les ann\u00e9es 60. Depuis 2005, trois nouveaux syst\u00e8mes sont venus s\u2019ajouter au programme : le CTWS dans les Cara\u00efbes, le IOTWS pour l\u2019Oc\u00e9an Indien et le NEAMTWS pour le Nord-Est Atlantique et la M\u00e9diterran\u00e9e.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">En janvier 2022, ce syst\u00e8me d\u2019alerte coordonn\u00e9 par l\u2019UNESCO a permis de r\u00e9agir tr\u00e8s rapidement \u00e0 un tsunami g\u00e9n\u00e9r\u00e9 par une \u00e9ruption volcanique sous-marine dans les \u00eeles Tonga. Si les d\u00e9g\u00e2ts mat\u00e9riels ont \u00e9t\u00e9 importants, des centaines de vies humaines ont pu \u00eatre pr\u00e9serv\u00e9es gr\u00e2ce \u00e0 une excellente coop\u00e9ration multilat\u00e9rale.<\/p>","protected":false},"excerpt":{"rendered":"<p>Une mission aux portes des entrailles de la Terre, en qu\u00eate de l&rsquo;origine de la vie. Depuis 2021, l\u2019activit\u00e9 du volcan Stromboli a redoubl\u00e9 d\u2019intensit\u00e9, g\u00e9n\u00e9rant des \u00e9boulements et d\u2019\u00e9pais nuages de fum\u00e9e qui alertent les sp\u00e9cialistes. Premier t\u00e9moin de l\u2019activit\u00e9 volcanique intense dans les \u00eeles \u00c9oliennes, le Stromboli est l\u2019un des deux derniers volcans &hellip; <\/p>\n<p class=\"link-more\"><a href=\"https:\/\/www.mission-1ocean.com\/en\/20-000-volcans-sous-les-mers\/\" class=\"more-link\">Read more<span class=\"screen-reader-text\"> \u00ab\u00a020 000 volcans sous les mers\u00a0\u00bb<\/span><\/a><\/p>","protected":false},"author":12,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"inspiro_hide_title":false,"inspiro_hide_featured_image":false,"footnotes":"","_links_to":"","_links_to_target":""},"class_list":["post-11414","page","type-page","status-publish","hentry"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.8 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>20 000 volcans sous les mers - 1OCEAN<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.mission-1ocean.com\/en\/20-000-volcans-sous-les-mers\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"20 000 volcans sous les mers - 1OCEAN\" \/>\n<meta property=\"og:description\" content=\"Une mission aux portes des entrailles de la Terre, en qu\u00eate de l&rsquo;origine de la vie. Depuis 2021, l\u2019activit\u00e9 du volcan Stromboli a redoubl\u00e9 d\u2019intensit\u00e9, g\u00e9n\u00e9rant des \u00e9boulements et d\u2019\u00e9pais nuages de fum\u00e9e qui alertent les sp\u00e9cialistes. Premier t\u00e9moin de l\u2019activit\u00e9 volcanique intense dans les \u00eeles \u00c9oliennes, le Stromboli est l\u2019un des deux derniers volcans &hellip; Read more &quot;20 000 volcans sous les mers&quot;\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.mission-1ocean.com\/en\/20-000-volcans-sous-les-mers\/\" \/>\n<meta property=\"og:site_name\" content=\"1OCEAN\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/AlexisRosenfeld\/?locale=fr_FR\" \/>\n<meta property=\"article:modified_time\" content=\"2026-09-24T11:09:44+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.mission-1ocean.com\/wp-content\/uploads\/2026\/09\/LOGO_UNESCO_Bleu.png\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:site\" content=\"@alexisrosenfeld\" \/>\n<meta name=\"twitter:label1\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data1\" content=\"8 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/www.mission-1ocean.com\\\/20-000-volcans-sous-les-mers\\\/\",\"url\":\"https:\\\/\\\/www.mission-1ocean.com\\\/20-000-volcans-sous-les-mers\\\/\",\"name\":\"20 000 volcans sous les mers - 1OCEAN\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.mission-1ocean.com\\\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\\\/\\\/www.mission-1ocean.com\\\/20-000-volcans-sous-les-mers\\\/#primaryimage\"},\"image\":{\"@id\":\"https:\\\/\\\/www.mission-1ocean.com\\\/20-000-volcans-sous-les-mers\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/www.mission-1ocean.com\\\/wp-content\\\/uploads\\\/2026\\\/09\\\/LOGO_UNESCO_Bleu.png\",\"datePublished\":\"2026-09-23T20:17:19+00:00\",\"dateModified\":\"2026-09-24T11:09:44+00:00\",\"breadcrumb\":{\"@id\":\"https:\\\/\\\/www.mission-1ocean.com\\\/20-000-volcans-sous-les-mers\\\/#breadcrumb\"},\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\\\/\\\/www.mission-1ocean.com\\\/20-000-volcans-sous-les-mers\\\/\"]}]},{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\\\/\\\/www.mission-1ocean.com\\\/20-000-volcans-sous-les-mers\\\/#primaryimage\",\"url\":\"https:\\\/\\\/www.mission-1ocean.com\\\/wp-content\\\/uploads\\\/2026\\\/09\\\/LOGO_UNESCO_Bleu.png\",\"contentUrl\":\"https:\\\/\\\/www.mission-1ocean.com\\\/wp-content\\\/uploads\\\/2026\\\/09\\\/LOGO_UNESCO_Bleu.png\"},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\\\/\\\/www.mission-1ocean.com\\\/20-000-volcans-sous-les-mers\\\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Accueil\",\"item\":\"https:\\\/\\\/www.mission-1ocean.com\\\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"20 000 volcans sous les mers\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\\\/\\\/www.mission-1ocean.com\\\/#website\",\"url\":\"https:\\\/\\\/www.mission-1ocean.com\\\/\",\"name\":\"1OCEAN\",\"description\":\"Explorer, comprendre, prot\u00e9ger l&#039;oc\u00e9an\",\"publisher\":{\"@id\":\"https:\\\/\\\/www.mission-1ocean.com\\\/#organization\"},\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\\\/\\\/www.mission-1ocean.com\\\/?s={search_term_string}\"},\"query-input\":{\"@type\":\"PropertyValueSpecification\",\"valueRequired\":true,\"valueName\":\"search_term_string\"}}],\"inLanguage\":\"en-US\"},{\"@type\":\"Organization\",\"@id\":\"https:\\\/\\\/www.mission-1ocean.com\\\/#organization\",\"name\":\"1OCEAN\",\"url\":\"https:\\\/\\\/www.mission-1ocean.com\\\/\",\"logo\":{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\\\/\\\/www.mission-1ocean.com\\\/#\\\/schema\\\/logo\\\/image\\\/\",\"url\":\"https:\\\/\\\/www.mission-1ocean.com\\\/wp-content\\\/uploads\\\/2026\\\/10\\\/cropped-logo_site-web_1ocean-2.png\",\"contentUrl\":\"https:\\\/\\\/www.mission-1ocean.com\\\/wp-content\\\/uploads\\\/2026\\\/10\\\/cropped-logo_site-web_1ocean-2.png\",\"width\":250,\"height\":63,\"caption\":\"1OCEAN\"},\"image\":{\"@id\":\"https:\\\/\\\/www.mission-1ocean.com\\\/#\\\/schema\\\/logo\\\/image\\\/\"},\"sameAs\":[\"https:\\\/\\\/www.facebook.com\\\/AlexisRosenfeld\\\/?locale=fr_FR\",\"https:\\\/\\\/x.com\\\/alexisrosenfeld\"]}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"20 000 volcans sous les mers - 1OCEAN","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/www.mission-1ocean.com\/en\/20-000-volcans-sous-les-mers\/","og_locale":"en_US","og_type":"article","og_title":"20 000 volcans sous les mers - 1OCEAN","og_description":"Une mission aux portes des entrailles de la Terre, en qu\u00eate de l&rsquo;origine de la vie. Depuis 2021, l\u2019activit\u00e9 du volcan Stromboli a redoubl\u00e9 d\u2019intensit\u00e9, g\u00e9n\u00e9rant des \u00e9boulements et d\u2019\u00e9pais nuages de fum\u00e9e qui alertent les sp\u00e9cialistes. Premier t\u00e9moin de l\u2019activit\u00e9 volcanique intense dans les \u00eeles \u00c9oliennes, le Stromboli est l\u2019un des deux derniers volcans &hellip; Read more \"20 000 volcans sous les mers\"","og_url":"https:\/\/www.mission-1ocean.com\/en\/20-000-volcans-sous-les-mers\/","og_site_name":"1OCEAN","article_publisher":"https:\/\/www.facebook.com\/AlexisRosenfeld\/?locale=fr_FR","article_modified_time":"2026-09-24T11:09:44+00:00","og_image":[{"url":"https:\/\/www.mission-1ocean.com\/wp-content\/uploads\/2026\/09\/LOGO_UNESCO_Bleu.png","type":"","width":"","height":""}],"twitter_card":"summary_large_image","twitter_site":"@alexisrosenfeld","twitter_misc":{"Est. reading time":"8 minutes"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"WebPage","@id":"https:\/\/www.mission-1ocean.com\/20-000-volcans-sous-les-mers\/","url":"https:\/\/www.mission-1ocean.com\/20-000-volcans-sous-les-mers\/","name":"20 000 volcans sous les mers - 1OCEAN","isPartOf":{"@id":"https:\/\/www.mission-1ocean.com\/#website"},"primaryImageOfPage":{"@id":"https:\/\/www.mission-1ocean.com\/20-000-volcans-sous-les-mers\/#primaryimage"},"image":{"@id":"https:\/\/www.mission-1ocean.com\/20-000-volcans-sous-les-mers\/#primaryimage"},"thumbnailUrl":"https:\/\/www.mission-1ocean.com\/wp-content\/uploads\/2026\/09\/LOGO_UNESCO_Bleu.png","datePublished":"2026-09-23T20:17:19+00:00","dateModified":"2026-09-24T11:09:44+00:00","breadcrumb":{"@id":"https:\/\/www.mission-1ocean.com\/20-000-volcans-sous-les-mers\/#breadcrumb"},"inLanguage":"en-US","potentialAction":[{"@type":"ReadAction","target":["https:\/\/www.mission-1ocean.com\/20-000-volcans-sous-les-mers\/"]}]},{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/www.mission-1ocean.com\/20-000-volcans-sous-les-mers\/#primaryimage","url":"https:\/\/www.mission-1ocean.com\/wp-content\/uploads\/2026\/09\/LOGO_UNESCO_Bleu.png","contentUrl":"https:\/\/www.mission-1ocean.com\/wp-content\/uploads\/2026\/09\/LOGO_UNESCO_Bleu.png"},{"@type":"BreadcrumbList","@id":"https:\/\/www.mission-1ocean.com\/20-000-volcans-sous-les-mers\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Accueil","item":"https:\/\/www.mission-1ocean.com\/"},{"@type":"ListItem","position":2,"name":"20 000 volcans sous les mers"}]},{"@type":"WebSite","@id":"https:\/\/www.mission-1ocean.com\/#website","url":"https:\/\/www.mission-1ocean.com\/","name":"1OCEAN","description":"Explorer, comprendre, prot\u00e9ger l&#039;oc\u00e9an","publisher":{"@id":"https:\/\/www.mission-1ocean.com\/#organization"},"potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/www.mission-1ocean.com\/?s={search_term_string}"},"query-input":{"@type":"PropertyValueSpecification","valueRequired":true,"valueName":"search_term_string"}}],"inLanguage":"en-US"},{"@type":"Organization","@id":"https:\/\/www.mission-1ocean.com\/#organization","name":"1OCEAN","url":"https:\/\/www.mission-1ocean.com\/","logo":{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/www.mission-1ocean.com\/#\/schema\/logo\/image\/","url":"https:\/\/www.mission-1ocean.com\/wp-content\/uploads\/2026\/10\/cropped-logo_site-web_1ocean-2.png","contentUrl":"https:\/\/www.mission-1ocean.com\/wp-content\/uploads\/2026\/10\/cropped-logo_site-web_1ocean-2.png","width":250,"height":63,"caption":"1OCEAN"},"image":{"@id":"https:\/\/www.mission-1ocean.com\/#\/schema\/logo\/image\/"},"sameAs":["https:\/\/www.facebook.com\/AlexisRosenfeld\/?locale=fr_FR","https:\/\/x.com\/alexisrosenfeld"]}]}},"_links":{"self":[{"href":"https:\/\/www.mission-1ocean.com\/en\/wp-json\/wp\/v2\/pages\/11414","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.mission-1ocean.com\/en\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/www.mission-1ocean.com\/en\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/www.mission-1ocean.com\/en\/wp-json\/wp\/v2\/users\/12"}],"replies":[{"embeddable":true,"href":"https:\/\/www.mission-1ocean.com\/en\/wp-json\/wp\/v2\/comments?post=11414"}],"version-history":[{"count":17,"href":"https:\/\/www.mission-1ocean.com\/en\/wp-json\/wp\/v2\/pages\/11414\/revisions"}],"predecessor-version":[{"id":11464,"href":"https:\/\/www.mission-1ocean.com\/en\/wp-json\/wp\/v2\/pages\/11414\/revisions\/11464"}],"wp:attachment":[{"href":"https:\/\/www.mission-1ocean.com\/en\/wp-json\/wp\/v2\/media?parent=11414"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}