{"id":28943,"date":"2026-07-07T08:00:52","date_gmt":"2026-07-07T06:00:52","guid":{"rendered":"https:\/\/www.laterredufutur.com\/accueil\/?p=28943"},"modified":"2026-07-07T08:01:12","modified_gmt":"2026-07-07T06:01:12","slug":"les-maars-ces-crateres-geants-nes-dune-rencontre-explosive-entre-leau-et-le-feu","status":"publish","type":"post","link":"https:\/\/www.laterredufutur.com\/accueil\/les-maars-ces-crateres-geants-nes-dune-rencontre-explosive-entre-leau-et-le-feu\/","title":{"rendered":"Les maars, ces crat\u00e8res g\u00e9ants n\u00e9s d&rsquo;une rencontre explosive entre l&rsquo;eau et le feu"},"content":{"rendered":"<div class=\"1665f18d14f35dd9e7566e1a8ac9a3e9\" data-index=\"1\" style=\"float: none; margin:10px 0 10px 0; text-align:center;\">\n<script async src=\"https:\/\/pagead2.googlesyndication.com\/pagead\/js\/adsbygoogle.js\"><\/script>\r\n<ins class=\"adsbygoogle\"\r\n     style=\"display:block; text-align:center;\"\r\n     data-ad-layout=\"in-article\"\r\n     data-ad-format=\"fluid\"\r\n     data-ad-client=\"ca-pub-2860849627502538\"\r\n     data-ad-slot=\"3019501113\"><\/ins>\r\n<script>\r\n     (adsbygoogle = window.adsbygoogle || []).push({});\r\n<\/script>\n<\/div>\n<p><strong>Les maars : quand l&rsquo;eau et le feu fa\u00e7onnent la Terre<\/strong><\/p>\n<p>Pendant des millions d&rsquo;ann\u00e9es, les volcans ont model\u00e9 notre plan\u00e8te en \u00e9rigeant montagnes, plateaux et \u00eeles. Pourtant, certains volcans ont laiss\u00e9 derri\u00e8re eux non pas des sommets majestueux, mais d&rsquo;immenses crat\u00e8res circulaires remplis d&rsquo;eau. Ces formations g\u00e9ologiques \u00e9tonnantes portent un nom peu connu : les maars.<\/p>\n<p><strong>Une naissance explosive<\/strong><\/p>\n<p>Contrairement aux volcans classiques qui construisent progressivement un c\u00f4ne de lave, un maar na\u00eet d&rsquo;une rencontre brutale entre le magma et l&rsquo;eau souterraine.<\/p>\n<p>Lorsque du magma en fusion remonte vers la surface et entre en contact avec une nappe phr\u00e9atique ou un r\u00e9servoir d&rsquo;eau souterrain, l&rsquo;eau est instantan\u00e9ment transform\u00e9e en vapeur. Son volume augmente alors de fa\u00e7on spectaculaire, provoquant une explosion d&rsquo;une violence extr\u00eame.<\/p>\n<p>Cette \u00e9ruption, appel\u00e9e \u00e9ruption phr\u00e9atomagmatique, pulv\u00e9rise les roches environnantes et creuse un immense crat\u00e8re. Dans certains cas, plusieurs explosions successives \u00e9largissent encore davantage la cavit\u00e9.<\/p>\n<p><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" data-attachment-id=\"28948\" data-permalink=\"https:\/\/www.laterredufutur.com\/accueil\/les-maars-ces-crateres-geants-nes-dune-rencontre-explosive-entre-leau-et-le-feu\/formation-dun-maar-volcanique\/\" data-orig-file=\"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2026\/07\/Formation-dun-maar-volcanique.jpg?fit=1536%2C1024&amp;ssl=1\" data-orig-size=\"1536,1024\" data-comments-opened=\"0\" data-image-meta=\"{&quot;aperture&quot;:&quot;0&quot;,&quot;credit&quot;:&quot;&quot;,&quot;camera&quot;:&quot;&quot;,&quot;caption&quot;:&quot;&quot;,&quot;created_timestamp&quot;:&quot;0&quot;,&quot;copyright&quot;:&quot;&quot;,&quot;focal_length&quot;:&quot;0&quot;,&quot;iso&quot;:&quot;0&quot;,&quot;shutter_speed&quot;:&quot;0&quot;,&quot;title&quot;:&quot;&quot;,&quot;orientation&quot;:&quot;0&quot;,&quot;alt&quot;:&quot;&quot;}\" data-image-title=\"Formation dun maar volcanique\" data-image-description=\"\" data-image-caption=\"\" data-large-file=\"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2026\/07\/Formation-dun-maar-volcanique.jpg?fit=800%2C533&amp;ssl=1\" class=\"aligncenter wp-image-28948 size-full\" src=\"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2026\/07\/Formation-dun-maar-volcanique.jpg?resize=1536%2C1024&#038;ssl=1\" alt=\"\" width=\"1536\" height=\"1024\" srcset=\"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2026\/07\/Formation-dun-maar-volcanique.jpg?w=1536&amp;ssl=1 1536w, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2026\/07\/Formation-dun-maar-volcanique.jpg?resize=300%2C200&amp;ssl=1 300w, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2026\/07\/Formation-dun-maar-volcanique.jpg?resize=800%2C533&amp;ssl=1 800w, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2026\/07\/Formation-dun-maar-volcanique.jpg?resize=80%2C53&amp;ssl=1 80w, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2026\/07\/Formation-dun-maar-volcanique.jpg?resize=768%2C512&amp;ssl=1 768w, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2026\/07\/Formation-dun-maar-volcanique.jpg?resize=1226%2C817&amp;ssl=1 1226w, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2026\/07\/Formation-dun-maar-volcanique.jpg?resize=928%2C619&amp;ssl=1 928w, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2026\/07\/Formation-dun-maar-volcanique.jpg?resize=480%2C320&amp;ssl=1 480w\" sizes=\"auto, (max-width: 1000px) 100vw, 1000px\" \/><\/p>\n<p><strong>Des volcans \u00e0 l&rsquo;envers<\/strong><\/p>\n<p>Les maars sont souvent d\u00e9crits comme des \u00ab volcans \u00e0 l&rsquo;envers \u00bb. En effet, au lieu de construire un relief \u00e9lev\u00e9, l&rsquo;\u00e9ruption creuse profond\u00e9ment le sol.<\/p>\n<p>Le crat\u00e8re obtenu pr\u00e9sente g\u00e9n\u00e9ralement une forme circulaire ou l\u00e9g\u00e8rement ovale. Son diam\u00e8tre varie de quelques centaines de m\u00e8tres \u00e0 plusieurs kilom\u00e8tres.<\/p>\n<p>Apr\u00e8s l&rsquo;arr\u00eat de l&rsquo;activit\u00e9 volcanique, le crat\u00e8re se remplit progressivement d&rsquo;eau de pluie, de ruissellement ou d&rsquo;eau souterraine, donnant naissance \u00e0 un lac souvent spectaculaire.<\/p>\n<p><strong>Des archives naturelles du climat<\/strong><\/p>\n<p>Les lacs de maar poss\u00e8dent une valeur scientifique exceptionnelle.<\/p>\n<p>Au fond de ces bassins s&rsquo;accumulent ann\u00e9e apr\u00e8s ann\u00e9e des couches de s\u00e9diments contenant pollens, poussi\u00e8res, cendres volcaniques et d\u00e9bris v\u00e9g\u00e9taux. Ces archives naturelles permettent aux chercheurs de reconstituer l&rsquo;\u00e9volution du climat sur des dizaines de milliers d&rsquo;ann\u00e9es.<\/p>\n<p>Gr\u00e2ce \u00e0 l&rsquo;\u00e9tude de ces d\u00e9p\u00f4ts, les scientifiques peuvent retracer les variations de temp\u00e9rature, l&rsquo;\u00e9volution des for\u00eats, les p\u00e9riodes de s\u00e9cheresse ou encore les impacts des activit\u00e9s humaines.<\/p>\n<p><strong>Les plus c\u00e9l\u00e8bres maars du monde<\/strong><\/p>\n<p>Parmi les maars les plus remarquables figurent :<\/p>\n<p>Lac du Bouchet, l&rsquo;un des plus beaux maars fran\u00e7ais.<\/p>\n<p>Lac Pavin, c\u00e9l\u00e8bre pour ses eaux profondes et ses l\u00e9gendes.<\/p>\n<p>Laacher See, form\u00e9 par une gigantesque \u00e9ruption il y a environ 13 000 ans.<\/p>\n<p>Les maars du champ volcanique d&rsquo;Eifel, qui comptent parmi les plus nombreux au monde.<\/p>\n<figure id=\"attachment_28946\" aria-describedby=\"caption-attachment-28946\" style=\"width: 450px\" class=\"wp-caption aligncenter\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" data-attachment-id=\"28946\" data-permalink=\"https:\/\/www.laterredufutur.com\/accueil\/les-maars-ces-crateres-geants-nes-dune-rencontre-explosive-entre-leau-et-le-feu\/lac-du-bouchet\/\" data-orig-file=\"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2026\/07\/Lac-du-bouchet-scaled.jpg?fit=1441%2C2560&amp;ssl=1\" data-orig-size=\"1441,2560\" data-comments-opened=\"0\" data-image-meta=\"{&quot;aperture&quot;:&quot;1.8&quot;,&quot;credit&quot;:&quot;&quot;,&quot;camera&quot;:&quot;SM-S908U1&quot;,&quot;caption&quot;:&quot;&quot;,&quot;created_timestamp&quot;:&quot;1781359780&quot;,&quot;copyright&quot;:&quot;&quot;,&quot;focal_length&quot;:&quot;6.4&quot;,&quot;iso&quot;:&quot;12&quot;,&quot;shutter_speed&quot;:&quot;0.005403736&quot;,&quot;title&quot;:&quot;&quot;,&quot;orientation&quot;:&quot;1&quot;,&quot;alt&quot;:&quot;&quot;}\" data-image-title=\"Lac du bouchet\" data-image-description=\"\" data-image-caption=\"\" data-large-file=\"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2026\/07\/Lac-du-bouchet-scaled.jpg?fit=450%2C800&amp;ssl=1\" class=\"wp-image-28946 size-large\" src=\"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2026\/07\/Lac-du-bouchet.jpg?resize=450%2C800&#038;ssl=1\" alt=\"\" width=\"450\" height=\"800\" srcset=\"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2026\/07\/Lac-du-bouchet-scaled.jpg?resize=450%2C800&amp;ssl=1 450w, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2026\/07\/Lac-du-bouchet-scaled.jpg?resize=169%2C300&amp;ssl=1 169w, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2026\/07\/Lac-du-bouchet-scaled.jpg?resize=34%2C60&amp;ssl=1 34w, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2026\/07\/Lac-du-bouchet-scaled.jpg?resize=768%2C1364&amp;ssl=1 768w, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2026\/07\/Lac-du-bouchet-scaled.jpg?resize=865%2C1536&amp;ssl=1 865w, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2026\/07\/Lac-du-bouchet-scaled.jpg?resize=1153%2C2048&amp;ssl=1 1153w, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2026\/07\/Lac-du-bouchet-scaled.jpg?resize=1226%2C2178&amp;ssl=1 1226w, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2026\/07\/Lac-du-bouchet-scaled.jpg?resize=928%2C1648&amp;ssl=1 928w, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2026\/07\/Lac-du-bouchet-scaled.jpg?resize=480%2C853&amp;ssl=1 480w, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2026\/07\/Lac-du-bouchet-scaled.jpg?w=1441&amp;ssl=1 1441w\" sizes=\"auto, (max-width: 450px) 100vw, 450px\" \/><figcaption id=\"caption-attachment-28946\" class=\"wp-caption-text\">Lac du Bouchet<\/figcaption><\/figure>\n<p><strong>Le cas fascinant du lac du Bouchet<\/strong><\/p>\n<p>Situ\u00e9 sur le plateau volcanique du Velay, en Haute-Loire, le lac du Bouchet est un exemple presque parfait de maar.<\/p>\n<p>Il s&rsquo;est form\u00e9 \u00e0 la suite d&rsquo;une explosion volcanique qui a d\u00e9truit une partie du relief pr\u00e9existant. Le crat\u00e8re, large d&rsquo;environ 800 m\u00e8tres, s&rsquo;est ensuite rempli d&rsquo;eau pour former le lac actuel.<\/p>\n<p>Aujourd&rsquo;hui entour\u00e9 de for\u00eats, il offre un paysage paisible qui contraste fortement avec la violence de sa naissance.<\/p>\n<figure id=\"attachment_28951\" aria-describedby=\"caption-attachment-28951\" style=\"width: 800px\" class=\"wp-caption aligncenter\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" data-attachment-id=\"28951\" data-permalink=\"https:\/\/www.laterredufutur.com\/accueil\/les-maars-ces-crateres-geants-nes-dune-rencontre-explosive-entre-leau-et-le-feu\/lac-du-bouchet-haute-loire\/\" data-orig-file=\"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2026\/07\/Lac-du-bouchet-haute-loire.jpg?fit=1670%2C941&amp;ssl=1\" data-orig-size=\"1670,941\" data-comments-opened=\"0\" data-image-meta=\"{&quot;aperture&quot;:&quot;0&quot;,&quot;credit&quot;:&quot;&quot;,&quot;camera&quot;:&quot;&quot;,&quot;caption&quot;:&quot;&quot;,&quot;created_timestamp&quot;:&quot;0&quot;,&quot;copyright&quot;:&quot;&quot;,&quot;focal_length&quot;:&quot;0&quot;,&quot;iso&quot;:&quot;0&quot;,&quot;shutter_speed&quot;:&quot;0&quot;,&quot;title&quot;:&quot;&quot;,&quot;orientation&quot;:&quot;0&quot;,&quot;alt&quot;:&quot;&quot;}\" data-image-title=\"Lac du bouchet haute loire\" data-image-description=\"\" data-image-caption=\"\" data-large-file=\"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2026\/07\/Lac-du-bouchet-haute-loire.jpg?fit=800%2C451&amp;ssl=1\" class=\"wp-image-28951 size-large\" src=\"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2026\/07\/Lac-du-bouchet-haute-loire.jpg?resize=800%2C451&#038;ssl=1\" alt=\"\" width=\"800\" height=\"451\" srcset=\"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2026\/07\/Lac-du-bouchet-haute-loire.jpg?resize=800%2C451&amp;ssl=1 800w, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2026\/07\/Lac-du-bouchet-haute-loire.jpg?resize=300%2C169&amp;ssl=1 300w, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2026\/07\/Lac-du-bouchet-haute-loire.jpg?resize=80%2C45&amp;ssl=1 80w, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2026\/07\/Lac-du-bouchet-haute-loire.jpg?resize=768%2C433&amp;ssl=1 768w, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2026\/07\/Lac-du-bouchet-haute-loire.jpg?resize=1536%2C865&amp;ssl=1 1536w, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2026\/07\/Lac-du-bouchet-haute-loire.jpg?resize=1226%2C691&amp;ssl=1 1226w, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2026\/07\/Lac-du-bouchet-haute-loire.jpg?resize=928%2C523&amp;ssl=1 928w, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2026\/07\/Lac-du-bouchet-haute-loire.jpg?resize=480%2C270&amp;ssl=1 480w, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2026\/07\/Lac-du-bouchet-haute-loire.jpg?w=1670&amp;ssl=1 1670w\" sizes=\"auto, (max-width: 800px) 100vw, 800px\" \/><figcaption id=\"caption-attachment-28951\" class=\"wp-caption-text\">Lac du Bouchet Haute Loire<\/figcaption><\/figure>\n<p><strong>Les maars existent-ils encore aujourd&rsquo;hui ?<\/strong><\/p>\n<p>Oui. M\u00eame si les grands maars europ\u00e9ens sont anciens, ce type d&rsquo;\u00e9ruption peut encore se produire dans des r\u00e9gions volcaniques actives.<\/p>\n<p>Des explosions phr\u00e9atomagmatiques ont \u00e9t\u00e9 observ\u00e9es r\u00e9cemment en Islande, en Nouvelle-Z\u00e9lande, aux Philippines ou encore dans certaines zones volcaniques des \u00c9tats-Unis.<\/p>\n<p>Ces ph\u00e9nom\u00e8nes restent parmi les plus dangereux du volcanisme car ils peuvent survenir brutalement et projeter des blocs rocheux \u00e0 plusieurs kilom\u00e8tres.<\/p>\n<p><strong>Une rencontre entre deux forces de la nature<\/strong><\/p>\n<p>Les maars rappellent que les paysages les plus paisibles cachent parfois une histoire d&rsquo;une violence extraordinaire. Derri\u00e8re les eaux calmes du lac du Bouchet ou du lac Pavin se cache le souvenir d&rsquo;explosions capables de remodeler enti\u00e8rement un territoire en quelques heures.<\/p>\n<p>Ces crat\u00e8res remplis d&rsquo;eau constituent aujourd&rsquo;hui des laboratoires naturels pr\u00e9cieux pour les g\u00e9ologues, les climatologues et les volcanologues, tout en offrant certains des paysages les plus remarquables du patrimoine volcanique fran\u00e7ais.<\/p>\n<p><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" data-attachment-id=\"28949\" data-permalink=\"https:\/\/www.laterredufutur.com\/accueil\/les-maars-ces-crateres-geants-nes-dune-rencontre-explosive-entre-leau-et-le-feu\/lac-issu-dun-maar-volcanique-lac-du-bouchet\/\" data-orig-file=\"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2026\/07\/Lac-issu-dun-maar-volcanique-lac-du-bouchet.jpg?fit=1536%2C1024&amp;ssl=1\" data-orig-size=\"1536,1024\" data-comments-opened=\"0\" data-image-meta=\"{&quot;aperture&quot;:&quot;0&quot;,&quot;credit&quot;:&quot;&quot;,&quot;camera&quot;:&quot;&quot;,&quot;caption&quot;:&quot;&quot;,&quot;created_timestamp&quot;:&quot;0&quot;,&quot;copyright&quot;:&quot;&quot;,&quot;focal_length&quot;:&quot;0&quot;,&quot;iso&quot;:&quot;0&quot;,&quot;shutter_speed&quot;:&quot;0&quot;,&quot;title&quot;:&quot;&quot;,&quot;orientation&quot;:&quot;0&quot;,&quot;alt&quot;:&quot;&quot;}\" data-image-title=\"Lac issu d&amp;rsquo;un maar volcanique lac du bouchet\" data-image-description=\"\" data-image-caption=\"\" data-large-file=\"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2026\/07\/Lac-issu-dun-maar-volcanique-lac-du-bouchet.jpg?fit=800%2C533&amp;ssl=1\" class=\"aligncenter wp-image-28949 size-large\" src=\"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2026\/07\/Lac-issu-dun-maar-volcanique-lac-du-bouchet.jpg?resize=800%2C533&#038;ssl=1\" alt=\"\" width=\"800\" height=\"533\" srcset=\"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2026\/07\/Lac-issu-dun-maar-volcanique-lac-du-bouchet.jpg?resize=800%2C533&amp;ssl=1 800w, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2026\/07\/Lac-issu-dun-maar-volcanique-lac-du-bouchet.jpg?resize=300%2C200&amp;ssl=1 300w, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2026\/07\/Lac-issu-dun-maar-volcanique-lac-du-bouchet.jpg?resize=80%2C53&amp;ssl=1 80w, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2026\/07\/Lac-issu-dun-maar-volcanique-lac-du-bouchet.jpg?resize=768%2C512&amp;ssl=1 768w, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2026\/07\/Lac-issu-dun-maar-volcanique-lac-du-bouchet.jpg?resize=1226%2C817&amp;ssl=1 1226w, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2026\/07\/Lac-issu-dun-maar-volcanique-lac-du-bouchet.jpg?resize=928%2C619&amp;ssl=1 928w, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2026\/07\/Lac-issu-dun-maar-volcanique-lac-du-bouchet.jpg?resize=480%2C320&amp;ssl=1 480w, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2026\/07\/Lac-issu-dun-maar-volcanique-lac-du-bouchet.jpg?w=1536&amp;ssl=1 1536w\" sizes=\"auto, (max-width: 800px) 100vw, 800px\" \/><\/p>\n<p>Adaptation Terra Projects&nbsp;<\/p>\n<p class=\"bawpvc-ajax-counter\" data-id=\"28943\">(6)<\/p>\n<!--CusAds0-->\n<div style=\"font-size: 0px; height: 0px; line-height: 0px; margin: 0; padding: 0; clear: both;\"><\/div>","protected":false},"excerpt":{"rendered":"<p>Les maars : quand l&rsquo;eau et le feu fa\u00e7onnent la Terre Pendant des millions d&rsquo;ann\u00e9es, les volcans ont model\u00e9 notre&#8230;<\/p>\n","protected":false},"author":1,"featured_media":28949,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_exactmetrics_skip_tracking":false,"_exactmetrics_sitenote_active":false,"_exactmetrics_sitenote_note":"","_exactmetrics_sitenote_category":0,"ngg_post_thumbnail":0,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_feature_clip_id":0,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2},"jetpack_post_was_ever_published":false},"categories":[19],"tags":[374,671,3178,8357,48],"class_list":["post-28943","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-seismes-et-volcans","tag-eruption","tag-explosion","tag-lac","tag-maars","tag-volcan","wpcat-19-id"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2026\/07\/Lac-issu-dun-maar-volcanique-lac-du-bouchet.jpg?fit=1536%2C1024&ssl=1","jetpack_shortlink":"https:\/\/wp.me\/p631RN-7wP","jetpack-related-posts":[{"id":939,"url":"https:\/\/www.laterredufutur.com\/accueil\/les-minimas-dactivite-solaire-a-lorigine-dun-evenement-climatique-dans-lage-de-fer-pre-romain\/","url_meta":{"origin":28943,"position":0},"title":"Les minimas d&rsquo;activit\u00e9 solaire \u00e0 l&rsquo;origine d&rsquo;un \u00e9v\u00e8nement climatique dans l&rsquo;\u00e2ge de fer pr\u00e9-romain","author":"Admin","date":"3 juin 2012","format":false,"excerpt":"Une \u00e9quipe de chercheurs europ\u00e9ens a d\u00e9couvert qu'un grand minimum d'activit\u00e9 solaire peut affecter les conditions m\u00e9t\u00e9orologiques. Des scientifiques du centre allemand de recherches en g\u00e9osciences (GFZ), en collaboration avec des coll\u00e8gues n\u00e9erlandais et su\u00e9dois, ont apport\u00e9 des preuves sur le rapport entre un climat\/activit\u00e9 solaire sur plusieurs centaines d'ann\u00e9es.\u2026","rel":"","context":"Dans &quot;Climat&quot;","block_context":{"text":"Climat","link":"https:\/\/www.laterredufutur.com\/accueil\/sujets\/climat\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2012\/04\/soleil-calme.jpg?fit=225%2C225&ssl=1&resize=350%2C200","width":350,"height":200},"classes":[]},{"id":2762,"url":"https:\/\/www.laterredufutur.com\/accueil\/que-se-passe-t-il-dans-le-massif-central\/","url_meta":{"origin":28943,"position":1},"title":"Que se passe t-il dans le massif central ?","author":"Admin","date":"28 mars 2005","format":false,"excerpt":"On constate, au sud est de Montlu\u00e7on, une activit\u00e9 sismique particuli\u00e8rement importante depuis le d\u00e9but de l'ann\u00e9e 2002. Cette activit\u00e9 est caract\u00e9ris\u00e9e par une quarantaine petits s\u00e9ismes d'une magnitude inf\u00e9rieure \u00e0 3. Ils sont situ\u00e9s \u00e0 une profondeur de 5 Km le long de failles li\u00e9es au sillon houiller. En\u2026","rel":"","context":"Dans &quot;Seismes\/Volcans&quot;","block_context":{"text":"Seismes\/Volcans","link":"https:\/\/www.laterredufutur.com\/accueil\/sujets\/seismes-et-volcans\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2016\/02\/seismes.jpg?fit=900%2C600&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2016\/02\/seismes.jpg?fit=900%2C600&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2016\/02\/seismes.jpg?fit=900%2C600&ssl=1&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2016\/02\/seismes.jpg?fit=900%2C600&ssl=1&resize=700%2C400 2x"},"classes":[]},{"id":4372,"url":"https:\/\/www.laterredufutur.com\/accueil\/les-volcans-du-massif-central-se-reveillaient-ils\/","url_meta":{"origin":28943,"position":2},"title":"Les Volcans du Massif Central se r\u00e9veillaient ils ?","author":"Admin","date":"1 avril 2008","format":false,"excerpt":"La synth\u00e8se des donn\u00e9es g\u00e9ologiques montre une \u00e9volution tout \u00e0 fait diff\u00e9rente entre le nord et le sud du Massif Central. Le nord du Massif Central, o\u00f9 s\u2019est d\u00e9roul\u00e9e l'excursion de Limagne, est principalement caract\u00e9ris\u00e9 \u00e0 l\u2019Oligoc\u00e8ne par un fort amincissement crustal, la formation de foss\u00e9 d\u2019effondrement au niveau de\u2026","rel":"","context":"Dans &quot;Seismes\/Volcans&quot;","block_context":{"text":"Seismes\/Volcans","link":"https:\/\/www.laterredufutur.com\/accueil\/sujets\/seismes-et-volcans\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.laterredufutur.com\/spaw\/images\/tremblementsdeterre.jpg?resize=350%2C200","width":350,"height":200},"classes":[]},{"id":22699,"url":"https:\/\/www.laterredufutur.com\/accueil\/le-volcan-taal-est-entre-a-nouveau-en-eruption\/","url_meta":{"origin":28943,"position":3},"title":"Le volcan Taal est entr\u00e9 \u00e0 nouveau en \u00e9ruption","author":"Admin","date":"1 juillet 2021","format":false,"excerpt":"Le Taal, deuxi\u00e8me volcan le plus actif des Philippines, est entr\u00e9 en \u00e9ruption jeudi, crachant un panache de fum\u00e9e d\u2019un kilom\u00e8tre de haut, ont indiqu\u00e9 des scientifiques de l\u2019Institut national de vulcanologie et de sismologie (Phivolcs). Cette courte \u00e9ruption, dite \u00ab phr\u00e9ato-magmatique \u00bb, s\u2019est accompagn\u00e9e d\u2019un panache compos\u00e9 de vapeur\u2026","rel":"","context":"Dans &quot;Seismes\/Volcans&quot;","block_context":{"text":"Seismes\/Volcans","link":"https:\/\/www.laterredufutur.com\/accueil\/sujets\/seismes-et-volcans\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2021\/07\/volcan-taal-juillet2021.jpg?fit=1200%2C870&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2021\/07\/volcan-taal-juillet2021.jpg?fit=1200%2C870&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2021\/07\/volcan-taal-juillet2021.jpg?fit=1200%2C870&ssl=1&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2021\/07\/volcan-taal-juillet2021.jpg?fit=1200%2C870&ssl=1&resize=700%2C400 2x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2021\/07\/volcan-taal-juillet2021.jpg?fit=1200%2C870&ssl=1&resize=1050%2C600 3x"},"classes":[]},{"id":26172,"url":"https:\/\/www.laterredufutur.com\/accueil\/le-sol-vient-dexploser-devant-les-touristes-a-yellowstone-voici-pourquoi\/","url_meta":{"origin":28943,"position":4},"title":"Le sol vient d&rsquo;exploser devant les touristes \u00e0 Yellowstone. Voici pourquoi","author":"Admin","date":"24 juillet 2024","format":false,"excerpt":"Perch\u00e9 au sommet d'un supervolcan qui r\u00e9chauffe et acidifie les r\u00e9seaux de r\u00e9servoirs d'eau souterrains, le parc national de Yellowstone pr\u00e9sente certains des sites naturels les plus spectaculaires des \u00c9tats-Unis. Mais son \u00e9tonnante beaut\u00e9 n\u2019est pas sans danger. Une explosion survenue le 23 juillet \u00e0 10h19 heure locale montre exactement\u2026","rel":"","context":"Dans &quot;Seismes\/Volcans&quot;","block_context":{"text":"Seismes\/Volcans","link":"https:\/\/www.laterredufutur.com\/accueil\/sujets\/seismes-et-volcans\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2024\/07\/Yellowstone-Explosion.jpg?fit=1024%2C415&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2024\/07\/Yellowstone-Explosion.jpg?fit=1024%2C415&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2024\/07\/Yellowstone-Explosion.jpg?fit=1024%2C415&ssl=1&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2024\/07\/Yellowstone-Explosion.jpg?fit=1024%2C415&ssl=1&resize=700%2C400 2x"},"classes":[]},{"id":24936,"url":"https:\/\/www.laterredufutur.com\/accueil\/un-monde-de-volcans\/","url_meta":{"origin":28943,"position":5},"title":"Un monde de Volcans","author":"Admin","date":"7 mai 2023","format":false,"excerpt":"Les volcans sont des montagnes form\u00e9es par l'accumulation de magma et de cendres qui ont \u00e9t\u00e9 expuls\u00e9s de la Terre \u00e0 travers une ouverture dans la cro\u00fbte terrestre. Bien qu'ils puissent sembler impressionnants et majestueux, les volcans sont \u00e9galement des forces destructrices de la nature et peuvent causer des dommages\u2026","rel":"","context":"Dans &quot;Monde Futur&quot;","block_context":{"text":"Monde Futur","link":"https:\/\/www.laterredufutur.com\/accueil\/sujets\/monde-futur\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2021\/09\/Fagradalsfjall-volcan.jpg?fit=1048%2C450&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2021\/09\/Fagradalsfjall-volcan.jpg?fit=1048%2C450&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2021\/09\/Fagradalsfjall-volcan.jpg?fit=1048%2C450&ssl=1&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2021\/09\/Fagradalsfjall-volcan.jpg?fit=1048%2C450&ssl=1&resize=700%2C400 2x"},"classes":[]}],"jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/posts\/28943","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/comments?post=28943"}],"version-history":[{"count":6,"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/posts\/28943\/revisions"}],"predecessor-version":[{"id":28953,"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/posts\/28943\/revisions\/28953"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/media\/28949"}],"wp:attachment":[{"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/media?parent=28943"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/categories?post=28943"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/tags?post=28943"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}