{"id":14836,"date":"2018-12-20T11:56:11","date_gmt":"2018-12-20T11:56:11","guid":{"rendered":"http:\/\/volcanx.cluster031.hosting.ovh.net\/lo-que-sabemos-sobre-los-volcanes-submarinos\/"},"modified":"2021-09-16T10:10:55","modified_gmt":"2021-09-16T08:10:55","slug":"ce-que-nous-savons-des-volcans-sous-marins","status":"publish","type":"post","link":"https:\/\/volcanofoundation.org\/fr\/ce-que-nous-savons-des-volcans-sous-marins\/","title":{"rendered":"CE QUE NOUS SAVONS DES VOLCANS SOUS-MARINS"},"content":{"rendered":"<div id=\"av_section_1\" class=\"avia-section av-jpmm5s20-a918b1472ec85c878d930078b8249354 main_color avia-section-default avia-no-border-styling  avia-builder-el-0  el_before_av_one_full  avia-builder-el-first  avia-full-stretch av-parallax-section avia-bg-style-parallax av-minimum-height av-minimum-height-50 av-height-50  container_wrap fullsize\" data-section-bg-repeat=\"stretch\" data-av_minimum_height_pc=\"50\" data-av_min_height_opt=\"50\"><div class=\"av-parallax\" data-avia-parallax-ratio=\"0.3\"><div class=\"av-parallax-inner main_color avia-full-stretch\"><\/div><\/div><div class=\"container av-section-cont-open\"><main role=\"main\" itemprop=\"mainContentOfPage\" class=\"template-page content  av-content-full alpha units\"><div class=\"post-entry post-entry-type-page post-entry-14836\"><div class=\"entry-content-wrapper clearfix\">\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-4lysb-e2a4178e7414917cbfc41c7bd96620ba\">\n.flex_column.av-4lysb-e2a4178e7414917cbfc41c7bd96620ba{\nborder-radius:0px 0px 0px 0px;\npadding:0px 0px 0px 0px;\n}\n<\/style>\n<div class=\"flex_column av-4lysb-e2a4178e7414917cbfc41c7bd96620ba av_one_full  avia-builder-el-1  avia-builder-el-no-sibling  first flex_column_div av-zero-column-padding  \"><style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-jqxnsnjt-dc056b5a7560031f1ca049695b6fea3e\">\n#top .av-special-heading.av-jqxnsnjt-dc056b5a7560031f1ca049695b6fea3e{\npadding-bottom:10px;\ncolor:#000000;\nfont-size:4vw;\n}\nbody .av-special-heading.av-jqxnsnjt-dc056b5a7560031f1ca049695b6fea3e .av-special-heading-tag .heading-char{\nfont-size:25px;\n}\n#top #wrap_all .av-special-heading.av-jqxnsnjt-dc056b5a7560031f1ca049695b6fea3e .av-special-heading-tag{\nfont-size:4vw;\n}\n.av-special-heading.av-jqxnsnjt-dc056b5a7560031f1ca049695b6fea3e .special-heading-inner-border{\nborder-color:#000000;\n}\n.av-special-heading.av-jqxnsnjt-dc056b5a7560031f1ca049695b6fea3e .av-subheading{\nfont-size:30px;\n}\n\n@media only screen and (min-width: 480px) and (max-width: 767px){ \n#top #wrap_all .av-special-heading.av-jqxnsnjt-dc056b5a7560031f1ca049695b6fea3e .av-special-heading-tag{\nfont-size:0.8em;\n}\n}\n\n@media only screen and (max-width: 479px){ \n#top #wrap_all .av-special-heading.av-jqxnsnjt-dc056b5a7560031f1ca049695b6fea3e .av-special-heading-tag{\nfont-size:0.8em;\n}\n}\n<\/style>\n<div class=\"av-special-heading av-jqxnsnjt-dc056b5a7560031f1ca049695b6fea3e av-special-heading-h1 custom-color-heading blockquote modern-quote modern-centered  avia-builder-el-2  avia-builder-el-no-sibling  av-inherit-size av-linked-heading\"><h1 class=\"av-special-heading-tag \" itemprop=\"headline\">LES VOLCANS SOUS-MARINS<\/h1><div class=\"av_custom_color av-subheading av-subheading_below\"><p>BEAUCOUP PLUS PROCHE QUE VOUS NE LE PENSIEZ<\/p>\n<\/div><div class=\"special-heading-border\"><div class=\"special-heading-inner-border\"><\/div><\/div><\/div><\/div>\n<\/div><\/div><\/main><!-- close content main element --><\/div><\/div><div id=\"after_section_1\" class=\"main_color av_default_container_wrap container_wrap fullsize\"><div class=\"container av-section-cont-open\"><div class=\"template-page content  av-content-full alpha units\"><div class=\"post-entry post-entry-type-page post-entry-14836\"><div class=\"entry-content-wrapper clearfix\">\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-rb2oj-eec70bfdf6e487bd03455fa6d9af795c\">\n.flex_column.av-rb2oj-eec70bfdf6e487bd03455fa6d9af795c{\nborder-radius:0px 0px 0px 0px;\npadding:0px 0px 0px 0px;\n}\n<\/style>\n<div class=\"flex_column av-rb2oj-eec70bfdf6e487bd03455fa6d9af795c av_one_full  avia-builder-el-3  el_after_av_section  el_before_av_one_half  avia-builder-el-first  first flex_column_div av-zero-column-padding  \"><section class=\"av_textblock_section av-n449n-09a6194f1e6fd0d47dea222c3da43d11 \" itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/BlogPosting\" itemprop=\"blogPost\"><div class=\"avia_textblock\" itemprop=\"text\"><p>L&rsquo;une des plus belles contradictions de notre plan&egrave;te : l&rsquo;eau et le feu r&eacute;unis.<\/p>\n<p>Les volcans sous-marins apparaissent lorsqu&rsquo;il y a une <a class=\"glossaryLink\"  aria-describedby=\"tt\"  data-cmtooltip=\"&lt;div class=glossaryItemTitle&gt;FISSURE&lt;\/div&gt;&lt;div class=glossaryItemBody&gt;En g&eacute;ologie, une fissure est une fracture ou une fissure dans la roche le long de laquelle il y a une s&eacute;paration distincte ; les fissures sont souvent remplies de mat&eacute;riaux min&eacute;raux. Sur les volcans, une fissure est une fracture allong&eacute;e ou une fissure &agrave; la surface d&amp;#039;o&ugrave; la lave &eacute;clate. Les &eacute;ruptions de fisuration diminuent g&eacute;n&eacute;ralement jusqu&amp;#039;&agrave; un &eacute;vent central apr&egrave;s une p&eacute;riode d&amp;#039;heures ou de jours. &Agrave; l&amp;#039;occasion, la lave se renverse dans le sol en se d&eacute;versant dans une fissure ou une fissure &eacute;ruptive ouverte, un processus appel&eacute; drainage ; parfois, la lave se d&eacute;verse dans la m&ecirc;me fissure d&amp;#039;o&ugrave; elle a &eacute;clat&eacute;.&lt;\/div&gt;\"  href=\"https:\/\/volcanofoundation.org\/fr\/glossary\/fissure-fr\/\"  data-gt-translate-attributes='[{\"attribute\":\"data-cmtooltip\", \"format\":\"html\"}]'  tabindex='0' role='link'>fissure<\/a> dans le fond de l&rsquo;oc&eacute;an par laquelle <strong>le <a class=\"glossaryLink\"  aria-describedby=\"tt\"  data-cmtooltip=\"&lt;div class=glossaryItemTitle&gt;MAGMA&lt;\/div&gt;&lt;div class=glossaryItemBody&gt;Roche fondue sous la surface de la Terre.&lt;\/div&gt;\"  href=\"https:\/\/volcanofoundation.org\/fr\/glossary\/magma-fr\/\"  data-gt-translate-attributes='[{\"attribute\":\"data-cmtooltip\", \"format\":\"html\"}]'  tabindex='0' role='link'>magma<\/a> peut entrer en &eacute;ruption.<\/strong> Comme les volcans terrestres, un <a class=\"glossaryLink\" aria-describedby=\"tt\" data-cmtooltip=\"&lt;div class=glossaryItemTitle&gt;VOLCAN SOUS-MARIN&lt;\/div&gt;&lt;div class=glossaryItemBody&gt;Un volcan situ&eacute; sous le niveau de la mer sur le fond de l&amp;#039;oc&eacute;an, g&eacute;n&eacute;ralement compos&eacute; de basalte.&lt;\/div&gt;\" href=\"https:\/\/volcanofoundation.org\/fr\/glossary\/volcan-sous-marin-fr\/\" data-gt-translate-attributes='[{\"attribute\":\"data-cmtooltip\", \"format\":\"html\"}]' tabindex=\"0\" role=\"link\">volcan sous-marin<\/a> peut cracher du <a class=\"glossaryLink\"  aria-describedby=\"tt\"  data-cmtooltip=\"&lt;div class=glossaryItemTitle&gt;MAGMA&lt;\/div&gt;&lt;div class=glossaryItemBody&gt;Roche fondue sous la surface de la Terre.&lt;\/div&gt;\"  href=\"https:\/\/volcanofoundation.org\/fr\/glossary\/magma-fr\/\"  data-gt-translate-attributes='[{\"attribute\":\"data-cmtooltip\", \"format\":\"html\"}]'  tabindex='0' role='link'>magma<\/a> ainsi que des vapeurs et des gaz.<\/p>\n<p>Les scientifiques estiment qu&rsquo;il existe des <strong>milliers de volcans sous-marins actifs<\/strong> dans le monde, qui expulsent environ 75 % de leur <a class=\"glossaryLink\"  aria-describedby=\"tt\"  data-cmtooltip=\"&lt;div class=glossaryItemTitle&gt;MAGMA&lt;\/div&gt;&lt;div class=glossaryItemBody&gt;Roche fondue sous la surface de la Terre.&lt;\/div&gt;\"  href=\"https:\/\/volcanofoundation.org\/fr\/glossary\/magma-fr\/\"  data-gt-translate-attributes='[{\"attribute\":\"data-cmtooltip\", \"format\":\"html\"}]'  tabindex='0' role='link'>magma<\/a> annuel. En outre, les &eacute;ruptions volcaniques sous-marines contribuent &agrave; la cr&eacute;ation d&rsquo;une nouvelle <a class=\"glossaryLink\"  aria-describedby=\"tt\"  data-cmtooltip=\"&lt;div class=glossaryItemTitle&gt;CRO&Ucirc;TE&lt;\/div&gt;&lt;div class=glossaryItemBody&gt;La cro&ucirc;te est la couche la plus ext&eacute;rieure majeure de la terre, allant d&amp;#039;environ 10 &agrave; 65 km d&amp;#039;&eacute;paisseur dans le monde entier. Les 15 &agrave; 35 km sup&eacute;rieurs de cro&ucirc;te sont suffisamment fragiles pour produire des tremblements de terre.&lt;\/div&gt;\"  href=\"https:\/\/volcanofoundation.org\/fr\/glossary\/croute-fr\/\"  data-gt-translate-attributes='[{\"attribute\":\"data-cmtooltip\", \"format\":\"html\"}]'  tabindex='0' role='link'>cro&ucirc;te<\/a>.<\/p>\n<p>La plupart des volcans sous-marins se trouvent dans des zones o&ugrave; les plaques oc&eacute;aniques divergent, comme la dorsale atlantique. Un petit pourcentage de volcans sous-marins est ind&eacute;pendant des zones divergentes et se produit &agrave; cause des points chauds bien connus, comme c&rsquo;est le cas des &icirc;les Hawa&iuml;, o&ugrave; il existe un point fixe par lequel le <a class=\"glossaryLink\"  aria-describedby=\"tt\"  data-cmtooltip=\"&lt;div class=glossaryItemTitle&gt;MAGMA&lt;\/div&gt;&lt;div class=glossaryItemBody&gt;Roche fondue sous la surface de la Terre.&lt;\/div&gt;\"  href=\"https:\/\/volcanofoundation.org\/fr\/glossary\/magma-fr\/\"  data-gt-translate-attributes='[{\"attribute\":\"data-cmtooltip\", \"format\":\"html\"}]'  tabindex='0' role='link'>magma<\/a> sort et sur lequel la <a class=\"glossaryLink\"  aria-describedby=\"tt\"  data-cmtooltip=\"&lt;div class=glossaryItemTitle&gt;CRO&Ucirc;TE&lt;\/div&gt;&lt;div class=glossaryItemBody&gt;La cro&ucirc;te est la couche la plus ext&eacute;rieure majeure de la terre, allant d&amp;#039;environ 10 &agrave; 65 km d&amp;#039;&eacute;paisseur dans le monde entier. Les 15 &agrave; 35 km sup&eacute;rieurs de cro&ucirc;te sont suffisamment fragiles pour produire des tremblements de terre.&lt;\/div&gt;\"  href=\"https:\/\/volcanofoundation.org\/fr\/glossary\/croute-fr\/\"  data-gt-translate-attributes='[{\"attribute\":\"data-cmtooltip\", \"format\":\"html\"}]'  tabindex='0' role='link'>cro&ucirc;te<\/a> terrestre se d&eacute;place en cr&eacute;ant de nouveaux volcans, d&rsquo;o&ugrave;, par exemple, l&rsquo;alignement des &icirc;les Hawa&iuml;.<\/p>\n<\/div><\/section><\/div>\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-rb2oj-eec70bfdf6e487bd03455fa6d9af795c\">\n.flex_column.av-rb2oj-eec70bfdf6e487bd03455fa6d9af795c{\nborder-radius:0px 0px 0px 0px;\npadding:0px 0px 0px 0px;\n}\n<\/style>\n<div class=\"flex_column av-rb2oj-eec70bfdf6e487bd03455fa6d9af795c av_one_half  avia-builder-el-5  el_after_av_one_full  el_before_av_one_half  first flex_column_div av-zero-column-padding  column-top-margin\"><section class=\"av_textblock_section av-jpms6516-a99a40b4e196f6ac158b4d89ac4bebbd \" itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/BlogPosting\" itemprop=\"blogPost\"><div class=\"avia_textblock\" itemprop=\"text\"><p>Un bon indicateur de <strong>l&rsquo;activit&eacute; volcanique<\/strong> dans la r&eacute;gion est la pr&eacute;sence de fumerolles ou de chemin&eacute;es hydrothermales, qui indiquent qu&rsquo;il s&rsquo;agit d&rsquo;une zone o&ugrave; le <a class=\"glossaryLink\"  aria-describedby=\"tt\"  data-cmtooltip=\"&lt;div class=glossaryItemTitle&gt;MAGMA&lt;\/div&gt;&lt;div class=glossaryItemBody&gt;Roche fondue sous la surface de la Terre.&lt;\/div&gt;\"  href=\"https:\/\/volcanofoundation.org\/fr\/glossary\/magma-fr\/\"  data-gt-translate-attributes='[{\"attribute\":\"data-cmtooltip\", \"format\":\"html\"}]'  tabindex='0' role='link'>magma<\/a> est relativement proche de la surface de la terre, il est donc tr&egrave;s probable qu&rsquo;un <a class=\"glossaryLink\" aria-describedby=\"tt\" data-cmtooltip=\"&lt;div class=glossaryItemTitle&gt;VOLCAN SOUS-MARIN&lt;\/div&gt;&lt;div class=glossaryItemBody&gt;Un volcan situ&eacute; sous le niveau de la mer sur le fond de l&amp;#039;oc&eacute;an, g&eacute;n&eacute;ralement compos&eacute; de basalte.&lt;\/div&gt;\" href=\"https:\/\/volcanofoundation.org\/fr\/glossary\/volcan-sous-marin-fr\/\" data-gt-translate-attributes='[{\"attribute\":\"data-cmtooltip\", \"format\":\"html\"}]' tabindex=\"0\" role=\"link\">volcan sous-marin<\/a> existe &agrave; proximit&eacute;.<\/p>\n<p>Le type de <a class=\"glossaryLink\" aria-describedby=\"tt\" data-cmtooltip=\"&lt;div class=glossaryItemTitle&gt;VOLCAN SOUS-MARIN&lt;\/div&gt;&lt;div class=glossaryItemBody&gt;Un volcan situ&eacute; sous le niveau de la mer sur le fond de l&amp;#039;oc&eacute;an, g&eacute;n&eacute;ralement compos&eacute; de basalte.&lt;\/div&gt;\" href=\"https:\/\/volcanofoundation.org\/fr\/glossary\/volcan-sous-marin-fr\/\" data-gt-translate-attributes='[{\"attribute\":\"data-cmtooltip\", \"format\":\"html\"}]' tabindex=\"0\" role=\"link\">volcan sous-marin<\/a> et d&rsquo;&eacute;ruption d&eacute;pend beaucoup de la profondeur &agrave; laquelle il se trouve, car <strong>la pression<\/strong> est un facteur tr&egrave;s important.<\/p>\n<p>Les &eacute;ruptions peuvent &ecirc;tre sporadiques ou continues dans le temps ; si elles sont continues et durent depuis longtemps, les mat&eacute;riaux volcaniques finissent par <strong>remonter &agrave; la surface et cr&eacute;er de nouvelles &icirc;les<\/strong>, comme c&rsquo;est le cas en Islande, qui se trouve juste au-dessus de la dorsale atlantique.<\/p>\n<\/div><\/section><\/div>\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-rb2oj-2190e217c81d766e3ba2d400df0f0d5c\">\n.flex_column.av-rb2oj-2190e217c81d766e3ba2d400df0f0d5c{\nborder-radius:0px 0px 0px 0px;\npadding:0px 0px 0px 0px;\n}\n<\/style>\n<div class=\"flex_column av-rb2oj-2190e217c81d766e3ba2d400df0f0d5c av_one_half  avia-builder-el-7  el_after_av_one_half  el_before_av_one_full  flex_column_div av-zero-column-padding  column-top-margin\"><style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-jpwhwasn-8ee46bc99d057f79eb6d6ef08636eace\">\n.avia-image-container.av-jpwhwasn-8ee46bc99d057f79eb6d6ef08636eace img.avia_image{\nbox-shadow:none;\n}\n.avia-image-container.av-jpwhwasn-8ee46bc99d057f79eb6d6ef08636eace .av-caption-image-overlay-bg{\nopacity:0.4;\nbackground-color:#000000;\n}\n.avia-image-container.av-jpwhwasn-8ee46bc99d057f79eb6d6ef08636eace .av-image-caption-overlay-center{\ncolor:#ffffff;\nfont-size:10px;\n}\n<\/style>\n<div class=\"avia-image-container av-jpwhwasn-8ee46bc99d057f79eb6d6ef08636eace av-styling- avia-align-center  avia-builder-el-8  avia-builder-el-no-sibling  noHover av-overlay-hover-deactivate\" itemprop=\"image\" itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/ImageObject\"><div class=\"avia-image-container-inner\"><div class=\"avia-image-overlay-wrap\"><div class=\"av-image-caption-overlay\"><div class=\"av-caption-image-overlay-bg\"><\/div><div class=\"av-image-caption-overlay-position\"><div class=\"av-image-caption-overlay-center\"><\/div><\/div><\/div><img decoding=\"async\" fetchpriority=\"high\" class=\"wp-image-562 avia-img-lazy-loading-not-562 avia_image \" src=\"https:\/\/volcanofoundation.org\/wp-content\/uploads\/2018\/12\/volcano-foundation-canarias.jpg\" alt=\"\" title=\"volcano-foundation-canarias\" height=\"432\" width=\"768\" itemprop=\"thumbnailUrl\" srcset=\"https:\/\/volcanofoundation.org\/wp-content\/uploads\/2018\/12\/volcano-foundation-canarias.jpg 768w, https:\/\/volcanofoundation.org\/wp-content\/uploads\/2018\/12\/volcano-foundation-canarias-300x169.jpg 300w, https:\/\/volcanofoundation.org\/wp-content\/uploads\/2018\/12\/volcano-foundation-canarias-705x397.jpg 705w\" sizes=\"(max-width: 768px) 100vw, 768px\"\/><\/div><\/div><\/div><\/div>\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-rb2oj-eec70bfdf6e487bd03455fa6d9af795c\">\n.flex_column.av-rb2oj-eec70bfdf6e487bd03455fa6d9af795c{\nborder-radius:0px 0px 0px 0px;\npadding:0px 0px 0px 0px;\n}\n<\/style>\n<div class=\"flex_column av-rb2oj-eec70bfdf6e487bd03455fa6d9af795c av_one_full  avia-builder-el-9  el_after_av_one_half  el_before_av_one_half  first flex_column_div av-zero-column-padding  column-top-margin\"><p>\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-t51j-b42235092d4674834634cfdbc5f0b2fc\">\n#top .av-special-heading.av-t51j-b42235092d4674834634cfdbc5f0b2fc{\npadding-bottom:10px;\n}\nbody .av-special-heading.av-t51j-b42235092d4674834634cfdbc5f0b2fc .av-special-heading-tag .heading-char{\nfont-size:25px;\n}\n.av-special-heading.av-t51j-b42235092d4674834634cfdbc5f0b2fc .av-subheading{\nfont-size:15px;\n}\n<\/style>\n<\/p><div class=\"av-special-heading av-t51j-b42235092d4674834634cfdbc5f0b2fc av-special-heading-h3 blockquote modern-quote  avia-builder-el-10  el_before_av_textblock  avia-builder-el-first  av-linked-heading\"><h3 class=\"av-special-heading-tag \" itemprop=\"headline\">Des volcans sous-marins d&eacute;couverts sur l&rsquo;&icirc;le de Tonga<\/h3><div class=\"special-heading-border\"><div class=\"special-heading-inner-border\"><\/div><\/div><\/div><br>\n<section class=\"av_textblock_section av-jpms6516-a99a40b4e196f6ac158b4d89ac4bebbd \" itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/BlogPosting\" itemprop=\"blogPost\"><div class=\"avia_textblock\" itemprop=\"text\"><p>Hawaii, Islande, Japon et Espagne.<\/p>\n<p>En Espagne, les &icirc;les Canaries regorgent de volcans, dont la plupart sont &eacute;teints. Mais au sein de l&rsquo;archipel, <strong>l&rsquo;&icirc;le d&rsquo;El Hierro<\/strong> est la plus active et en 2011, un <a class=\"glossaryLink\" aria-describedby=\"tt\" data-cmtooltip=\"&lt;div class=glossaryItemTitle&gt;VOLCAN SOUS-MARIN&lt;\/div&gt;&lt;div class=glossaryItemBody&gt;Un volcan situ&eacute; sous le niveau de la mer sur le fond de l&amp;#039;oc&eacute;an, g&eacute;n&eacute;ralement compos&eacute; de basalte.&lt;\/div&gt;\" href=\"https:\/\/volcanofoundation.org\/fr\/glossary\/volcan-sous-marin-fr\/\" data-gt-translate-attributes='[{\"attribute\":\"data-cmtooltip\", \"format\":\"html\"}]' tabindex=\"0\" role=\"link\">volcan sous-marin<\/a>, tr&egrave;s proche de la c&ocirc;te de l&rsquo;&icirc;le, est entr&eacute; en &eacute;ruption. L&rsquo;&eacute;ruption a dur&eacute; environ <strong>cinq mois<\/strong> et au cours de laquelle, on pouvait voir des vapeurs &agrave; la surface, de nombreux fragments de pierre <a class=\"glossaryLink\"  aria-describedby=\"tt\"  data-cmtooltip=\"&lt;div class=glossaryItemTitle&gt;PONCE&lt;\/div&gt;&lt;div class=glossaryItemBody&gt;&Eacute;jectas volcaniques tr&egrave;s v&eacute;siculaires, g&eacute;n&eacute;ralement de composition silicique. C&amp;#039;est essentiellement du magma qui a &eacute;t&eacute; mousseux en s&amp;#039;&eacute;chappant des gaz, puis refroidi et solidifi&eacute; lors de l&amp;#039;&eacute;ruption. La pierre ponce rhyolitique est g&eacute;n&eacute;ralement de densit&eacute; suffisamment faible pour flotter sur l&amp;#039;eau. Pr&egrave;s d&amp;#039;un &eacute;vent, la pierre ponce chaude peut s&amp;#039;accumuler et former un c&ocirc;ne de pierre ponce.&lt;\/div&gt;\"  href=\"https:\/\/volcanofoundation.org\/fr\/glossary\/ponce-fr\/\"  data-gt-translate-attributes='[{\"attribute\":\"data-cmtooltip\", \"format\":\"html\"}]'  tabindex='0' role='link'>ponce<\/a> et un changement de couleur de l&rsquo;eau d&ucirc; aux compos&eacute;s chimiques &eacute;mis par le volcan.<\/p>\n<\/div><\/section><\/div>\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-rb2oj-eec70bfdf6e487bd03455fa6d9af795c\">\n.flex_column.av-rb2oj-eec70bfdf6e487bd03455fa6d9af795c{\nborder-radius:0px 0px 0px 0px;\npadding:0px 0px 0px 0px;\n}\n<\/style>\n<div class=\"flex_column av-rb2oj-eec70bfdf6e487bd03455fa6d9af795c av_one_half  avia-builder-el-12  el_after_av_one_full  el_before_av_one_half  first flex_column_div av-zero-column-padding  column-top-margin\"><style type=\"text\/css\" 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srcset=\"https:\/\/volcanofoundation.org\/wp-content\/uploads\/2018\/12\/volcano-foundation-isla-tonga.jpg 1280w, https:\/\/volcanofoundation.org\/wp-content\/uploads\/2018\/12\/volcano-foundation-isla-tonga-300x240.jpg 300w, https:\/\/volcanofoundation.org\/wp-content\/uploads\/2018\/12\/volcano-foundation-isla-tonga-1030x824.jpg 1030w, https:\/\/volcanofoundation.org\/wp-content\/uploads\/2018\/12\/volcano-foundation-isla-tonga-768x614.jpg 768w, https:\/\/volcanofoundation.org\/wp-content\/uploads\/2018\/12\/volcano-foundation-isla-tonga-705x564.jpg 705w, https:\/\/volcanofoundation.org\/wp-content\/uploads\/2018\/12\/volcano-foundation-isla-tonga-1125x900.jpg 1125w\" sizes=\"(max-width: 1280px) 100vw, 1280px\"\/><\/div><\/div><\/div><\/div>\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-rb2oj-2190e217c81d766e3ba2d400df0f0d5c\">\n.flex_column.av-rb2oj-2190e217c81d766e3ba2d400df0f0d5c{\nborder-radius:0px 0px 0px 0px;\npadding:0px 0px 0px 0px;\n}\n<\/style>\n<div class=\"flex_column av-rb2oj-2190e217c81d766e3ba2d400df0f0d5c av_one_half  avia-builder-el-14  el_after_av_one_half  el_before_av_hr  flex_column_div av-zero-column-padding  column-top-margin\"><style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-jpwhwasn-fc705917001b970dd44a4f1edfeeba87\">\n.avia-image-container.av-jpwhwasn-fc705917001b970dd44a4f1edfeeba87 img.avia_image{\nbox-shadow:none;\n}\n.avia-image-container.av-jpwhwasn-fc705917001b970dd44a4f1edfeeba87 .av-image-caption-overlay-center{\ncolor:#ffffff;\n}\n<\/style>\n<div class=\"avia-image-container av-jpwhwasn-fc705917001b970dd44a4f1edfeeba87 av-styling- avia-align-center  avia-builder-el-15  avia-builder-el-no-sibling \" itemprop=\"image\" itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/ImageObject\"><div class=\"avia-image-container-inner\"><div class=\"avia-image-overlay-wrap\"><img decoding=\"async\" fetchpriority=\"high\" class=\"wp-image-572 avia-img-lazy-loading-not-572 avia_image \" src=\"https:\/\/volcanofoundation.org\/wp-content\/uploads\/2018\/12\/volcano-foundation-isla-tonga02.jpg\" alt=\"\" title=\"volcano-foundation-isla-tonga02\" height=\"1024\" width=\"1280\" itemprop=\"thumbnailUrl\" srcset=\"https:\/\/volcanofoundation.org\/wp-content\/uploads\/2018\/12\/volcano-foundation-isla-tonga02.jpg 1280w, https:\/\/volcanofoundation.org\/wp-content\/uploads\/2018\/12\/volcano-foundation-isla-tonga02-300x240.jpg 300w, https:\/\/volcanofoundation.org\/wp-content\/uploads\/2018\/12\/volcano-foundation-isla-tonga02-1030x824.jpg 1030w, https:\/\/volcanofoundation.org\/wp-content\/uploads\/2018\/12\/volcano-foundation-isla-tonga02-768x614.jpg 768w, https:\/\/volcanofoundation.org\/wp-content\/uploads\/2018\/12\/volcano-foundation-isla-tonga02-705x564.jpg 705w, https:\/\/volcanofoundation.org\/wp-content\/uploads\/2018\/12\/volcano-foundation-isla-tonga02-1125x900.jpg 1125w\" sizes=\"(max-width: 1280px) 100vw, 1280px\"\/><\/div><\/div><\/div><\/div>\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-jpwkkn3m-0f641ec3151a78ab77c664af86f07246\">\n#top .hr.av-jpwkkn3m-0f641ec3151a78ab77c664af86f07246{\nmargin-top:30px;\nmargin-bottom:30px;\n}\n.hr.av-jpwkkn3m-0f641ec3151a78ab77c664af86f07246 .hr-inner{\nwidth:150px;\nborder-color:#000000;\n}\n<\/style>\n<div class=\"hr av-jpwkkn3m-0f641ec3151a78ab77c664af86f07246 hr-custom  avia-builder-el-16  el_after_av_one_half  el_before_av_textblock  hr-left hr-icon-no\"><span class=\"hr-inner inner-border-av-border-thin\"><span class=\"hr-inner-style\"><\/span><\/span><\/div>\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-jpms6516-11356034d2f1d3b6bca9338fbb4fa268\">\n#top .av_textblock_section.av-jpms6516-11356034d2f1d3b6bca9338fbb4fa268 .avia_textblock{\nfont-size:10px;\n}\n<\/style>\n<section class=\"av_textblock_section av-jpms6516-11356034d2f1d3b6bca9338fbb4fa268 \" itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/BlogPosting\" itemprop=\"blogPost\"><div class=\"avia_textblock\" itemprop=\"text\"><p>Sources: Images de&nbsp; <a href=\"http:\/\/blog.nuestroclima.com\/erupcion-de-un-volcan-submarino-en-tonga-pacifico-sur\/\">nuestroclima.com<\/a> et <a href=\"http:\/\/www.fotosaereasdecanarias.com\/home\/el-hierro\/especial-volcan-submarino\">fotosaereasdecanarias.com<\/a><\/p>\n<\/div><\/section>\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-6k77tn-abae8454b960ce77d26daae7c94bbfbf\">\n.flex_column.av-6k77tn-abae8454b960ce77d26daae7c94bbfbf{\nborder-radius:0px 0px 0px 0px;\npadding:0 0 0 0;\n}\n<\/style>\n<div class=\"flex_column av-6k77tn-abae8454b960ce77d26daae7c94bbfbf av_one_full  avia-builder-el-18  el_after_av_textblock  avia-builder-el-last  first flex_column_div av-zero-column-padding  column-top-margin\"><section class=\"av_textblock_section av-kqc31clw-68fbc04fa3076e236e48b3887a4ac6b2 \" itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/BlogPosting\" itemprop=\"blogPost\"><div class=\"avia_textblock\" itemprop=\"text\"><h3 style=\"text-align: center;\"><span style=\"color: #f5312a;\"><em class=\"encabezado-news\"><strong>POSTES CONNEXES<\/strong><\/em><\/span><\/h3>\n<\/div><\/section><br>\n\n<style type=\"text\/css\" data-created_by=\"avia_inline_auto\" id=\"style-css-av-4w5817-032d5dbb2f743e6aaef33e8f4d8b93b3\">\n#top .hr.hr-invisible.av-4w5817-032d5dbb2f743e6aaef33e8f4d8b93b3{\nheight:20px;\n}\n<\/style>\n<div class=\"hr av-4w5817-032d5dbb2f743e6aaef33e8f4d8b93b3 hr-invisible  avia-builder-el-20  el_after_av_textblock  el_before_av_postslider \"><span class=\"hr-inner \"><span class=\"hr-inner-style\"><\/span><\/span><\/div><br>\n<div data-slideshow-options='{\"animation\":\"fade\",\"autoplay\":false,\"loop_autoplay\":\"once\",\"interval\":\"5\",\"loop_manual\":\"manual-endless\",\"autoplay_stopper\":false,\"noNavigation\":false,\"show_slide_delay\":90}' class=\"avia-content-slider avia-content-slider-active avia-content-slider1 avia-content-slider-odd  avia-builder-el-21  el_after_av_hr  avia-builder-el-last  av-slideshow-ui av-control-default   av-no-slider-navigation av-slideshow-manual av-loop-once av-loop-manual-endless \" itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/Blog\"><div class=\"avia-content-slider-inner\"><div class=\"slide-entry-wrap\"><article class=\"slide-entry flex_column  post-entry post-entry-18850 slide-entry-overview slide-loop-1 slide-parity-odd  av_one_third first real-thumbnail posttype-post post-format-standard\" itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/BlogPosting\" itemprop=\"blogPost\"><a href=\"https:\/\/volcanofoundation.org\/fr\/nous-appuyons-la-formation-des-scientifiques-de-terrain\/\" data-rel=\"slide-1\" class=\"slide-image\" title=\"NOUS APPUYONS LA FORMATION DES SCIENTIFIQUES DE TERRAIN\"><img decoding=\"async\" fetchpriority=\"high\" width=\"495\" height=\"400\" src=\"https:\/\/volcanofoundation.org\/wp-content\/uploads\/2021\/10\/volcano-foundation-support-local-scientifics-495x400.jpg\" class=\"wp-image-18864 avia-img-lazy-loading-not-18864 attachment-portfolio size-portfolio wp-post-image\" alt=\"\"\/><\/a><div class=\"slide-content\"><header class=\"entry-content-header\" aria-label=\"Slide: NOUS APPUYONS LA FORMATION DES SCIENTIFIQUES DE TERRAIN\"><h3 class=\"slide-entry-title entry-title \" itemprop=\"headline\"><a href=\"https:\/\/volcanofoundation.org\/fr\/nous-appuyons-la-formation-des-scientifiques-de-terrain\/\" title=\"NOUS APPUYONS LA FORMATION DES SCIENTIFIQUES DE TERRAIN\">NOUS APPUYONS LA FORMATION DES SCIENTIFIQUES DE TERRAIN<\/a><\/h3><span class=\"blog-categories minor-meta\"><a href=\"https:\/\/volcanofoundation.org\/fr\/category\/education-fr\/\" rel=\"tag\">&Eacute;DUCATION<\/a>, <a href=\"https:\/\/volcanofoundation.org\/fr\/category\/resilience-fr\/\" rel=\"tag\">R&Eacute;SILIENCE<\/a>, <a href=\"https:\/\/volcanofoundation.org\/fr\/category\/tout\/\" rel=\"tag\">TOUT<\/a>, <a href=\"https:\/\/volcanofoundation.org\/fr\/category\/resilience-fr\/undrr-fr\/\" rel=\"tag\">UNDRR<\/a> <\/span><span class=\"av-vertical-delimiter\"><\/span><\/header><\/div><footer class=\"entry-footer\"><\/footer><span class=\"hidden\">\n\t\t\t\t<span class=\"av-structured-data\" itemprop=\"image\" itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/ImageObject\">\n\t\t\t\t\t\t<span itemprop=\"url\">https:\/\/volcanofoundation.org\/wp-content\/uploads\/2021\/10\/volcano-foundation-support-local-scientifics.jpg<\/span>\n\t\t\t\t\t\t<span itemprop=\"height\">608<\/span>\n\t\t\t\t\t\t<span itemprop=\"width\">1080<\/span>\n\t\t\t\t<\/span>\n\t\t\t\t<span class=\"av-structured-data\" itemprop=\"publisher\" itemtype=\"https:\/\/schema.org\/Organization\" itemscope=\"itemscope\">\n\t\t\t\t\t\t<span itemprop=\"name\">Anne Fornier<\/span>\n\t\t\t\t\t\t<span itemprop=\"logo\" itemscope itemtype=\"https:\/\/schema.org\/ImageObject\">\n\t\t\t\t\t\t\t<span itemprop=\"url\">http:\/\/volcanofoundation.org\/wp-content\/uploads\/2021\/04\/volcano-foundation-1-1.png<\/span>\n\t\t\t\t\t\t<\/span>\n\t\t\t\t<\/span><span class=\"av-structured-data\" itemprop=\"author\" itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/Person\"><span itemprop=\"name\">Anne Fornier<\/span><\/span><span class=\"av-structured-data\" itemprop=\"datePublished\" datetime=\"2018-12-20T11:56:11+01:00\">2021-10-29 16:52:17<\/span><span class=\"av-structured-data\" itemprop=\"dateModified\" itemtype=\"https:\/\/schema.org\/dateModified\">2021-10-29 16:52:17<\/span><span class=\"av-structured-data\" itemprop=\"mainEntityOfPage\" itemtype=\"https:\/\/schema.org\/mainEntityOfPage\"><span itemprop=\"name\">NOUS APPUYONS LA FORMATION DES SCIENTIFIQUES DE TERRAIN<\/span><\/span><\/span><\/article><article class=\"slide-entry flex_column  post-entry post-entry-13671 slide-entry-overview slide-loop-2 slide-parity-even  av_one_third  real-thumbnail posttype-post post-format-standard\" itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/BlogPosting\" itemprop=\"blogPost\"><a href=\"https:\/\/volcanofoundation.org\/fr\/note-technique-nyiragongo\/\" data-rel=\"slide-1\" class=\"slide-image\" title=\"NOTE TECHNIQUE SUR LE VOLCAN NYIRAGONGO &Agrave; GOMA\"><img decoding=\"async\" fetchpriority=\"high\" width=\"495\" height=\"400\" src=\"https:\/\/volcanofoundation.org\/wp-content\/uploads\/2021\/06\/Nyiragongo-goma-GVO-technicalnote-495x400.jpg\" class=\"wp-image-17229 avia-img-lazy-loading-not-17229 attachment-portfolio size-portfolio wp-post-image\" alt=\"\"\/><\/a><div class=\"slide-content\"><header class=\"entry-content-header\" aria-label=\"Slide: NOTE TECHNIQUE SUR LE VOLCAN NYIRAGONGO &Agrave; GOMA\"><h3 class=\"slide-entry-title entry-title \" itemprop=\"headline\"><a href=\"https:\/\/volcanofoundation.org\/fr\/note-technique-nyiragongo\/\" title=\"NOTE TECHNIQUE SUR LE VOLCAN NYIRAGONGO &Agrave; GOMA\">NOTE TECHNIQUE SUR LE VOLCAN NYIRAGONGO &Agrave; GOMA<\/a><\/h3><span class=\"blog-categories minor-meta\"><a href=\"https:\/\/volcanofoundation.org\/fr\/category\/resilience-fr\/\" rel=\"tag\">R&Eacute;SILIENCE<\/a>, <a href=\"https:\/\/volcanofoundation.org\/fr\/category\/tout\/\" rel=\"tag\">TOUT<\/a> <\/span><span class=\"av-vertical-delimiter\"><\/span><\/header><\/div><footer class=\"entry-footer\"><\/footer><span class=\"hidden\">\n\t\t\t\t<span class=\"av-structured-data\" itemprop=\"image\" itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/ImageObject\">\n\t\t\t\t\t\t<span itemprop=\"url\">https:\/\/volcanofoundation.org\/wp-content\/uploads\/2021\/06\/Nyiragongo-goma-GVO-technicalnote.jpg<\/span>\n\t\t\t\t\t\t<span itemprop=\"height\">707<\/span>\n\t\t\t\t\t\t<span itemprop=\"width\">800<\/span>\n\t\t\t\t<\/span>\n\t\t\t\t<span class=\"av-structured-data\" itemprop=\"publisher\" itemtype=\"https:\/\/schema.org\/Organization\" itemscope=\"itemscope\">\n\t\t\t\t\t\t<span itemprop=\"name\">Anne Fornier<\/span>\n\t\t\t\t\t\t<span itemprop=\"logo\" itemscope itemtype=\"https:\/\/schema.org\/ImageObject\">\n\t\t\t\t\t\t\t<span itemprop=\"url\">http:\/\/volcanofoundation.org\/wp-content\/uploads\/2021\/04\/volcano-foundation-1-1.png<\/span>\n\t\t\t\t\t\t<\/span>\n\t\t\t\t<\/span><span class=\"av-structured-data\" itemprop=\"author\" itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/Person\"><span itemprop=\"name\">Anne Fornier<\/span><\/span><span class=\"av-structured-data\" itemprop=\"datePublished\" datetime=\"2018-12-20T11:56:11+01:00\">2021-07-22 17:14:31<\/span><span class=\"av-structured-data\" itemprop=\"dateModified\" itemtype=\"https:\/\/schema.org\/dateModified\">2021-09-28 11:46:57<\/span><span class=\"av-structured-data\" itemprop=\"mainEntityOfPage\" itemtype=\"https:\/\/schema.org\/mainEntityOfPage\"><span itemprop=\"name\">NOTE TECHNIQUE SUR LE VOLCAN NYIRAGONGO &Agrave; GOMA<\/span><\/span><\/span><\/article><article class=\"slide-entry flex_column  post-entry post-entry-12568 slide-entry-overview slide-loop-3 slide-parity-odd  post-entry-last  av_one_third  real-thumbnail posttype-post post-format-standard\" itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/BlogPosting\" itemprop=\"blogPost\"><a href=\"https:\/\/volcanofoundation.org\/fr\/nyiragongo-sud-radio\/\" data-rel=\"slide-1\" class=\"slide-image\" title=\"INTERVIEW SUR LA SITUATION &Agrave; GOMA &laquo;&nbsp;CE QUI S&rsquo;EST PASS&Eacute; &Agrave; NYIRAGONGO&nbsp;&raquo;\"><img decoding=\"async\" fetchpriority=\"high\" width=\"495\" height=\"400\" src=\"https:\/\/volcanofoundation.org\/wp-content\/uploads\/2021\/06\/volcano-foundation-sud-radio-495x400.png\" class=\"wp-image-12569 avia-img-lazy-loading-not-12569 attachment-portfolio size-portfolio wp-post-image\" alt=\"\"\/><\/a><div class=\"slide-content\"><header class=\"entry-content-header\" aria-label=\"Slide: INTERVIEW SUR LA SITUATION &Agrave; GOMA &quot;CE QUI S'EST PASS&Eacute; &Agrave; NYIRAGONGO&quot;\"><h3 class=\"slide-entry-title entry-title \" itemprop=\"headline\"><a href=\"https:\/\/volcanofoundation.org\/fr\/nyiragongo-sud-radio\/\" title=\"INTERVIEW SUR LA SITUATION &Agrave; GOMA &laquo;&nbsp;CE QUI S&rsquo;EST PASS&Eacute; &Agrave; NYIRAGONGO&nbsp;&raquo;\">INTERVIEW SUR LA SITUATION &Agrave; GOMA &laquo;&nbsp;CE QUI S&rsquo;EST PASS&Eacute; &Agrave; NYIRAGONGO&nbsp;&raquo;<\/a><\/h3><span class=\"blog-categories minor-meta\"><a href=\"https:\/\/volcanofoundation.org\/fr\/category\/presse-fr\/\" rel=\"tag\">PRESSE<\/a>, <a href=\"https:\/\/volcanofoundation.org\/fr\/category\/resilience-fr\/\" rel=\"tag\">R&Eacute;SILIENCE<\/a>, <a href=\"https:\/\/volcanofoundation.org\/fr\/category\/tout\/\" rel=\"tag\">TOUT<\/a> <\/span><span class=\"av-vertical-delimiter\"><\/span><\/header><\/div><footer class=\"entry-footer\"><\/footer><span class=\"hidden\">\n\t\t\t\t<span class=\"av-structured-data\" itemprop=\"image\" itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/ImageObject\">\n\t\t\t\t\t\t<span itemprop=\"url\">https:\/\/volcanofoundation.org\/wp-content\/uploads\/2021\/06\/volcano-foundation-sud-radio.png<\/span>\n\t\t\t\t\t\t<span itemprop=\"height\">675<\/span>\n\t\t\t\t\t\t<span itemprop=\"width\">1080<\/span>\n\t\t\t\t<\/span>\n\t\t\t\t<span class=\"av-structured-data\" itemprop=\"publisher\" itemtype=\"https:\/\/schema.org\/Organization\" itemscope=\"itemscope\">\n\t\t\t\t\t\t<span itemprop=\"name\">Anne Fornier<\/span>\n\t\t\t\t\t\t<span itemprop=\"logo\" itemscope itemtype=\"https:\/\/schema.org\/ImageObject\">\n\t\t\t\t\t\t\t<span itemprop=\"url\">http:\/\/volcanofoundation.org\/wp-content\/uploads\/2021\/04\/volcano-foundation-1-1.png<\/span>\n\t\t\t\t\t\t<\/span>\n\t\t\t\t<\/span><span class=\"av-structured-data\" itemprop=\"author\" itemscope=\"itemscope\" itemtype=\"https:\/\/schema.org\/Person\"><span itemprop=\"name\">Anne Fornier<\/span><\/span><span class=\"av-structured-data\" itemprop=\"datePublished\" datetime=\"2018-12-20T11:56:11+01:00\">2021-06-05 10:49:48<\/span><span class=\"av-structured-data\" itemprop=\"dateModified\" itemtype=\"https:\/\/schema.org\/dateModified\">2021-09-28 12:01:22<\/span><span class=\"av-structured-data\" itemprop=\"mainEntityOfPage\" itemtype=\"https:\/\/schema.org\/mainEntityOfPage\"><span itemprop=\"name\">INTERVIEW SUR LA SITUATION &Agrave; GOMA &laquo;&nbsp;<a class=\"glossaryLink\"  aria-describedby=\"tt\"  data-cmtooltip=\"&lt;div class=glossaryItemTitle&gt;CE&lt;\/div&gt;&lt;div class=glossaryItemBody&gt;Abr&eacute;viation de &amp;quot;l&amp;#039;&egrave;re commune&amp;quot; ou &amp;quot;l&amp;#039;&egrave;re actuelle&amp;quot;. CE se r&eacute;f&egrave;re &agrave; l&amp;#039;ann&eacute;e &eacute;coul&eacute;e depuis le d&eacute;but de l&amp;#039;&egrave;re actuelle dans le calendrier julien ou gr&eacute;gorien, par exemple l&amp;#039;ann&eacute;e civile. L&amp;#039;&egrave;re pr&eacute;c&eacute;dente est appel&eacute;e &amp;quot;Avant l&amp;#039;&egrave;re actuelle&amp;quot; ou BCE.&lt;\/div&gt;\"  href=\"https:\/\/volcanofoundation.org\/fr\/glossary\/ce-fr\/\"  data-gt-translate-attributes='[{\"attribute\":\"data-cmtooltip\", \"format\":\"html\"}]'  tabindex='0' role='link'>CE<\/a> QUI S&rsquo;EST PASS&Eacute; &Agrave; NYIRAGONGO&nbsp;&raquo;<\/span><\/span><\/span><\/article><\/div><\/div><\/div><\/div>\n<\/div><\/div><\/div><\/div><\/div>","protected":false},"excerpt":{"rendered":"<p>Les volcans sous-marins apparaissent lorsqu&rsquo;il y a une <a class=\"glossaryLink\" aria-describedby=\"tt\" data-cmtooltip=\"&lt;div class=glossaryItemTitle&gt;FISSURE&lt;\/div&gt;&lt;div class=glossaryItemBody&gt;En g&eacute;ologie, une fissure est une fracture ou une fissure dans la roche le long de laquelle il y a une s&eacute;paration distincte ; les fissures sont souvent remplies de mat&eacute;riaux min&eacute;raux. Sur les volcans, une fissure est une fracture allong&eacute;e ou une fissure &agrave; la surface d&amp;#039;o&ugrave; la lave &eacute;clate. Les &eacute;ruptions de fisuration diminuent g&eacute;n&eacute;ralement jusqu&amp;#039;&agrave; un &eacute;vent central apr&egrave;s une p&eacute;riode d&amp;#039;heures ou de jours. &Agrave; l&amp;#039;occasion, la lave se renverse dans le sol en se d&eacute;versant dans une fissure ou une fissure &eacute;ruptive ouverte, un processus appel&eacute; drainage ; parfois, la lave se d&eacute;verse dans la m&ecirc;me fissure d&amp;#039;o&ugrave; elle a &eacute;clat&eacute;.&lt;\/div&gt;\" href=\"https:\/\/volcanofoundation.org\/fr\/glossary\/fissure-fr\/\" data-gt-translate-attributes='[{\"attribute\":\"data-cmtooltip\", \"format\":\"html\"}]' tabindex=\"0\" role=\"link\">fissure<\/a> dans le fond de l&rsquo;oc&eacute;an par laquelle le <a class=\"glossaryLink\" aria-describedby=\"tt\" data-cmtooltip=\"&lt;div class=glossaryItemTitle&gt;MAGMA&lt;\/div&gt;&lt;div class=glossaryItemBody&gt;Roche fondue sous la surface de la Terre.&lt;\/div&gt;\" href=\"https:\/\/volcanofoundation.org\/fr\/glossary\/magma-fr\/\" data-gt-translate-attributes='[{\"attribute\":\"data-cmtooltip\", \"format\":\"html\"}]' tabindex=\"0\" role=\"link\">magma<\/a> peut entrer en &eacute;ruption.<\/p>\n","protected":false},"author":8,"featured_media":6112,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[331,330],"tags":[],"doc_authors":[],"doc_languages":[],"class_list":["post-14836","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-biodiversite-et-culture","category-tout"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/volcanofoundation.org\/fr\/wp-json\/wp\/v2\/posts\/14836","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/volcanofoundation.org\/fr\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/volcanofoundation.org\/fr\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/volcanofoundation.org\/fr\/wp-json\/wp\/v2\/users\/8"}],"replies":[{"embeddable":true,"href":"https:\/\/volcanofoundation.org\/fr\/wp-json\/wp\/v2\/comments?post=14836"}],"version-history":[{"count":0,"href":"https:\/\/volcanofoundation.org\/fr\/wp-json\/wp\/v2\/posts\/14836\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/volcanofoundation.org\/fr\/wp-json\/wp\/v2\/media\/6112"}],"wp:attachment":[{"href":"https:\/\/volcanofoundation.org\/fr\/wp-json\/wp\/v2\/media?parent=14836"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/volcanofoundation.org\/fr\/wp-json\/wp\/v2\/categories?post=14836"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/volcanofoundation.org\/fr\/wp-json\/wp\/v2\/tags?post=14836"},{"taxonomy":"doc_authors","embeddable":true,"href":"https:\/\/volcanofoundation.org\/fr\/wp-json\/wp\/v2\/doc_authors?post=14836"},{"taxonomy":"doc_languages","embeddable":true,"href":"https:\/\/volcanofoundation.org\/fr\/wp-json\/wp\/v2\/doc_languages?post=14836"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}