{"id":6693,"date":"2022-09-02T17:00:00","date_gmt":"2022-09-02T17:00:00","guid":{"rendered":"https:\/\/www.africa-press.net\/djibouti\/?p=6693"},"modified":"2022-09-02T16:47:08","modified_gmt":"2022-09-02T16:47:08","slug":"leruption-du-volcan-nyiragongo-ne-pouvait-etre-predite","status":"publish","type":"post","link":"https:\/\/www.africa-press.net\/djibouti\/toutes-les-actualites\/leruption-du-volcan-nyiragongo-ne-pouvait-etre-predite","title":{"rendered":"L\u2019\u00e9ruption du volcan Nyiragongo ne pouvait \u00eatre pr\u00e9dite"},"content":{"rendered":"

Africa-Press – Djibouti. <\/strong><\/span>L\u2019\u00e9ruption du volcan Nyiragongo, qui a d\u00e9truit une partie de la ville de Goma dans l\u2019est de la R\u00e9publique d\u00e9mocratique du Congo (RDC) en mai 2021 et contraint des milliers d\u2019habitants de fuir, ne pouvait \u00eatre pr\u00e9dite, d\u2019apr\u00e8s une \u00e9tude publi\u00e9e mercredi dans la revue scientifique Nature. Selon les auteurs, parmi lesquels figurent des chercheurs du Mus\u00e9e de l\u2019Afrique centrale de Tervuren, les \u00e9ruptions volcaniques sont g\u00e9n\u00e9ralement pr\u00e9c\u00e9d\u00e9es de signaux pr\u00e9curseurs.<\/b><\/p>\n

\u00ab Pour alerter de l\u2019imminence d\u2019une \u00e9ruption, les observatoires volcanologiques surveillent g\u00e9n\u00e9ralement la sismicit\u00e9, les d\u00e9formations du sol et les \u00e9missions gazeuses traduisant le d\u00e9placement de magma dans la cro\u00fbte terrestre \u00bb, explique Delphine Smittarello, chercheuse au Centre europ\u00e9en de G\u00e9odynamique et de S\u00e9ismologie au Luxembourg.<\/p>\n

Or \u00ab l\u2019\u00e9ruption du volcan Nyiragongo n\u2019\u00e9tait pr\u00e9c\u00e9d\u00e9e d\u2019aucun de ces signaux habituels, et ce malgr\u00e9 une surveillance continue par des r\u00e9seaux d\u2019instruments au sol et de capteurs satellitaires. A posteriori, les enregistrements sismiques ont montr\u00e9 que les premiers \u00e9v\u00e9nements marquant une activit\u00e9 inhabituelle ont d\u00e9but\u00e9 moins de 40 minutes avant les premi\u00e8res coul\u00e9es de lave \u00bb, ajoute la chercheuse.<\/p>\n

\u00ab Ce comportement du volcan fut d\u2019autant plus inattendu que les deux seules \u00e9ruptions historiques connues, en 1977 et 2002, avaient \u00e9t\u00e9 pr\u00e9c\u00e9d\u00e9es par de forts s\u00e9ismes ressentis quelques semaines \u00e0 quelques jours au pr\u00e9alable \u00bb, pr\u00e9cise Adalbert Muhindo, directeur de l\u2019Observatoire volcanologique de Goma.<\/p>\n

L\u2019\u00e9tude montre \u00e9galement qu\u2019un imposant volume de magma (243 millions de m\u00e8tres cubes) s\u2019est d\u00e9plac\u00e9 sous la ville de Goma, ce qui repr\u00e9sente de nouvelles menaces li\u00e9es au Nyiragongo, d\u2019apr\u00e8s Beno\u00eet Smets, chercheur au Mus\u00e9e royal de l\u2019Afrique centrale.<\/p>\n

\u00ab D\u00e8s lors que du magma circule \u00e0 si faible profondeur, il existe un risque d\u2019effusion de lave en pleine ville, d\u2019\u00e9ruption phr\u00e9atomagmatique (si le magma entre en contact avec l\u2019eau froide du lac Kivu) ou encore d\u2019\u00e9ruption limnique du lac Kivu, craint pour l\u2019\u00e9norme quantit\u00e9 de CO2 et de m\u00e9thane dissous dans ses eaux profondes. Ces \u00e9v\u00e9nements sont potentiellement beaucoup plus dangereux que les trois \u00e9ruptions connues jusqu\u2019ici \u00bb, d\u00e9taille-t-il.<\/p>\n

Le 22 mai 2021, l\u2019\u00e9ruption du volcan Nyiragongo a surpris les habitants de la ville de Goma, dont une partie a \u00e9t\u00e9 d\u00e9truite par les coul\u00e9es de lave. Si l\u2019\u00e9ruption n\u2019a dur\u00e9 que quelques heures, la confusion et le manque d\u2019anticipation ont compliqu\u00e9 la gestion de la crise.<\/p>\n

Pour plus d’informations et d’analyses sur la Djibouti<\/a>, suivez Africa-Press<\/a><\/strong><\/p>\n","protected":false},"excerpt":{"rendered":"

Africa-Press – Djibouti. L\u2019\u00e9ruption du volcan Nyiragongo, qui a d\u00e9truit une partie de la ville de Goma dans l\u2019est de la R\u00e9publique d\u00e9mocratique du Congo (RDC) en mai 2021 et contraint des milliers d\u2019habitants de fuir, ne pouvait \u00eatre pr\u00e9dite, d\u2019apr\u00e8s une \u00e9tude publi\u00e9e mercredi dans la revue scientifique Nature. Selon les auteurs, parmi lesquels […]<\/p>\n","protected":false},"author":82,"featured_media":6692,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[22,11,10],"tags":[36,49,50],"class_list":["post-6693","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-divers","category-homepage-french","category-toutes-les-actualites","tag-africa-press","tag-africa-press-djibouti","tag-djibouti"],"yoast_head":"\nL\u2019\u00e9ruption du volcan Nyiragongo ne pouvait \u00eatre pr\u00e9dite - Djibouti<\/title>\n<meta name=\"description\" content=\"L\u2019\u00e9ruption du volcan Nyiragongo, qui a d\u00e9truit une partie de la ville de Goma dans l\u2019est de la R\u00e9publique d\u00e9mocratiqu ...\" \/>\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.africa-press.net\/djibouti\/toutes-les-actualites\/leruption-du-volcan-nyiragongo-ne-pouvait-etre-predite\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"L\u2019\u00e9ruption du volcan Nyiragongo ne pouvait \u00eatre pr\u00e9dite\" \/>\n<meta property=\"og:description\" content=\"L\u2019\u00e9ruption du volcan Nyiragongo, qui a d\u00e9truit une partie de la ville de Goma dans l\u2019est de la R\u00e9publique d\u00e9mocratiqu ...\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.africa-press.net\/djibouti\/toutes-les-actualites\/leruption-du-volcan-nyiragongo-ne-pouvait-etre-predite\" \/>\n<meta property=\"og:site_name\" content=\"Djibouti\" \/>\n<meta property=\"article:published_time\" content=\"2022-09-02T17:00:00+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/static.africa-press.net\/djibouti\/sites\/52\/2022\/09\/postQueueImg_2.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"720\" \/>\n\t<meta property=\"og:image:height\" content=\"469\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"cfeditorfr\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"\u00c9crit par\" \/>\n\t<meta name=\"twitter:data1\" content=\"cfeditorfr\" \/>\n\t<meta name=\"twitter:label2\" content=\"Dur\u00e9e de lecture estim\u00e9e\" \/>\n\t<meta name=\"twitter:data2\" content=\"2 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/www.africa-press.net\/djibouti\/toutes-les-actualites\/leruption-du-volcan-nyiragongo-ne-pouvait-etre-predite#article\",\"isPartOf\":{\"@id\":\"https:\/\/www.africa-press.net\/djibouti\/toutes-les-actualites\/leruption-du-volcan-nyiragongo-ne-pouvait-etre-predite\"},\"author\":{\"name\":\"cfeditorfr\",\"@id\":\"https:\/\/www.africa-press.net\/djibouti\/#\/schema\/person\/2b1cf3cd81a31e3cd26889ca66d677f1\"},\"headline\":\"L\u2019\u00e9ruption du volcan Nyiragongo ne pouvait \u00eatre pr\u00e9dite\",\"datePublished\":\"2022-09-02T17:00:00+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/www.africa-press.net\/djibouti\/toutes-les-actualites\/leruption-du-volcan-nyiragongo-ne-pouvait-etre-predite\"},\"wordCount\":465,\"commentCount\":0,\"image\":{\"@id\":\"https:\/\/www.africa-press.net\/djibouti\/toutes-les-actualites\/leruption-du-volcan-nyiragongo-ne-pouvait-etre-predite#primaryimage\"},\"thumbnailUrl\":\"https:\/\/static.africa-press.net\/djibouti\/sites\/52\/2022\/09\/postQueueImg_2.jpg\",\"keywords\":[\"Africa Press\",\"Africa Press-Djibouti\",\"Djibouti\"],\"articleSection\":[\"Divers\",\"homepage-french\",\"Toutes les actualit\u00e9s\"],\"inLanguage\":\"fr-FR\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\/\/www.africa-press.net\/djibouti\/toutes-les-actualites\/leruption-du-volcan-nyiragongo-ne-pouvait-etre-predite#respond\"]}]},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.africa-press.net\/djibouti\/toutes-les-actualites\/leruption-du-volcan-nyiragongo-ne-pouvait-etre-predite\",\"url\":\"https:\/\/www.africa-press.net\/djibouti\/toutes-les-actualites\/leruption-du-volcan-nyiragongo-ne-pouvait-etre-predite\",\"name\":\"L\u2019\u00e9ruption du volcan Nyiragongo ne pouvait \u00eatre pr\u00e9dite - 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