{"id":399,"date":"2025-04-11T15:03:13","date_gmt":"2025-04-11T13:03:13","guid":{"rendered":"https:\/\/www.meteor-oi.re\/?page_id=399"},"modified":"2025-04-13T21:33:40","modified_gmt":"2025-04-13T19:33:40","slug":"le-risque-sismique-a-la-reunion","status":"publish","type":"page","link":"https:\/\/www.meteor-oi.re\/index.php\/les-risques-naturels-a-la-reunion\/le-risque-sismique-a-la-reunion\/","title":{"rendered":"Le risque sismique \u00e0 La R\u00e9union"},"content":{"rendered":"\n

Pour l\u2019essentiel, ce risque demeure faible \u00e0 mod\u00e9r\u00e9 selon les r\u00e9gions. On peut d\u00e9finir deux principales origines aux tr\u00e9pidations de la cro\u00fbte terrestre par chez nous. La R\u00e9union \u00e9tant \u00e9difi\u00e9e sur un volcan bouclier, il peut en r\u00e9sulter des s\u00e9ismes d\u2019enfoncement de faible intensit\u00e9 parfois plusieurs fois par an et principalement au niveau du massif de la Roche Ecrite. Ceux-ci sont, le plus souvent, \u00e0 peine perceptibles et ne repr\u00e9sente pas de danger notable pour les populations. De temps en temps, un s\u00e9isme d\u2019intensit\u00e9 mod\u00e9r\u00e9e peut survenir et d\u00e9grader certains b\u00e2timents mais ces \u00e9v\u00e9nements restent rares.<\/p>\n\n\n\n

L\u2019autre source sismique provient de la Fournaise dont l\u2019activit\u00e9 souterraine constitu\u00e9e d\u2019effondrements et de d\u00e9placements de magma peut occasionner de petits tremblements de terre. Lorsqu\u2019ils surviennent en essaim tr\u00e8s rapproch\u00e9s sur une courte p\u00e9riode, on parle alors de crise sismique, signe avant-coureur d\u2019une \u00e9ruption<\/a> \u00e0 plus ou moins br\u00e8ve \u00e9ch\u00e9ance. L\u00e0 encore, il est rare que ces s\u00e9ismes soient perceptibles pour les riverains, m\u00eame si un effondrement plus cons\u00e9quent ou une mise en pression magmatique plus franche peuvent occasionner des s\u00e9ismes mod\u00e9r\u00e9s.<\/p>\n\n\n\n

Quels r\u00f4les pour M\u00e9t\u00e9oR-OI ?<\/h2>\n\n\n\n

Certains membres suivent le moindre soubresaut du volcan \u00e0 l\u2019aff\u00fbt d\u2019un signe de reprise d\u2019activit\u00e9. <\/p>\n","protected":false},"excerpt":{"rendered":"

Pour l\u2019essentiel, ce risque demeure faible \u00e0 mod\u00e9r\u00e9 selon les r\u00e9gions. On peut d\u00e9finir deux principales origines aux tr\u00e9pidations de la cro\u00fbte terrestre par chez nous. La R\u00e9union \u00e9tant \u00e9difi\u00e9e sur un volcan bouclier, il peut en r\u00e9sulter des s\u00e9ismes d\u2019enfoncement de faible intensit\u00e9 parfois plusieurs fois par an et principalement au niveau du massif…
Lire la suite<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"parent":394,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-399","page","type-page","status-publish","hentry"],"yoast_head":"\nLe risque sismique \u00e0 La R\u00e9union<\/title>\n<meta name=\"description\" content=\"Le risque sismique \u00e0 La R\u00e9union : origines volcaniques ou tectoniques, intensit\u00e9s faibles \u00e0 mod\u00e9r\u00e9es, surveillance et rare danger imm\u00e9diat.\" \/>\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.meteor-oi.re\/index.php\/les-risques-naturels-a-la-reunion\/le-risque-sismique-a-la-reunion\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Le risque sismique \u00e0 La R\u00e9union\" 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