{"id":448992,"date":"2026-09-24T19:18:08","date_gmt":"2026-09-24T19:18:08","guid":{"rendered":"http:\/\/6ab559940275c92ee65bbd58"},"modified":"2026-09-24T19:18:08","modified_gmt":"2026-09-24T19:18:08","slug":"una-lucha-gravitacional-al-interior-de-la-tierra-esta-cambiando-la-duracion-de-los-dias","status":"publish","type":"post","link":"https:\/\/sarmiento24h.com\/?p=448992","title":{"rendered":"Una \u00ablucha gravitacional\u00bb al interior de la Tierra est\u00e1 cambiando la duraci\u00f3n de los d\u00edas"},"content":{"rendered":"<p>Los d\u00edas de la Tierra no duran exactamente lo mismo. Los cient\u00edficos llevan d\u00e9cadas registrando peque\u00f1as variaciones en su duraci\u00f3n, a veces de apenas unos milisegundos. Son cambios diminutos y mayoritariamente imperceptibles, pero reciben bastante atenci\u00f3n porque est\u00e1n directamente relacionados con la velocidad de rotaci\u00f3n del planeta. El estudio de estas variaciones puede revelar lo que ocurre tanto en la superficie de la Tierra como en sus regiones m\u00e1s profundas.<\/p>\n<p>Los cambios en la velocidad de rotaci\u00f3n del planeta y, por tanto, en la duraci\u00f3n de los d\u00edas, pueden tener varias causas. La atm\u00f3sfera y los oc\u00e9anos pueden acelerar o frenar ligeramente la rotaci\u00f3n terrestre; los grandes terremotos pueden redistribuir parte de la masa del planeta y <a href=\"https:\/\/es.wired.com\/articulos\/el-cambio-climatico-esta-acelerando-la-rotacion-de-la-tierra\">hasta el derretimiento de hielo continental puede modificarla<\/a> al desplazar enormes cantidades de agua hacia los oc\u00e9anos.<\/p>\n<hr>\n<div class=\"ContentCardEmbedWrapper-hkvhYu kMYDit content-card-embed content-card-embed--stacked\" data-testid=\"ContentCardEmbedWrapper\" readability=\"22.75\">\n<div class=\"ContentCardEmbedImage-bqahne fjmzkP content-card-embed__image\" data-testid=\"ContentCardEmbedImage\"><span class=\"SpanWrapper-kFnjvc eKnjjD responsive-asset\"><picture class=\"ResponsiveImagePicture-jKunQM gjCCFj responsive-image\"><img decoding=\"async\" alt=\"article image\" loading=\"lazy\" class=\"ResponsiveImageContainer-dkeESL cQPiWi responsive-image__image\" srcset=\"https:\/\/media.es.wired.com\/photos\/6a724aef5b5f87eaee923287\/master\/w_120,c_limit\/2209587191 120w, https:\/\/media.es.wired.com\/photos\/6a724aef5b5f87eaee923287\/master\/w_240,c_limit\/2209587191 240w, https:\/\/media.es.wired.com\/photos\/6a724aef5b5f87eaee923287\/master\/w_320,c_limit\/2209587191 320w, https:\/\/media.es.wired.com\/photos\/6a724aef5b5f87eaee923287\/master\/w_640,c_limit\/2209587191 640w, https:\/\/media.es.wired.com\/photos\/6a724aef5b5f87eaee923287\/master\/w_768,c_limit\/2209587191 768w\" sizes=\"100vw\" src=\"https:\/\/media.es.wired.com\/photos\/6a724aef5b5f87eaee923287\/master\/w_775%2Cc_limit\/2209587191\"><\/picture><\/span><\/div>\n<div class=\"ContentCardEmbedInfo-buyHWH gWLOee\" readability=\"23.833333333333\">\n<div class=\"BaseText-fEwdHD ContentCardEmbedHed-kDKGDs iUENtL dlHXUJ content-card-embed__hed\" data-testid=\"ContentCardEmbedHed\"><a class=\"BaseLink-haTOKm ContentCardEmbedHedLink-iBZsco ILkR hhUFQU content-card-embed__hed-link link\" href=\"https:\/\/es.wired.com\/articulos\/el-increible-plan-para-que-la-tierra-sobreviva-tras-la-muerte-del-sol\" data-testid=\"ContentCardEmbedHedLink\">El incre\u00edble plan para que la Tierra sobreviva tras la muerte del Sol<\/a><\/div>\n<p>Abandonar la Tierra quiz\u00e1 no sea la \u00fanica forma de escapar de la muerte del Sol. Un estudio imagina c\u00f3mo una civilizaci\u00f3n futura podr\u00eda vivir durante miles de billones de a\u00f1os.<\/p>\n<\/div>\n<\/div>\n<hr>\n<p>En escalas de varias d\u00e9cadas, parte de estas variaciones parece originarse mucho m\u00e1s abajo, en el interior de la Tierra. <a href=\"https:\/\/es.wired.com\/articulos\/dos-estructuras-titanicas-ocultas-en-las-entranas-de-la-tierra-han-alterado-el-campo-magnetico-por-millones-de-anos\">Bajo el manto rocoso<\/a> se encuentra el n\u00facleo externo, una gigantesca capa de metal l\u00edquido que est\u00e1 en constante movimiento. Cuando esos flujos cambian, tambi\u00e9n pueden alterar ligeramente la velocidad con la que gira el resto del planeta.<\/p>\n<p>El problema es que todav\u00eda no est\u00e1 del todo claro c\u00f3mo se transmiten esas fuerzas de una regi\u00f3n a otra. La fricci\u00f3n directa entre el n\u00facleo y el manto parece ser demasiado d\u00e9bil, as\u00ed que identificar los \u201cengranes\u201d capaces de conectarlos ha sido uno de los desaf\u00edos de la geof\u00edsica del interior terrestre.<\/p>\n<p>Un nuevo estudio publicado esta semana en <a href=\"https:\/\/www.nature.com\/articles\/s41586-026-10999-2\"><em>Nature<\/em><\/a> cree haber identificado uno de esos \u201cengranes\u201d ocultos. Su propuesta es que los cambios en la rotaci\u00f3n terrestre surgen de un tira y afloja entre fuerzas que act\u00faan en las profundidades del planeta. La gravedad vinculada al n\u00facleo interno empujar\u00eda la rotaci\u00f3n en una direcci\u00f3n, mientras otras interacciones entre el n\u00facleo y el manto se opondr\u00edan a ella. El resultado de esa competencia, acumulado durante d\u00e9cadas, ser\u00edan peque\u00f1as aceleraciones y desaceleraciones del planeta.<\/p>\n<p>La idea parte de que el n\u00facleo interno no gira exactamente al mismo ritmo que el resto del planeta. Esa diferencia puede hacer que quede ligeramente desalineado respecto a ciertas irregularidades de masa en el manto. Cuando eso ocurre, la gravedad intenta devolverlo a una posici\u00f3n de equilibrio y genera un efecto gravitacional capaz de influir, aunque sea de forma min\u00fascula, en la rotaci\u00f3n del <a href=\"https:\/\/es.wired.com\/articulos\/muestra-kilometrica-del-manto-de-la-tierra\">manto<\/a> y de la superficie terrestre.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Los d\u00edas de la Tierra no duran&#46;&#46;&#46;<\/p>\n","protected":false},"author":1,"featured_media":448993,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_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":[46],"tags":[],"class_list":["post-448992","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-tecnologia"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.5 - 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