{"id":4456,"date":"2019-02-16T00:18:30","date_gmt":"2019-02-16T00:18:30","guid":{"rendered":"https:\/\/www.zoom--in.it\/?p=4456"},"modified":"2019-02-18T17:37:59","modified_gmt":"2019-02-18T17:37:59","slug":"il-polo-nord-magnetico-continua-a-spostarsi","status":"publish","type":"post","link":"https:\/\/www.zoom--in.it\/index.php\/2019\/02\/16\/il-polo-nord-magnetico-continua-a-spostarsi\/","title":{"rendered":"Il Polo Nord Magnetico continua a spostarsi"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-post\" data-elementor-id=\"4456\" class=\"elementor elementor-4456 elementor-bc-flex-widget\">\n\t\t\t\t\t\t<div class=\"elementor-inner\">\n\t\t\t\t<div class=\"elementor-section-wrap\">\n\t\t\t\t\t\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-bb9e528 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"bb9e528\" data-element_type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t\t\t<div class=\"elementor-row\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-b87e138\" data-id=\"b87e138\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-column-wrap elementor-element-populated\">\n\t\t\t\t\t\t\t<div class=\"elementor-widget-wrap\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-a3eb434 elementor-widget elementor-widget-heading\" data-id=\"a3eb434\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Il polo Nord magnetico continua a spostarsi. \nMa perch\u00e9?<\/h2>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-23bde63 elementor-widget elementor-widget-text-editor\" data-id=\"23bde63\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t<div class=\"elementor-text-editor elementor-clearfix\">\n\t\t\t\t<p><em><span style=\"font-weight: 400;\">Dal Canada alla Siberia, si muove molto rapidamente. Gli esperti non sanno ancora perch\u00e9; debbono tuttavia aggiornare nuovamente il <\/span><b>World Magnetic Model<\/b><span style=\"font-weight: 400;\">, utilizzato per gestire i modelli di navigazione.<\/span><\/em><\/p>\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-8499bb5 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"8499bb5\" data-element_type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t\t\t<div class=\"elementor-row\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-9d2ba24\" data-id=\"9d2ba24\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-column-wrap elementor-element-populated\">\n\t\t\t\t\t\t\t<div class=\"elementor-widget-wrap\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-d2d4859 elementor-widget elementor-widget-text-editor\" data-id=\"d2d4859\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t<div class=\"elementor-text-editor elementor-clearfix\">\n\t\t\t\t<p><span style=\"font-weight: 400;\">Sta succedendo davvero qualcosa di strano: il\u00a0<\/span><b>polo Nord magnetico<\/b><span style=\"font-weight: 400;\">\u00a0della Terra si sta allontanando dal\u00a0<\/span><b>Canada<\/b><span style=\"font-weight: 400;\">, in rapidissima migrazione verso la\u00a0<\/span><b>Siberia<\/b><span style=\"font-weight: 400;\">. Ma i geologi non sanno ancora il perch\u00e9: tuttavia ipotizzano che questo spostamento sarebbe legato molto probabilmente alle anomalie del flusso di\u00a0<\/span><b>ferro fuso<\/b><span style=\"font-weight: 400;\">\u00a0che si trova all\u2019interno del nucleo della Terra.<\/span><\/p><p><span style=\"font-weight: 400;\">Il\u00a0<\/span><b>campo magnetico terrestre<\/b><span style=\"font-weight: 400;\">\u00a0\u00e8 un fenomeno fisico notevolmente importante per la vita sulla Terra: si estende per decine di migliaia di chilometri nello\u00a0<\/span><a href=\"https:\/\/www.wired.it\/scienza\/spazio\/\"><b>Spazio<\/b><\/a><span style=\"font-weight: 400;\">, formando la cosiddetta\u00a0<\/span><b>magnetosfera<\/b><span style=\"font-weight: 400;\">, la cui presenza ci protegge dai raggi cosmici e dalle radiazioni provenienti dal vento solare. Viene prodotto dai moti che avvengono all\u2019interno del\u00a0<\/span><b>nucleo\u00a0<\/b><span style=\"font-weight: 400;\">della Terra, composto da ferro allo stato liquido\u00a0in movimento. Questo crea correnti elettriche che, a loro volta, generano il\u00a0<\/span><b>campo magnetico<\/b><span style=\"font-weight: 400;\">.<\/span><\/p>\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-6a2d426 elementor-widget elementor-widget-image\" data-id=\"6a2d426\" data-element_type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t<div class=\"elementor-image\">\n\t\t\t\t\t\t\t\t\t\t\t\t<img width=\"640\" height=\"408\" src=\"https:\/\/i0.wp.com\/www.zoom--in.it\/wp-content\/uploads\/2019\/02\/nucleo-della-terra.jpg?fit=640%2C408&amp;ssl=1\" class=\"attachment-large size-large\" alt=\"\" loading=\"lazy\" data-attachment-id=\"4461\" data-permalink=\"https:\/\/www.zoom--in.it\/index.php\/2019\/02\/16\/il-polo-nord-magnetico-continua-a-spostarsi\/nucleo-della-terra\/\" data-orig-file=\"https:\/\/i0.wp.com\/www.zoom--in.it\/wp-content\/uploads\/2019\/02\/nucleo-della-terra.jpg?fit=2000%2C1273&amp;ssl=1\" data-orig-size=\"2000,1273\" 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;}\" data-image-title=\"nucleo-della-terra\" data-image-description=\"\" data-image-caption=\"\" data-medium-file=\"https:\/\/i0.wp.com\/www.zoom--in.it\/wp-content\/uploads\/2019\/02\/nucleo-della-terra.jpg?fit=300%2C191&amp;ssl=1\" data-large-file=\"https:\/\/i0.wp.com\/www.zoom--in.it\/wp-content\/uploads\/2019\/02\/nucleo-della-terra.jpg?fit=640%2C408&amp;ssl=1\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-cf15783 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"cf15783\" data-element_type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t\t\t<div class=\"elementor-row\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-1c86237\" data-id=\"1c86237\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-column-wrap elementor-element-populated\">\n\t\t\t\t\t\t\t<div class=\"elementor-widget-wrap\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-6c5b457 elementor-widget elementor-widget-text-editor\" data-id=\"6c5b457\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t<div class=\"elementor-text-editor elementor-clearfix\">\n\t\t\t\t<p><span style=\"font-weight: 400;\">Il\u00a0<\/span><a href=\"https:\/\/www.wired.it\/scienza\/lab\/2018\/09\/28\/giappone-campo-magnetico-potente\/\"><b>campo magnetico<\/b><\/a><span style=\"font-weight: 400;\">\u00a0pu\u00f2 mutare nel tempo, ma negli ultimi anni sembra che sia davvero instabile. Gli operatori esperti sono dunque stati costretti a compiere una mossa inconsueta: il <\/span><b>30 gennaio prossimo<\/b><span style=\"font-weight: 400;\">, infatti, hanno aggiornato i dati del\u00a0<\/span><a href=\"https:\/\/en.wikipedia.org\/wiki\/World_Magnetic_Model\"><b>World Magnetic Model<\/b><\/a><span style=\"font-weight: 400;\">, il modello che descrive il campo magnetico del pianeta. I dati di tale modello fungono da riferimento per tutti i moderni sistemi di\u00a0<\/span><b>navigazione<\/b><span style=\"font-weight: 400;\">\u00a0e\u00a0<\/span><b>geolocalizzazione<\/b><span style=\"font-weight: 400;\">, dai sistemi a bordo delle navi a\u00a0<\/span><b>Google Maps<\/b><span style=\"font-weight: 400;\">\u00a0sugli smartphone.<\/span><\/p><p><span style=\"font-weight: 400;\">La versione pi\u00f9 recente del modello risale al\u00a0<\/span><b>2015<\/b><span style=\"font-weight: 400;\">\u00a0e sarebbe dovuta durare, secondo le previsioni, fino al\u00a0<\/span><b>2020<\/b><span style=\"font-weight: 400;\">. Ma\u00a0<\/span><i><span style=\"font-weight: 400;\">\u201cl\u2019errore aumenta continuamente\u201d<\/span><\/i><span style=\"font-weight: 400;\">, ha\u00a0<\/span><a href=\"https:\/\/www.nature.com\/articles\/d41586-019-00007-1\"><b>spiegato<\/b><\/a><span style=\"font-weight: 400;\">\u00a0a\u00a0<\/span><b><i>Nature<\/i><\/b><span style=\"font-weight: 400;\">\u00a0<\/span><b>Arnaud Chulliat<\/b><span style=\"font-weight: 400;\">, geomagnetista all\u2019Universit\u00e0 del Colorado Boulder e al Noaa.<\/span><\/p><p><span style=\"font-weight: 400;\">Non \u00e8 la prima volta, tuttavia, che si verificano anomalie negli ultimi anni: nel\u00a0<\/span><b>2016<\/b><span style=\"font-weight: 400;\">, parte del campo magnetico ha registrato un\u00a0<\/span><b>picco temporaneo di intensit\u00e0 <\/b><span style=\"font-weight: 400;\">(monitorato dal satellite\u00a0<\/span><a href=\"https:\/\/www.esa.int\/Our_Activities\/Observing_the_Earth\/Swarm\"><b>Swarm<\/b><\/a><span style=\"font-weight: 400;\">\u00a0dell\u2019Esa &#8211; European Space Agency) nelle profondit\u00e0 del nord e sud America, ma pure dell\u2019Oceano Pacifico.\u00a0Concludendo, l\u2019impulso geomagnetico del 2016 \u00e8 arrivato subito dopo l\u2019aggiornamento del 2015 al\u00a0<\/span><b>World Magnetic Model<\/b><span style=\"font-weight: 400;\">. Ci\u00f2 significa che il campo magnetico ha oscillato subito dopo l\u2019ultimo aggiornamento, facendo diventare i suoi dati superati, sebbene fossero recenti.<\/span><\/p><p><span style=\"font-weight: 400;\">Va infine detto che il movimento del\u00a0<\/span><b>polo nord magnetico<\/b><span style=\"font-weight: 400;\">\u00a0si modifica in modi imprevedibili da quando \u00e8 stato misurato per la prima volta nel\u00a0<\/span><b>1831<\/b><span style=\"font-weight: 400;\">\u00a0da\u00a0<\/span><a href=\"https:\/\/it.wikipedia.org\/wiki\/James_Clark_Ross\"><b>James Clark Ross<\/b><\/a><span style=\"font-weight: 400;\">, registrando una velocit\u00e0 di spostamento di circa 15 chilometri all\u2019anno negli anni novanta, sino a circa\u00a0<\/span><b>55 chilometri all\u2019anno<\/b><span style=\"font-weight: 400;\">\u00a0di oggi. Nel 2018, infatti, il polo magnetico ha superato la<\/span><b>\u00a0linea internazionale del cambio di data\u00a0<\/b><span style=\"font-weight: 400;\">e, attualmente, sta facendo rotta per la Siberia.<\/span><\/p><p><span style=\"font-weight: 400;\">Ma perch\u00e9 il\u00a0<\/span><a href=\"https:\/\/www.wired.it\/scienza\/medicina\/2016\/06\/24\/sesto-senso-campo-magnetico\/\"><b>campo magnetico<\/b><\/a><span style=\"font-weight: 400;\">\u00a0sta cambiando cos\u00ec rapidamente? Secondo gli esperti non c\u2019\u00e8 nulla di catastrofico alla base della spiegazione: gli impulsi geomagnetici, come quelli avvenuti nel 2016, potrebbero essere ricondotti a\u00a0<\/span><b>onde \u201cidromagnetiche\u201d<\/b><span style=\"font-weight: 400;\">\u00a0prodotte nel profondo del nucleo. E il movimento veloce del polo nord magnetico potrebbe essere collegato a un getto ad alta velocit\u00e0 di<\/span><b>\u00a0ferro liquido<\/b><span style=\"font-weight: 400;\">\u00a0nelle profondit\u00e0 del pianeta, in corrispondenza del Canada.<\/span><i><span style=\"font-weight: 400;\">\u00a0\u201cIl getto sembra indebolire il campo magnetico sotto il Canada\u201d<\/span><\/i><span style=\"font-weight: 400;\">, ha spiegato\u00a0<\/span><b>Phil Livermore,<\/b><span style=\"font-weight: 400;\">\u00a0geomagnetista dell\u2019Universit\u00e0 di Leeds (Regno Unito).\u00a0<\/span><i><span style=\"font-weight: 400;\">\u201cLa posizione del polo nord magnetico sembra essere governata da due grandi campi magnetici, uno sotto il Canada e uno sotto la Siberia\u201d<\/span><\/i><span style=\"font-weight: 400;\">, ha concluso Livermore.\u00a0<\/span><i><span style=\"font-weight: 400;\">\u201cE la Siberia oggi sta vincendo questa competizione\u201d.<\/span><\/i><\/p>\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p>Il polo Nord magnetico continua a spostarsi. Ma perch\u00e9? Dal Canada alla Siberia, si muove<\/p>\n","protected":false},"author":1,"featured_media":4458,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"spay_email":""},"categories":[4],"tags":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v19.4 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Il Polo Nord Magnetico continua a spostarsi - ZoomIN Magazine<\/title>\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.zoom--in.it\/index.php\/2019\/02\/16\/il-polo-nord-magnetico-continua-a-spostarsi\/\" \/>\n<meta property=\"og:locale\" content=\"it_IT\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Il Polo Nord Magnetico continua a spostarsi - ZoomIN Magazine\" \/>\n<meta property=\"og:description\" content=\"Il polo Nord magnetico continua a spostarsi. 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