{"id":1230810,"date":"2020-11-01T23:34:03","date_gmt":"2020-11-01T23:34:03","guid":{"rendered":"https:\/\/www.pressenza.com\/?p=1230810"},"modified":"2020-11-01T23:34:03","modified_gmt":"2020-11-01T23:34:03","slug":"cuando-el-norte-se-convirtio-en-el-sur-como-fue-la-ultima-reversion-magnetica-de-la-tierra","status":"publish","type":"post","link":"https:\/\/www.pressenza.com\/es\/2020\/11\/cuando-el-norte-se-convirtio-en-el-sur-como-fue-la-ultima-reversion-magnetica-de-la-tierra\/","title":{"rendered":"Cuando el norte se convirti\u00f3 en el sur: c\u00f3mo fue la \u00faltima reversi\u00f3n magn\u00e9tica de la Tierra"},"content":{"rendered":"

Los campos magn\u00e9ticos de la Tierra normalmente cambian cada 200 a 300 milenios, pero la \u00faltima vez tardaron m\u00e1s del doble de ese tiempo.<\/strong><\/p>\n

Cient\u00edficos japoneses han estudiado en detalle los eventos geol\u00f3gicos que tuvieron lugar en nuestro planeta antes de la \u00faltima reversi\u00f3n de los polos magn\u00e9ticos, acontecida hace unos 773.000 a\u00f1os, y determinaron que todo el proceso se prolong\u00f3 como m\u00ednimo por\u00a020.000 a\u00f1os, mientras que al menos 10.000 a\u00f1os antes de su inicio el campo geomagn\u00e9tico de la Tierra se volvi\u00f3 inestable.<\/p>\n

El\u00a0estudio<\/a>\u00a0fue publicado en la revista Progress in Earth and Planetary Science el 1 de septiembre, y seg\u00fan coment\u00f3 su autor principal Yuki Haneda, del Instituto Nacional de Investigaci\u00f3n Polar (NIPR), en un\u00a0comunicado<\/a>\u00a0publicado el pasado jueves, representa \u00abuno de los registros paleomagn\u00e9ticos m\u00e1s detallados durante la inversi\u00f3n geomagn\u00e9tica de Matuyama-Brunhes, ofreciendo un profundo panorama del mecanismo de la inversi\u00f3n geomagn\u00e9tica\u00bb.<\/p>\n

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\"Revelan<\/picture><\/div>\n<\/div>\n
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Revelan que el campo magn\u00e9tico de la Tierra puede cambiar 10 veces m\u00e1s r\u00e1pido de lo pensado<\/a><\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/article>\n<\/div>\n<\/div>\n

Los polos magn\u00e9ticos normalmente cambian cada 200 o 300 milenios, pero la \u00faltima vez tardaron m\u00e1s del doble de ese tiempo. Si bien no se conocen mucho los efectos exactos de estas reversiones en la vida terrestre, el estudio de los investigadores japoneses ofrece un mejor entendimiento de los procesos geol\u00f3gicos previos al cambio y c\u00f3mo el planeta reaccion\u00f3 despu\u00e9s.<\/p>\n

Para reconstruir la secuencia completa de la \u00faltima inversi\u00f3n geomagn\u00e9tica, los cient\u00edficos realizaron an\u00e1lisis paleomagn\u00e9ticos de rocas de nuevas muestras de la secci\u00f3n compuesta de Chiba, una sucesi\u00f3n marina continua y expandida en el centro de Jap\u00f3n, cont\u00f3 Haneda, quien explic\u00f3 que se considera que esta zona contiene el registro sedimentario marino m\u00e1s detallado de aquel cambio de campos magn\u00e9ticos.<\/p>\n

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NIPR \/ AIST \/ Ibaraki University<\/span><\/span><\/figcaption><\/figure>\n

Ahora los cient\u00edficos planean estudiar los microf\u00f3siles marinos y polen de las muestras recolectadas para descubrir c\u00f3mo la reversi\u00f3n geomagn\u00e9tica influy\u00f3 en el plancton y las plantas.<\/p>\n

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Yuki Haneda recolecta junto con sus colegas muestras de la secci\u00f3n compuesta de Chiba, Jap\u00f3n.<\/span><\/span>NIPR \/ AIST \/ Ibaraki University<\/span><\/span><\/figcaption><\/figure>\n","protected":false},"excerpt":{"rendered":"

Los campos magn\u00e9ticos de la Tierra normalmente cambian cada 200 a 300 milenios, pero la \u00faltima vez tardaron m\u00e1s del doble de ese tiempo. Cient\u00edficos japoneses han estudiado en detalle los eventos geol\u00f3gicos que tuvieron lugar en nuestro planeta antes…<\/p>\n","protected":false},"author":1181,"featured_media":1230811,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[65,497],"tags":[598,23317,8302],"class_list":["post-1230810","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-asia-es","category-ciencia-tecnologia","tag-ciencia","tag-internacional","tag-japon-es"],"yoast_head":"\nCuando el norte se convirti\u00f3 en el sur: c\u00f3mo fue la \u00faltima reversi\u00f3n magn\u00e9tica de la Tierra<\/title>\n<meta name=\"description\" content=\"Los campos magn\u00e9ticos de la Tierra normalmente cambian cada 200 a 300 milenios, pero la \u00faltima vez tardaron m\u00e1s del doble de ese tiempo. 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