{"id":220347,"date":"2014-06-18T18:00:00","date_gmt":"2014-06-18T22:00:00","guid":{"rendered":"27057a0d3956ec6e804379e48569ee4e"},"modified":"2014-06-18T18:00:00","modified_gmt":"2014-06-18T22:00:00","slug":"earths-ever-changing-magnetic-field","status":"publish","type":"post","link":"https:\/\/spaceweekly.com\/?p=220347","title":{"rendered":"Earth\u2019s ever-changing magnetic field"},"content":{"rendered":"<p>\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" src=\"http:\/\/www.esa.int\/var\/esa\/storage\/images\/esa_multimedia\/videos\/2014\/06\/earth_s_ever-changing_magnetic_field\/14582069-2-eng-GB\/Earth_s_ever-changing_magnetic_field_small.png\" width=\"170\" height=\"96\" align=\"left\" hspace=\"8\" \/><\/p>\n<p>This animation shows changes in Earth\u2019s magnetic field from January&nbsp;to June 2014 as measured by ESA\u2019s Swarm trio of satellites.<br \/>\nThe magnetic field protects us from cosmic radiation and charged particles&nbsp;that bombard Earth, but it is in a permanent state of flux. Magnetic north&nbsp;wanders, and every few hundred thousand years the polarity flips so that a&nbsp;compass would point south instead of north. Moreover, the strength of the&nbsp;magnetic field constantly changes \u2013 and it is currently showing signs of&nbsp;significant weakening.<br \/>The field is particularly weak over the South Atlantic Ocean \u2013 known as the&nbsp;South Atlantic Anomaly. This weak field has indirectly caused many temporary&nbsp;satellite \u2018hiccups\u2019 (called Single Event Upsets) as the satellites are&nbsp;exposed to strong radiation over this area.&nbsp;\n<\/p>\n<p>\n<a href=\"http:\/\/www.esa.int\/Our_Activities\/Observing_the_Earth\/Swarm\">More about Swarm<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" src=\"http:\/\/www.esa.int\/var\/esa\/storage\/images\/esa_multimedia\/videos\/2014\/06\/earth_s_ever-changing_magnetic_field\/14582069-2-eng-GB\/Earth_s_ever-changing_magnetic_field_small.png\" width=\"170\" height=\"96\" align=\"left\" hspace=\"8\" \/><\/p>\n<p>This animation shows changes in Earth\u2019s magnetic field from January&nbsp;to June 2014 as measured by ESA\u2019s Swarm trio of satellites.<br \/>\nThe magnetic field protects us from cosmic radiation and charged particles&nbsp;that bombard Earth, but it is in a permanent state of flux. Magnetic north&nbsp;wanders, and every few hundred thousand years the polarity flips so that a&nbsp;compass would point south instead of north. Moreover, the strength of the&nbsp;magnetic field constantly changes \u2013 and it is currently showing signs of&nbsp;significant weakening.<br \/>The field is particularly weak over the South Atlantic Ocean \u2013 known as the&nbsp;South Atlantic Anomaly. This weak field has indirectly caused many temporary&nbsp;satellite \u2018hiccups\u2019 (called Single Event Upsets) as the satellites are&nbsp;exposed to strong radiation over this area.&nbsp;\n<\/p>\n<p>\n<a href=\"http:\/\/www.esa.int\/Our_Activities\/Observing_the_Earth\/Swarm\">More about Swarm<\/a><\/p>\n","protected":false},"author":5,"featured_media":615444,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[27],"tags":[],"class_list":["post-220347","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-multimedia"],"_links":{"self":[{"href":"https:\/\/spaceweekly.com\/index.php?rest_route=\/wp\/v2\/posts\/220347","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/spaceweekly.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/spaceweekly.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/spaceweekly.com\/index.php?rest_route=\/wp\/v2\/users\/5"}],"replies":[{"embeddable":true,"href":"https:\/\/spaceweekly.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=220347"}],"version-history":[{"count":0,"href":"https:\/\/spaceweekly.com\/index.php?rest_route=\/wp\/v2\/posts\/220347\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/spaceweekly.com\/index.php?rest_route=\/wp\/v2\/media\/615444"}],"wp:attachment":[{"href":"https:\/\/spaceweekly.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=220347"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/spaceweekly.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=220347"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/spaceweekly.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=220347"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}