{"id":44,"date":"2025-02-19T15:53:51","date_gmt":"2025-02-19T15:53:51","guid":{"rendered":"https:\/\/www.sabrinasanchez.fr\/?post_type=portfolio&#038;p=44"},"modified":"2025-03-14T10:33:03","modified_gmt":"2025-03-14T10:33:03","slug":"excursion","status":"publish","type":"portfolio","link":"https:\/\/www.sabrinasanchez.fr\/en\/portfolio\/excursion\/","title":{"rendered":"Excursion"},"content":{"rendered":"<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-930feb06 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<p class=\"has-large-font-size wp-block-paragraph\">Illustration for the Excursion project<\/p>\n\n\n\n<p class=\"has-medium-font-size wp-block-paragraph\">Sometimes the magnetic field of the Earth goes on an excursion: the magnetic poles can wander up to very low latitudes, and sometimes are difficult to define. Differently than geomagnetic reversals, on an excursion the field goes back to its preceding polarity.<\/p>\n\n\n\n<p class=\"has-medium-font-size wp-block-paragraph\">This illustration was made for a big project of Dr. Sanja Panovska. The magnetic field lines represent the field shape based on one of her models for the Laschamps excursion, which happened about 41,000 years ago. The lines show a multipolar and complex magnetic field, and we can see the field extensions down to their source, the core. What was going on deep down the core with the geodynamo at that time during the excursion?<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<figure data-wp-context=\"{&quot;imageId&quot;:&quot;6a1b5fb89099e&quot;}\" data-wp-interactive=\"core\/image\" data-wp-key=\"6a1b5fb89099e\" class=\"wp-block-image size-large wp-lightbox-container\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"924\" data-wp-class--hide=\"state.isContentHidden\" data-wp-class--show=\"state.isContentVisible\" data-wp-init=\"callbacks.setButtonStyles\" data-wp-on--click=\"actions.showLightbox\" data-wp-on--load=\"callbacks.setButtonStyles\" data-wp-on--pointerdown=\"actions.preloadImage\" data-wp-on--pointerenter=\"actions.preloadImageWithDelay\" data-wp-on--pointerleave=\"actions.cancelPreload\" data-wp-on-window--resize=\"callbacks.setButtonStyles\" src=\"https:\/\/www.sabrinasanchez.fr\/wp-content\/uploads\/2025\/02\/Symbol_for_insta2-1024x924.png\" alt=\"\" class=\"wp-image-153\" srcset=\"https:\/\/www.sabrinasanchez.fr\/wp-content\/uploads\/2025\/02\/Symbol_for_insta2-1024x924.png 1024w, https:\/\/www.sabrinasanchez.fr\/wp-content\/uploads\/2025\/02\/Symbol_for_insta2-300x271.png 300w, https:\/\/www.sabrinasanchez.fr\/wp-content\/uploads\/2025\/02\/Symbol_for_insta2-768x693.png 768w, https:\/\/www.sabrinasanchez.fr\/wp-content\/uploads\/2025\/02\/Symbol_for_insta2.png 1459w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><button\n\t\t\tclass=\"lightbox-trigger\"\n\t\t\ttype=\"button\"\n\t\t\taria-haspopup=\"dialog\"\n\t\t\tdata-wp-bind--aria-label=\"state.thisImage.triggerButtonAriaLabel\"\n\t\t\tdata-wp-init=\"callbacks.initTriggerButton\"\n\t\t\tdata-wp-on--click=\"actions.showLightbox\"\n\t\t\tdata-wp-style--right=\"state.thisImage.buttonRight\"\n\t\t\tdata-wp-style--top=\"state.thisImage.buttonTop\"\n\t\t>\n\t\t\t<svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"12\" height=\"12\" fill=\"none\" viewbox=\"0 0 12 12\">\n\t\t\t\t<path fill=\"#fff\" d=\"M2 0a2 2 0 0 0-2 2v2h1.5V2a.5.5 0 0 1 .5-.5h2V0H2Zm2 10.5H2a.5.5 0 0 1-.5-.5V8H0v2a2 2 0 0 0 2 2h2v-1.5ZM8 12v-1.5h2a.5.5 0 0 0 .5-.5V8H12v2a2 2 0 0 1-2 2H8Zm2-12a2 2 0 0 1 2 2v2h-1.5V2a.5.5 0 0 0-.5-.5H8V0h2Z\" \/>\n\t\t\t<\/svg>\n\t\t<\/button><\/figure>\n<\/div>\n<\/div>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>","protected":false},"excerpt":{"rendered":"<p>Illustration pour le projet Excursion Quelques fois le champ magn\u00e9tique de la Terre fait une excursion : les p\u00f4les magn\u00e9tiques se prom\u00e8nent jusqu&rsquo;\u00e0 des latitudes tr\u00e8s basses, et le champ devient moins dipolaire. C&rsquo;est un \u00e9v\u00e9nement diff\u00e9rent des inversions g\u00e9omagn\u00e9tiques, car finalement les p\u00f4les magn\u00e9tiques reviennent \u00e0 la m\u00eame polarit\u00e9. Cette illustration a \u00e9t\u00e9 faite [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":153,"template":"","portfolio-categories":[8],"portfolio-tags":[],"class_list":["post-44","portfolio","type-portfolio","status-publish","has-post-thumbnail","hentry","portfolio-categories-illustration"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.7 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Excursion - Sabrina Sanchez<\/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.sabrinasanchez.fr\/en\/portfolio\/excursion\/\" \/>\n<meta property=\"og:locale\" content=\"en_GB\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Excursion - Sabrina Sanchez\" \/>\n<meta property=\"og:description\" content=\"Illustration pour le projet Excursion Quelques fois le champ magn\u00e9tique de la Terre fait une excursion : les p\u00f4les magn\u00e9tiques se prom\u00e8nent jusqu&rsquo;\u00e0 des latitudes tr\u00e8s basses, et le champ devient moins dipolaire. C&rsquo;est un \u00e9v\u00e9nement diff\u00e9rent des inversions g\u00e9omagn\u00e9tiques, car finalement les p\u00f4les magn\u00e9tiques reviennent \u00e0 la m\u00eame polarit\u00e9. 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