{"id":265,"date":"2018-04-22T16:41:50","date_gmt":"2018-04-22T16:41:50","guid":{"rendered":"http:\/\/blogs.nicholas.duke.edu\/cocosnazca\/?p=265"},"modified":"2018-04-23T17:27:29","modified_gmt":"2018-04-23T17:27:29","slug":"first-deployment-magnetometer","status":"publish","type":"post","link":"https:\/\/blogs.nicholas.duke.edu\/cocosnazca\/2018\/04\/22\/first-deployment-magnetometer\/","title":{"rendered":"First Deployment (Magnetometer!)"},"content":{"rendered":"
\"\"
The magnetometer on the deck of the ship<\/figcaption><\/figure>\n
\"\"
Science party watching the magnetometer be deployed. From left to right: Dominik, Gabby, Charlie, Scott, Elvira, and Iker.<\/figcaption><\/figure>\n

Lavas on the seafloor have different magnetic properties. These can be detected using a magnetometer, a cylindrical instrument towed 300m behind the highly magnetic ship.\u00a0 A magnetic survey of an area of the ocean floor typically shows a pattern of stripes arising from variations in the magnetism of the lava flows. The magnetism of the lavas is set in place when they cool and crystallize.\u00a0 Some comes from the iron content of the lavas.\u00a0 But the pattern of stripes is not related to the iron content.\u00a0 The pattern comes from the regular reversals of the Earth\u2019s magnetic field, switching direction from south to north and back every few hundred thousand years. The stripes come from bands of lavas being erupted from a linear fissure during alternations of the Earth\u2019s magnetic field.\u00a0 The survey shows the existence of ancient fissures and is critical in understanding how the ocean floor has been formed.<\/p>\n

\"\"
Cruise Research Tech, Josh, deploying the magnetometer.<\/figcaption><\/figure>\n

 <\/p>\n","protected":false},"excerpt":{"rendered":"

Lavas on the seafloor have different magnetic properties. These can be detected using a magnetometer, a cylindrical instrument towed 300m behind the highly magnetic ship.\u00a0 A magnetic survey of an area of the ocean floorContinue reading<\/a><\/p>\n","protected":false},"author":684,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"jetpack_post_was_ever_published":false,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":false,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2}},"categories":[3],"tags":[],"coauthors":[5],"class_list":["post-265","post","type-post","status-publish","format-standard","hentry","category-travel"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"","jetpack_sharing_enabled":true,"jetpack_shortlink":"https:\/\/wp.me\/p9Xr9J-4h","jetpack-related-posts":[],"_links":{"self":[{"href":"https:\/\/blogs.nicholas.duke.edu\/cocosnazca\/wp-json\/wp\/v2\/posts\/265","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/blogs.nicholas.duke.edu\/cocosnazca\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/blogs.nicholas.duke.edu\/cocosnazca\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/blogs.nicholas.duke.edu\/cocosnazca\/wp-json\/wp\/v2\/users\/684"}],"replies":[{"embeddable":true,"href":"https:\/\/blogs.nicholas.duke.edu\/cocosnazca\/wp-json\/wp\/v2\/comments?post=265"}],"version-history":[{"count":2,"href":"https:\/\/blogs.nicholas.duke.edu\/cocosnazca\/wp-json\/wp\/v2\/posts\/265\/revisions"}],"predecessor-version":[{"id":270,"href":"https:\/\/blogs.nicholas.duke.edu\/cocosnazca\/wp-json\/wp\/v2\/posts\/265\/revisions\/270"}],"wp:attachment":[{"href":"https:\/\/blogs.nicholas.duke.edu\/cocosnazca\/wp-json\/wp\/v2\/media?parent=265"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blogs.nicholas.duke.edu\/cocosnazca\/wp-json\/wp\/v2\/categories?post=265"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blogs.nicholas.duke.edu\/cocosnazca\/wp-json\/wp\/v2\/tags?post=265"},{"taxonomy":"author","embeddable":true,"href":"https:\/\/blogs.nicholas.duke.edu\/cocosnazca\/wp-json\/wp\/v2\/coauthors?post=265"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}