{"id":3346,"date":"2023-02-26T12:04:28","date_gmt":"2023-02-26T06:34:28","guid":{"rendered":"https:\/\/vajiramandravi.com\/current-affairs\/?p=3346"},"modified":"2025-03-26T11:51:44","modified_gmt":"2025-03-26T06:21:44","slug":"what-is-the-earths-innermost-inner-core","status":"publish","type":"post","link":"https:\/\/vajiramandravi.com\/current-affairs\/what-is-the-earths-innermost-inner-core\/","title":{"rendered":"What is the Earth\u2019s innermost inner core?"},"content":{"rendered":"<h2>\u00a0About Earth\u2019s innermost inner core (IMIC):<\/h2>\n<ul>\n<li>It is a <strong>400-mile-wide (644-kilometer-wide) ball of metal.<\/strong><\/li>\n<li>IMIC <strong>exists in a solid state<\/strong> as an <strong>alloy of iron and nickel<\/strong> <strong>because<\/strong> of the <strong>extreme pressure at the center<\/strong> of the Earth.<\/li>\n<li>Its <strong>temperature is estimated to be about 5,500-6,000 degrees<\/strong> (Celsius\/9,930-10,830 Fahrenheit), similar to the sun&#8217;s surface temperature.<\/li>\n<li>It <strong>has a distinct anisotropy<\/strong>, which is a property of a substance that allows it to <strong>take on different characteristics depending on the angle from which it\u2019s approached<\/strong>.<\/li>\n<li>The concept of the innermost part of the inner core was <strong>first proposed in 2002 by seismologists from Harvard University<\/strong>\u2014 Miaki Ishii and Adam Dziewonski.<\/li>\n<\/ul>\n<h3>About the Inner core of the Earth:<\/h3>\n<ul>\n<li>It is a <strong>solid metallic ball made mainly of iron<\/strong>.<\/li>\n<li>The inner core is <strong>solid due to the pressure<\/strong> caused by the weight put on it by the Earth\u2019s other top layers.<\/li>\n<li>It is <strong>distinct from the outer core, which is a liquid.<\/strong><\/li>\n<li><strong>Radius<\/strong>:<\/li>\n<li>The inner core has an <strong>average radius of 1220 km.<\/strong><\/li>\n<li>The <strong>boundary between the inner and outer core <\/strong>is located at approximately <strong>5150 km below<\/strong> the surface of the Earth.<\/li>\n<li>This boundary is called the <strong>Lehman Seismic Discontinuity<\/strong>.<\/li>\n<\/ul>\n<p><strong>Temperature<\/strong>: Inner core temperatures reach extraordinary levels, <strong>estimated to be between 7,200\u20138,500\u00baF (4,000\u20134,700\u00baC)<\/strong>.<\/p>\n<p><strong>Properties<\/strong>:<\/p>\n<ul>\n<li>It is predicted to have very <strong>high thermal and electrical conductivity.<\/strong><\/li>\n<li>The inner core generates <strong>its own magnetic field and spins a bit faster than the rest of the planet.<\/strong><\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<hr \/>\n<h3>Q1)\u00a0What are the different layers of earth?<\/h3>\n<p>The structure of the earth is divided into four major components: the crust, the mantle, the outer core, and the inner core. Each layer has a unique chemical composition, physical state, and can impact life on Earth&#8217;s surface<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Earth\u2019s innermost inner core  is a 400-mile-wide (644-kilometer-wide) ball of metal.<\/p>\n","protected":false},"author":5,"featured_media":3347,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[1],"tags":[],"class_list":{"0":"post-3346","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-upsc-prelims-current-affairs","8":"no-featured-image-padding"},"acf":[],"_links":{"self":[{"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/posts\/3346","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/users\/5"}],"replies":[{"embeddable":true,"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/comments?post=3346"}],"version-history":[{"count":0,"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/posts\/3346\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/media\/3347"}],"wp:attachment":[{"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/media?parent=3346"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/categories?post=3346"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/tags?post=3346"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}