{"id":16287,"date":"2023-10-25T02:14:04","date_gmt":"2023-10-24T20:44:04","guid":{"rendered":"https:\/\/vajiramandravi.com\/current-affairs\/?p=16287"},"modified":"2025-04-04T08:15:24","modified_gmt":"2025-04-04T02:45:24","slug":"ong-valley-caldera","status":"publish","type":"post","link":"https:\/\/vajiramandravi.com\/current-affairs\/ong-valley-caldera\/","title":{"rendered":"Long Valley Caldera"},"content":{"rendered":"<h2>About Long Valley Caldera<\/h2>\n<ul>\n<li>It is located in the Eastern\u00a0Sierra Nevada Mountains of California, United states of America (USA).<\/li>\n<li>It is a\u00a0dormant supervolcano.<\/li>\n<li>It was\u00a0formed by a super-eruption about 760,000 years ago that blasted 140 cubic miles of magma, covering much of east-central California in hot ash that was blown as far away as present-day Nebraska.<\/li>\n<li>It has been unleashing earthquake swarms on a regular basis since 1978, raising concerns that it might be at risk of erupting.<\/li>\n<\/ul>\n<h2>What is Caldera?<\/h2>\n<ul>\n<li>It is a\u00a0depression created after a\u00a0volcano releases the majority of the contents of its magma chamber in an explosive eruption.<\/li>\n<li>Without any structural support below, the land around the erupting volcanic vent or vents collapses inwardly, creating the bowl-shaped caldera.<\/li>\n<li>A caldera-causing eruption is the most devastating type of volcanic eruption.<\/li>\n<li>These are formed by\u00a0the inward collapse of a volcano.\u00a0<\/li>\n<li>Calderas may have parts of their sides missing because land collapses unevenly.<\/li>\n<li>Types of Calderas\u00a0\n<ul>\n<li>Crater-Lake Calderas:\u00a0It is a result from the\u00a0collapse of a stratovolcano after a Plinian eruption, the most explosive type of volcanic eruption.<\/li>\n<li>Plinian eruptions release massive amounts of lava, volcanic ash, and rocks.\u00a0<\/li>\n<li>Shield Volcano Calderas: These calderas do not result\u00a0from singular explosive eruptions.<\/li>\n<li>They instead subside in gradual stages, due to the episodic release of lava. This less-explosive release of lava, known as lava fountaining, is characteristic of shield volcanoes.<\/li>\n<li>As a shield volcano periodically releases lava, it produces nested or terraced depressions rather than a large bowl-shaped caldera.<\/li>\n<li>It is composed of dormant and active shield volcanoes.<\/li>\n<li>Resurgent Calderas: These are the\u00a0largest volcanic structures on Earth.<\/li>\n<li>They are not associated with one particular volcano, but instead result from the widespread collapse of vast magma chambers.<\/li>\n<li>This caldera collapse is produced by incredibly destructive eruptions known as pyroclastic sheet flows, the likes of which have not occurred in historic times.\u00a0<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<hr \/>\n<h3>Q1) What is a volcano?<\/h3>\n<p>It is a geological feature on the Earth&#8217;s surface that is characterized by the eruption of molten rock, ash, and gases from beneath the Earth&#8217;s crust. Volcanoes are a result of the Earth&#8217;s dynamic processes, primarily driven by the movement of tectonic plates.<\/p>\n<p><strong>Source: <\/strong><a href=\"https:\/\/www.wionews.com\/science\/californias-supervolcano-shows-signs-of-activity-over-2000-earthquakes-rumble-beneath-valley-650724\" target=\"_blank\" rel=\"nofollow noopener\"><u>California&#8217;s supervolcano shows signs of activity, over 2,000 earthquakes rumble beneath valley<\/u><\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Long Valley Caldera is located in the Eastern Sierra Nevada Mountains of California, United states of America (USA).<\/p>\n","protected":false},"author":5,"featured_media":16288,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[1],"tags":[],"class_list":{"0":"post-16287","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\/16287","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=16287"}],"version-history":[{"count":0,"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/posts\/16287\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/media\/16288"}],"wp:attachment":[{"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/media?parent=16287"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/categories?post=16287"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/tags?post=16287"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}