{"id":22112,"date":"2026-09-29T12:42:08","date_gmt":"2026-09-29T07:12:08","guid":{"rendered":"https:\/\/vajiramandravi.com\/current-affairs\/?p=22112"},"modified":"2026-09-29T15:48:07","modified_gmt":"2026-09-29T10:18:07","slug":"swell-waves","status":"publish","type":"post","link":"https:\/\/vajiramandravi.com\/current-affairs\/swell-waves\/","title":{"rendered":"Swell Wave"},"content":{"rendered":"<h2><b>Swell Wave Latest News<\/b><\/h2>\n<p><span style=\"font-weight: 400;\">Recently, the Indian National Centre for Ocean Information Services (INCOIS) has issued a Red Alert across all coastal districts in Keralam, warning residents and authorities of dangerous sea conditions caused by potential swell waves.\u00a0\u00a0<\/span><\/p>\n<h2><b>About Swell Wave<\/b><\/h2>\n<ul>\n<li><span style=\"font-weight: 400;\">Swell waves are <\/span><b>long-wavelength ocean waves<\/b><span style=\"font-weight: 400;\"> formed on the surface of the seas and travel away from their places of origin.<\/span><\/li>\n<li><span style=\"font-weight: 400;\">These are composed of a <\/span><b>series of surface gravity waves.<\/b><\/li>\n<li><span style=\"font-weight: 400;\">Swell waves <\/span><b>are also called Kallakkadal waves<\/b><span style=\"font-weight: 400;\"> in India, which is a colloquial term used by <\/span><b>Keralam fishermen.<\/b><\/li>\n<li><span style=\"font-weight: 400;\">These waves organise themselves <\/span><b>into groups of similar heights and periods<\/b><span style=\"font-weight: 400;\">, and then travel <\/span><b>long distances<\/b><span style=\"font-weight: 400;\"> without much change.\u00a0<\/span><\/li>\n<li><b>Early warning systems in India: <\/b><a href=\"https:\/\/vajiramandravi.com\/current-affairs\/indian-national-centre-for-ocean-information-services-incois\/\" target=\"_blank\"><span style=\"font-weight: 400;\">Indian National Centre for Ocean Information Services (INCOIS) <\/span><\/a><b>Swell Surge Forecast System<\/b><span style=\"font-weight: 400;\"> launched in 2020 which gives forewaring seven days in advance.<\/span><\/li>\n<li><b>Formation<\/b>\n<ul>\n<li><span style=\"font-weight: 400;\">They are usually created by <\/span><b>windstorms or other weather systems.<\/b><\/li>\n<li><b>Windstorms and other powerful air current systems<\/b><span style=\"font-weight: 400;\"> transfer energy from the air to water, making swell waves more powerful than locally generated waves.\u00a0<\/span><\/li>\n<li><span style=\"font-weight: 400;\">During such storms, <\/span><b>huge energy transfer takes place<\/b><span style=\"font-weight: 400;\"> from the air into the water, leading to the formation <\/span><b>of very high waves.<\/b><span style=\"font-weight: 400;\"> Such waves can travel <\/span><b>thousands of kilometres<\/b><span style=\"font-weight: 400;\"> from the storm centre until they strike shore.<\/span><\/li>\n<li><span style=\"font-weight: 400;\">They occur <\/span><b>not due to the local winds<\/b><span style=\"font-weight: 400;\">, but rather due <\/span><b>to distant storms like hurricanes<\/b><span style=\"font-weight: 400;\">, or even long periods of fierce gale winds.<\/span><\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<h2><b>Features of Swell Wave<\/b><\/h2>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Swells have a <\/span><b>narrower range of frequencies<\/b><span style=\"font-weight: 400;\"> and directions than locally generated wind waves.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">It is because swell <\/span><b>waves have dispersed from their generation<\/b><span style=\"font-weight: 400;\"> area, <\/span><b>have dissipated and therefore lost <\/b><span style=\"font-weight: 400;\">an amount of randomness, taking on a more defined shape and direction.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">These waves can <\/span><b>propagate in directions<\/b><span style=\"font-weight: 400;\"> that <\/span><b>differ from the direction of the wind<\/b><span style=\"font-weight: 400;\">, in contrast to a wind sea.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Their wavelengths may <\/span><b>rarely exceed more than 150 m<\/b><span style=\"font-weight: 400;\">. Swell wavelength, also, varies from event to event. Occasionally, swells which are longer than 700 m occur as a result of the most severe storms.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">It <\/span><b>occurs without precursors<\/b><span style=\"font-weight: 400;\"> or any kind of local wind activity and as a result.<\/span><\/li>\n<\/ul>\n<p><b>Source: <\/b><strong><a href=\"https:\/\/www.thehindu.com\/news\/national\/kerala\/swell-waves-reach-west-coast-red-alert-continues-along-keralam-coast\/article71513280.ece\" target=\"_blank\" rel=\"nofollow noopener\">TH<\/a><\/strong><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Swell waves are long-wavelength ocean waves formed on the surface of the seas and travel away from their places of origin. Read more about Swell Wave, Meaning, Formation, Features, Latest News.<\/p>\n","protected":false},"author":5,"featured_media":126713,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[1],"tags":[21,10559,22,23],"class_list":["post-22112","post","type-post","status-publish","format-standard","has-post-thumbnail","category-upsc-prelims-current-affairs","tag-prelims-pointers","tag-swell-wave","tag-upsc-current-affairs","tag-upsc-prelims-current-affairs","no-featured-image-padding"],"acf":[],"_links":{"self":[{"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/posts\/22112","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=22112"}],"version-history":[{"count":3,"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/posts\/22112\/revisions"}],"predecessor-version":[{"id":126785,"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/posts\/22112\/revisions\/126785"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/media\/126713"}],"wp:attachment":[{"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/media?parent=22112"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/categories?post=22112"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/tags?post=22112"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}