{"id":17872,"date":"2023-12-07T04:56:57","date_gmt":"2023-12-06T23:26:57","guid":{"rendered":"https:\/\/vajiramandravi.com\/current-affairs\/?p=17872"},"modified":"2025-04-05T07:12:17","modified_gmt":"2025-04-05T01:42:17","slug":"kopili-fault-zone","status":"publish","type":"post","link":"https:\/\/vajiramandravi.com\/current-affairs\/kopili-fault-zone\/","title":{"rendered":"Kopili fault zone"},"content":{"rendered":"<h2>About Kopili fault zone<\/h2>\n<ul>\n<li>It is a 300 km long and 50 km wide lineament situated\u00a0in the northeastern region (NER).<\/li>\n<li>It extends from the\u00a0western part of Manipur to the\u00a0tri-junction of Bhutan, Arunachal Pradesh, and Assam.<\/li>\n<li>It is closer to\u00a0Himalayan Frontal Thrust.<\/li>\n<li>This is a seismically active area falling in the\u00a0highest Seismic Hazard Zone V.<\/li>\n<li>It is associated with collisional tectonics because of the Indian Plate subducting beneath the Eurasian Plate.\u00a0<\/li>\n<li>The fault itself is a transpressional fracture that generates lower crustal dextral strike-slip earthquakes.<\/li>\n<li>A tectonic depression filled up by the alluvium of the Kopilli river and its tributaries, the Kopili fault zone has\u00a0witnessed many seismic activities in the past including the 1869 earthquake (7.8 magnitude) and the 1943 earthquake (7.3 magnitude).<\/li>\n<\/ul>\n<h2>Key points about the research<\/h2>\n<ul>\n<li>Seismogenic liquefaction features, including multiple\u00a0sand dykes and sand sills, were pinpointed in the Kopili Fault zone.<\/li>\n<li>To mitigate future earthquake occurrences in the Kopili Fault zone, scientists conducted investigations at three trench sites in the floodplain deposits of the Kolong River, near KF.<\/li>\n<li>The identified liquefaction features, including sand dykes and sand sills, directly respond to the liquefaction of saturated sediment induced during past seismic activity.<\/li>\n<li>The study utilized a technique called\u00a0optically stimulated luminescence (OSL) dating on seven samples from marker horizons to constrain the chronology of liquefaction features.<\/li>\n<li>The OSL age constraints revealed evidence of\u00a0two earthquake-induced liquefaction events near the\u00a0Kopili Fault approximately 480 years ago.<\/li>\n<li>This crucial information aids in the interpretation of the long-term rupture history of faults and intraplate seismicity in the region.<\/li>\n<\/ul>\n<hr \/>\n<h3>Q1) What is Dyke?<\/h3>\n<p>In geology, a tabular or sheetlike igneous body that is often oriented vertically or steeply inclined to the bedding of preexisting intruded rocks is known as Dyke.<\/p>\n<p><strong>Source: <\/strong><a href=\"https:\/\/pib.gov.in\/PressReleasePage.aspx?PRID=1982961\" target=\"_blank\" rel=\"nofollow noopener\"><u>Paleoseismic investigations through earthquake induced liquefaction features can trace earthquake history &amp; prepare for future<\/u><\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Kopili fault zone is a 300 km long and 50 km wide lineament situated in the northeastern region (NER).<\/p>\n","protected":false},"author":5,"featured_media":17873,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[1],"tags":[],"class_list":{"0":"post-17872","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\/17872","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=17872"}],"version-history":[{"count":0,"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/posts\/17872\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/media\/17873"}],"wp:attachment":[{"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/media?parent=17872"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/categories?post=17872"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/tags?post=17872"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}