{"id":87937,"date":"2025-06-01T06:58:10","date_gmt":"2025-06-01T06:58:10","guid":{"rendered":"https:\/\/exam.pscnotes.com\/mcq\/?p=87937"},"modified":"2025-06-01T06:58:10","modified_gmt":"2025-06-01T06:58:10","slug":"which-of-the-following-statements-is-are-correct-1-hypocenter-is","status":"publish","type":"post","link":"https:\/\/exam.pscnotes.com\/mcq\/which-of-the-following-statements-is-are-correct-1-hypocenter-is\/","title":{"rendered":"Which of the following statements is\/are correct ?\n  1. Hypocenter is"},"content":{"rendered":"<p>Which of the following statements is\/are correct ?<\/p>\n<ul>\n<li>1. Hypocenter is the point on the surface of the Earth, nearest to the focus.<\/li>\n<li>2. Velocity of earthquake waves is higher in denser materials.<\/li>\n<li>3. P waves move faster and are the first to arrive at the surface of the Earth.<\/li>\n<\/ul>\n<p>Select the correct answer using the code given below :<\/p>\n<p>[amp_mcq option1=&#8221;1 and 2&#8243; option2=&#8221;2 and 3&#8243; option3=&#8221;1 and 3&#8243; option4=&#8221;3 only&#8221; correct=&#8221;option2&#8243;]<\/p>\n<div class=\"psc-box-pyq-exam-year-detail\">\n<div class=\"pyq-exam\">\n<div class=\"psc-heading\">This question was previously asked in<\/div>\n<div class=\"psc-title line-ellipsis\">UPSC NDA-1 &#8211; 2023<\/div>\n<\/div>\n<div class=\"pyq-exam-psc-buttons\"><a href=\"\/pyq\/pyq-upsc-nda-1-2023.pdf\" target=\"_blank\" class=\"psc-pdf-button\" rel=\"noopener\">Download PDF<\/a><a href=\"\/pyq-upsc-nda-1-2023\" target=\"_blank\" class=\"psc-attempt-button\" rel=\"noopener\">Attempt Online<\/a><\/div>\n<\/div>\n<section id=\"pyq-correct-answer\">\nThe correct option is B.<br \/>\n<\/section>\n<section id=\"pyq-key-points\">\nStatement 1 is incorrect because the hypocenter is the point of origin of the earthquake *within* the Earth, while the epicenter is the point *on the surface* directly above the hypocenter. Statement 2 is generally correct as seismic wave velocity increases with the rigidity and density of the medium. Statement 3 is correct; P waves (primary or compressional waves) are faster than S waves (secondary or shear waves) and arrive first.<br \/>\n<\/section>\n<section id=\"pyq-additional-information\">\n1. Hypocenter (or focus) is the point below the Earth&#8217;s surface where the earthquake originates. The epicenter is the point on the Earth&#8217;s surface directly above the hypocenter.<br \/>\n2. Seismic wave speeds depend on the elastic properties and density of the material. Wave speed is proportional to the square root of the ratio of an elastic modulus (like bulk modulus or shear modulus) to density. While density increases with depth, the elastic moduli generally increase faster, leading to an overall increase in wave speed with depth in the Earth&#8217;s mantle and core.<br \/>\n3. P waves are longitudinal waves that can travel through solids, liquids, and gases. S waves are transverse waves that can only travel through solids. Because P waves involve compression and expansion, they travel faster than S waves, which involve shearing motion.<br \/>\n<\/section>\n","protected":false},"excerpt":{"rendered":"<p>Which of the following statements is\/are correct ? 1. Hypocenter is the point on the surface of the Earth, nearest to the focus. 2. Velocity of earthquake waves is higher in denser materials. 3. P waves move faster and are the first to arrive at the surface of the Earth. Select the correct answer using &#8230; <\/p>\n<p class=\"read-more-container\"><a title=\"Which of the following statements is\/are correct ?\n  1. Hypocenter is\" class=\"read-more button\" href=\"https:\/\/exam.pscnotes.com\/mcq\/which-of-the-following-statements-is-are-correct-1-hypocenter-is\/#more-87937\">Detailed Solution<span class=\"screen-reader-text\">Which of the following statements is\/are correct ?<br \/>\n  1. Hypocenter is<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1093],"tags":[1105,1217,1106],"class_list":["post-87937","post","type-post","status-publish","format-standard","hentry","category-upsc-nda-1","tag-1105","tag-the-earthquake","tag-world-and-physical-geography","no-featured-image-padding"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v22.2 (Yoast SEO v23.3) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Which of the following statements is\/are correct ?  1. Hypocenter is<\/title>\n<meta name=\"description\" content=\"The correct option is B. Statement 1 is incorrect because the hypocenter is the point of origin of the earthquake *within* the Earth, while the epicenter is the point *on the surface* directly above the hypocenter. Statement 2 is generally correct as seismic wave velocity increases with the rigidity and density of the medium. Statement 3 is correct; P waves (primary or compressional waves) are faster than S waves (secondary or shear waves) and arrive first.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/exam.pscnotes.com\/mcq\/which-of-the-following-statements-is-are-correct-1-hypocenter-is\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Which of the following statements is\/are correct ?  1. Hypocenter is\" \/>\n<meta property=\"og:description\" content=\"The correct option is B. Statement 1 is incorrect because the hypocenter is the point of origin of the earthquake *within* the Earth, while the epicenter is the point *on the surface* directly above the hypocenter. Statement 2 is generally correct as seismic wave velocity increases with the rigidity and density of the medium. Statement 3 is correct; P waves (primary or compressional waves) are faster than S waves (secondary or shear waves) and arrive first.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/exam.pscnotes.com\/mcq\/which-of-the-following-statements-is-are-correct-1-hypocenter-is\/\" \/>\n<meta property=\"og:site_name\" content=\"MCQ and Quiz for Exams\" \/>\n<meta property=\"article:published_time\" content=\"2025-06-01T06:58:10+00:00\" \/>\n<meta name=\"author\" content=\"rawan239\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"rawan239\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"1 minute\" \/>\n<!-- \/ Yoast SEO Premium plugin. -->","yoast_head_json":{"title":"Which of the following statements is\/are correct ?  1. Hypocenter is","description":"The correct option is B. Statement 1 is incorrect because the hypocenter is the point of origin of the earthquake *within* the Earth, while the epicenter is the point *on the surface* directly above the hypocenter. Statement 2 is generally correct as seismic wave velocity increases with the rigidity and density of the medium. Statement 3 is correct; P waves (primary or compressional waves) are faster than S waves (secondary or shear waves) and arrive first.","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/exam.pscnotes.com\/mcq\/which-of-the-following-statements-is-are-correct-1-hypocenter-is\/","og_locale":"en_US","og_type":"article","og_title":"Which of the following statements is\/are correct ?  1. Hypocenter is","og_description":"The correct option is B. Statement 1 is incorrect because the hypocenter is the point of origin of the earthquake *within* the Earth, while the epicenter is the point *on the surface* directly above the hypocenter. Statement 2 is generally correct as seismic wave velocity increases with the rigidity and density of the medium. Statement 3 is correct; P waves (primary or compressional waves) are faster than S waves (secondary or shear waves) and arrive first.","og_url":"https:\/\/exam.pscnotes.com\/mcq\/which-of-the-following-statements-is-are-correct-1-hypocenter-is\/","og_site_name":"MCQ and Quiz for Exams","article_published_time":"2025-06-01T06:58:10+00:00","author":"rawan239","twitter_card":"summary_large_image","twitter_misc":{"Written by":"rawan239","Est. reading time":"1 minute"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"WebPage","@id":"https:\/\/exam.pscnotes.com\/mcq\/which-of-the-following-statements-is-are-correct-1-hypocenter-is\/","url":"https:\/\/exam.pscnotes.com\/mcq\/which-of-the-following-statements-is-are-correct-1-hypocenter-is\/","name":"Which of the following statements is\/are correct ? 1. Hypocenter is","isPartOf":{"@id":"https:\/\/exam.pscnotes.com\/mcq\/#website"},"datePublished":"2025-06-01T06:58:10+00:00","dateModified":"2025-06-01T06:58:10+00:00","author":{"@id":"https:\/\/exam.pscnotes.com\/mcq\/#\/schema\/person\/5807dafeb27d2ec82344d6cbd6c3d209"},"description":"The correct option is B. Statement 1 is incorrect because the hypocenter is the point of origin of the earthquake *within* the Earth, while the epicenter is the point *on the surface* directly above the hypocenter. Statement 2 is generally correct as seismic wave velocity increases with the rigidity and density of the medium. Statement 3 is correct; P waves (primary or compressional waves) are faster than S waves (secondary or shear waves) and arrive first.","breadcrumb":{"@id":"https:\/\/exam.pscnotes.com\/mcq\/which-of-the-following-statements-is-are-correct-1-hypocenter-is\/#breadcrumb"},"inLanguage":"en-US","potentialAction":[{"@type":"ReadAction","target":["https:\/\/exam.pscnotes.com\/mcq\/which-of-the-following-statements-is-are-correct-1-hypocenter-is\/"]}]},{"@type":"BreadcrumbList","@id":"https:\/\/exam.pscnotes.com\/mcq\/which-of-the-following-statements-is-are-correct-1-hypocenter-is\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/exam.pscnotes.com\/mcq\/"},{"@type":"ListItem","position":2,"name":"UPSC NDA-1","item":"https:\/\/exam.pscnotes.com\/mcq\/category\/upsc-nda-1\/"},{"@type":"ListItem","position":3,"name":"Which of the following statements is\/are correct ? 1. Hypocenter is"}]},{"@type":"WebSite","@id":"https:\/\/exam.pscnotes.com\/mcq\/#website","url":"https:\/\/exam.pscnotes.com\/mcq\/","name":"MCQ and Quiz for Exams","description":"","potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/exam.pscnotes.com\/mcq\/?s={search_term_string}"},"query-input":"required name=search_term_string"}],"inLanguage":"en-US"},{"@type":"Person","@id":"https:\/\/exam.pscnotes.com\/mcq\/#\/schema\/person\/5807dafeb27d2ec82344d6cbd6c3d209","name":"rawan239","image":{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/exam.pscnotes.com\/mcq\/#\/schema\/person\/image\/","url":"https:\/\/secure.gravatar.com\/avatar\/761a7274f9cce048fa5b921221e7934820d74514df93ef195a9d22af0c1c9001?s=96&d=mm&r=g","contentUrl":"https:\/\/secure.gravatar.com\/avatar\/761a7274f9cce048fa5b921221e7934820d74514df93ef195a9d22af0c1c9001?s=96&d=mm&r=g","caption":"rawan239"},"sameAs":["https:\/\/exam.pscnotes.com"],"url":"https:\/\/exam.pscnotes.com\/mcq\/author\/rawan239\/"}]}},"amp_enabled":true,"_links":{"self":[{"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/posts\/87937","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/comments?post=87937"}],"version-history":[{"count":0,"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/posts\/87937\/revisions"}],"wp:attachment":[{"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/media?parent=87937"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/categories?post=87937"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/tags?post=87937"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}