{"id":9319,"date":"2020-03-09T21:41:56","date_gmt":"2020-03-09T21:41:56","guid":{"rendered":"https:\/\/www.theblackvault.com\/documentarchive\/?p=9319"},"modified":"2023-05-15T22:54:51","modified_gmt":"2023-05-15T22:54:51","slug":"project-blue-book-the-kenneth-arnold-ufo-sighting-mt-rainier-washington-june-24-1947","status":"publish","type":"post","link":"https:\/\/www.theblackvault.com\/documentarchive\/project-blue-book-the-kenneth-arnold-ufo-sighting-mt-rainier-washington-june-24-1947\/","title":{"rendered":"Project Blue Book: The Kenneth Arnold UFO Sighting, Mt. Rainier, Washington, June 24, 1947"},"content":{"rendered":"<h3>Background<\/h3>\n<figure id=\"attachment_17806\" aria-describedby=\"caption-attachment-17806\" style=\"width: 300px\" class=\"wp-caption alignright\"><a href=\"https:\/\/www.theblackvault.com\/documentarchive\/wp-content\/uploads\/2020\/03\/45b6e120-57a8-11e7-9def-a071a1057b75.webp\"><img fetchpriority=\"high\" decoding=\"async\" class=\"wp-image-17806 size-medium\" src=\"https:\/\/www.theblackvault.com\/documentarchive\/wp-content\/uploads\/2020\/03\/45b6e120-57a8-11e7-9def-a071a1057b75-300x278.webp\" alt=\"\" width=\"300\" height=\"278\" srcset=\"https:\/\/www.theblackvault.com\/documentarchive\/wp-content\/uploads\/2020\/03\/45b6e120-57a8-11e7-9def-a071a1057b75-300x278.webp 300w, https:\/\/www.theblackvault.com\/documentarchive\/wp-content\/uploads\/2020\/03\/45b6e120-57a8-11e7-9def-a071a1057b75-150x139.webp 150w, https:\/\/www.theblackvault.com\/documentarchive\/wp-content\/uploads\/2020\/03\/45b6e120-57a8-11e7-9def-a071a1057b75-450x417.webp 450w, https:\/\/www.theblackvault.com\/documentarchive\/wp-content\/uploads\/2020\/03\/45b6e120-57a8-11e7-9def-a071a1057b75-768x711.webp 768w, https:\/\/www.theblackvault.com\/documentarchive\/wp-content\/uploads\/2020\/03\/45b6e120-57a8-11e7-9def-a071a1057b75-600x555.webp 600w, https:\/\/www.theblackvault.com\/documentarchive\/wp-content\/uploads\/2020\/03\/45b6e120-57a8-11e7-9def-a071a1057b75.webp 780w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><\/a><figcaption id=\"caption-attachment-17806\" class=\"wp-caption-text\">Kenneth Arnold, shown in 1966 with a drawing of a flying saucer, reportedly spent \u201cmany long hours of fruitless flying with a camera, trying and failing to find anything like his saucers again.\u201d (Photo Credit: AP)<\/figcaption><\/figure>\n<p>The Kenneth Arnold UFO sighting occurred on June 24, 1947, when businessman Kenneth Arnold was flying his private plane near Mount Rainier in Washington State. According to his report, he observed nine unusual, high-speed objects flying in a &#8220;V&#8221; formation.<\/p>\n<p>Arnold described the objects as flat and somewhat disc-like or saucer-shaped, with a bright, reflective surface. He estimated their speed to be over 1,200 miles per hour, far faster than any known aircraft at the time. His description led to the popular term &#8220;flying saucers&#8221; being coined in relation to UFO sightings.<\/p>\n<p>As for its significance, the Kenneth Arnold sighting is often considered the event that sparked the modern UFO phenomenon. It brought the concept of &#8220;flying saucers&#8221; into the public consciousness and led to a surge in reported sightings in the years that followed.<\/p>\n<p>You can find the official Project Blue Book files archived below on Arnold&#8217;s sighting.<\/p>\n<h3>Document Archive<\/h3>\n<p><img decoding=\"async\" src=\"https:\/\/www.theblackvault.com\/images\/pdf.gif\" \/> <a href=\"https:\/\/documents2.theblackvault.com\/documents\/projectbluebook\/kennetharnoldbluebook.pdf\">Project Blue Book Cases: The Kenneth Arnold Sighting, June 24, 1947<\/a> [61 Pages, 11MB]<\/p>\n<div class=\"ead-preview\"><div class=\"ead-document\" style=\"position: relative;padding-top: 90%;\"><div class=\"ead-iframe-wrapper\"><iframe src=\"\/\/docs.google.com\/viewer?url=https%3A%2F%2Fdocuments2.theblackvault.com%2Fdocuments%2Fprojectbluebook%2Fkennetharnoldbluebook.pdf&amp;embedded=true&amp;hl=en\" title=\"Embedded Document\" class=\"ead-iframe\" style=\"width: 100%;height: 100%;border: none;position: absolute;left: 0;top: 0;visibility: hidden;\"><\/iframe><\/div>\t\t\t<div class=\"ead-document-loading\" style=\"width:100%;height:100%;position:absolute;left:0;top:0;z-index:10;\">\n\t\t\t\t<div class=\"ead-loading-wrap\">\n\t\t\t\t\t<div class=\"ead-loading-main\">\n\t\t\t\t\t\t<div class=\"ead-loading\">\n\t\t\t\t\t\t\t<img decoding=\"async\" src=\"https:\/\/www.theblackvault.com\/documentarchive\/wp-content\/plugins\/embed-any-document\/images\/loading.svg\" width=\"55\" height=\"55\" alt=\"Loader\">\n\t\t\t\t\t\t\t<span>Loading...<\/span>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t<div class=\"ead-loading-foot\">\n\t\t\t\t\t\t<div class=\"ead-loading-foot-title\">\n\t\t\t\t\t\t\t<img decoding=\"async\" src=\"https:\/\/www.theblackvault.com\/documentarchive\/wp-content\/plugins\/embed-any-document\/images\/EAD-logo.svg\" alt=\"EAD Logo\" width=\"36\" height=\"23\"\/>\n\t\t\t\t\t\t\t<span>Taking too long?<\/span>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<p>\n\t\t\t\t\t\t\t<div class=\"ead-document-btn ead-reload-btn\" role=\"button\">\n\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/www.theblackvault.com\/documentarchive\/wp-content\/plugins\/embed-any-document\/images\/reload.svg\" alt=\"Reload\" width=\"12\" height=\"12\"\/> Reload document\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t<span>|<\/span>\n\t\t\t\t\t\t\t<a href=\"https:\/\/documents2.theblackvault.com\/documents\/projectbluebook\/kennetharnoldbluebook.pdf\" class=\"ead-document-btn\" target=\"_blank\">\n\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/www.theblackvault.com\/documentarchive\/wp-content\/plugins\/embed-any-document\/images\/open.svg\" alt=\"Open\" width=\"12\" height=\"12\"\/> Open in new tab\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t<\/div>\n\t\t<\/div><p class=\"embed_download\"><a href=\"https:\/\/documents2.theblackvault.com\/documents\/projectbluebook\/kennetharnoldbluebook.pdf\" download>Download [11.17 MB] <\/a><\/p><\/div><p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Background The Kenneth Arnold UFO sighting occurred on June 24, 1947, when businessman Kenneth Arnold was flying his private plane near Mount Rainier in Washington State. According to his report, he observed nine unusual, high-speed objects flying in a &#8220;V&#8221; formation. Arnold described the objects as flat and somewhat disc-like or saucer-shaped, with a bright,<\/p>\n","protected":false},"author":1,"featured_media":10961,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"episode_type":"","audio_file":"","transcript_file":"","podmotor_file_id":"","podmotor_episode_id":"","cover_image":"","cover_image_id":"","duration":"","filesize":"","filesize_raw":"","date_recorded":"","explicit":"","block":"","_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_feature_clip_id":0,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_post_was_ever_published":false},"categories":[8,32],"tags":[1408,625,296],"class_list":["post-9319","post","type-post","status-publish","format-standard","has-post-thumbnail","category-the-fringe","category-ufo-phenomena","tag-kenneth-arnold","tag-project-blue-book","tag-ufo"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 4.9.8 - aioseo.com -->\n\t<meta name=\"description\" content=\"Background The Kenneth Arnold UFO sighting occurred on June 24, 1947, when businessman Kenneth Arnold was flying his private plane near Mount Rainier in Washington State. According to his report, he observed nine unusual, high-speed objects flying in a &quot;V&quot; formation. Arnold described the objects as flat and somewhat disc-like or saucer-shaped, with a bright,\" \/>\n\t<meta name=\"robots\" content=\"max-image-preview:large\" \/>\n\t<meta name=\"author\" content=\"John Greenewald\"\/>\n\t<link rel=\"canonical\" href=\"https:\/\/www.theblackvault.com\/documentarchive\/project-blue-book-the-kenneth-arnold-ufo-sighting-mt-rainier-washington-june-24-1947\/\" \/>\n\t<meta name=\"generator\" content=\"All in One SEO (AIOSEO) 4.9.8\" \/>\n\t\t<meta property=\"og:locale\" content=\"en_US\" \/>\n\t\t<meta property=\"og:site_name\" content=\"The Black Vault - Discover the Truth\" \/>\n\t\t<meta property=\"og:type\" content=\"article\" \/>\n\t\t<meta property=\"og:title\" content=\"Project Blue Book: The Kenneth Arnold UFO Sighting, Mt. Rainier, Washington, June 24, 1947 - The Black Vault\" \/>\n\t\t<meta property=\"og:description\" content=\"Background The Kenneth Arnold UFO sighting occurred on June 24, 1947, when businessman Kenneth Arnold was flying his private plane near Mount Rainier in Washington State. According to his report, he observed nine unusual, high-speed objects flying in a &quot;V&quot; formation. Arnold described the objects as flat and somewhat disc-like or saucer-shaped, with a bright,\" \/>\n\t\t<meta property=\"og:url\" content=\"https:\/\/www.theblackvault.com\/documentarchive\/project-blue-book-the-kenneth-arnold-ufo-sighting-mt-rainier-washington-june-24-1947\/\" \/>\n\t\t<meta property=\"og:image\" content=\"https:\/\/www.theblackvault.com\/documentarchive\/wp-content\/uploads\/2020\/03\/6-8-2020-11-31-19-AM.jpg\" \/>\n\t\t<meta property=\"og:image:secure_url\" content=\"https:\/\/www.theblackvault.com\/documentarchive\/wp-content\/uploads\/2020\/03\/6-8-2020-11-31-19-AM.jpg\" \/>\n\t\t<meta property=\"og:image:width\" content=\"1722\" \/>\n\t\t<meta property=\"og:image:height\" content=\"768\" \/>\n\t\t<meta property=\"article:published_time\" content=\"2020-03-09T21:41:56+00:00\" \/>\n\t\t<meta property=\"article:modified_time\" content=\"2023-05-15T22:54:51+00:00\" \/>\n\t\t<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n\t\t<meta name=\"twitter:title\" content=\"Project Blue Book: The Kenneth Arnold UFO Sighting, Mt. Rainier, Washington, June 24, 1947 - The Black Vault\" \/>\n\t\t<meta name=\"twitter:description\" content=\"Background The Kenneth Arnold UFO sighting occurred on June 24, 1947, when businessman Kenneth Arnold was flying his private plane near Mount Rainier in Washington State. According to his report, he observed nine unusual, high-speed objects flying in a &quot;V&quot; formation. Arnold described the objects as flat and somewhat disc-like or saucer-shaped, with a bright,\" \/>\n\t\t<meta name=\"twitter:image\" content=\"https:\/\/www.theblackvault.com\/documentarchive\/wp-content\/uploads\/2020\/03\/6-8-2020-11-31-19-AM.jpg\" \/>\n\t\t<script type=\"application\/ld+json\" class=\"aioseo-schema\">\n\t\t\t{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"BlogPosting\",\"@id\":\"https:\\\/\\\/www.theblackvault.com\\\/documentarchive\\\/project-blue-book-the-kenneth-arnold-ufo-sighting-mt-rainier-washington-june-24-1947\\\/#blogposting\",\"name\":\"Project Blue Book: The Kenneth Arnold UFO Sighting, Mt. Rainier, Washington, June 24, 1947 - The Black Vault\",\"headline\":\"Project Blue Book: The Kenneth Arnold UFO Sighting, Mt. Rainier, Washington, June 24, 1947\",\"author\":{\"@id\":\"https:\\\/\\\/www.theblackvault.com\\\/documentarchive\\\/author\\\/administrator\\\/#author\"},\"publisher\":{\"@id\":\"https:\\\/\\\/www.theblackvault.com\\\/documentarchive\\\/#organization\"},\"image\":{\"@type\":\"ImageObject\",\"url\":\"https:\\\/\\\/www.theblackvault.com\\\/documentarchive\\\/wp-content\\\/uploads\\\/2020\\\/03\\\/6-8-2020-11-31-19-AM.jpg\",\"width\":1722,\"height\":768},\"datePublished\":\"2020-03-09T21:41:56+00:00\",\"dateModified\":\"2023-05-15T22:54:51+00:00\",\"inLanguage\":\"en-US\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/www.theblackvault.com\\\/documentarchive\\\/project-blue-book-the-kenneth-arnold-ufo-sighting-mt-rainier-washington-june-24-1947\\\/#webpage\"},\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.theblackvault.com\\\/documentarchive\\\/project-blue-book-the-kenneth-arnold-ufo-sighting-mt-rainier-washington-june-24-1947\\\/#webpage\"},\"articleSection\":\"Mysteries, UFO Phenomena, kenneth arnold, project blue book, UFO\"},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\\\/\\\/www.theblackvault.com\\\/documentarchive\\\/project-blue-book-the-kenneth-arnold-ufo-sighting-mt-rainier-washington-june-24-1947\\\/#breadcrumblist\",\"itemListElement\":[{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/www.theblackvault.com\\\/documentarchive#listItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\\\/\\\/www.theblackvault.com\\\/documentarchive\",\"nextItem\":{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/www.theblackvault.com\\\/documentarchive\\\/category\\\/the-fringe\\\/#listItem\",\"name\":\"Mysteries\"}},{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/www.theblackvault.com\\\/documentarchive\\\/category\\\/the-fringe\\\/#listItem\",\"position\":2,\"name\":\"Mysteries\",\"item\":\"https:\\\/\\\/www.theblackvault.com\\\/documentarchive\\\/category\\\/the-fringe\\\/\",\"nextItem\":{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/www.theblackvault.com\\\/documentarchive\\\/category\\\/the-fringe\\\/ufo-phenomena\\\/#listItem\",\"name\":\"UFO Phenomena\"},\"previousItem\":{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/www.theblackvault.com\\\/documentarchive#listItem\",\"name\":\"Home\"}},{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/www.theblackvault.com\\\/documentarchive\\\/category\\\/the-fringe\\\/ufo-phenomena\\\/#listItem\",\"position\":3,\"name\":\"UFO Phenomena\",\"item\":\"https:\\\/\\\/www.theblackvault.com\\\/documentarchive\\\/category\\\/the-fringe\\\/ufo-phenomena\\\/\",\"nextItem\":{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/www.theblackvault.com\\\/documentarchive\\\/project-blue-book-the-kenneth-arnold-ufo-sighting-mt-rainier-washington-june-24-1947\\\/#listItem\",\"name\":\"Project Blue Book: The Kenneth Arnold UFO Sighting, Mt. Rainier, Washington, June 24, 1947\"},\"previousItem\":{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/www.theblackvault.com\\\/documentarchive\\\/category\\\/the-fringe\\\/#listItem\",\"name\":\"Mysteries\"}},{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/www.theblackvault.com\\\/documentarchive\\\/project-blue-book-the-kenneth-arnold-ufo-sighting-mt-rainier-washington-june-24-1947\\\/#listItem\",\"position\":4,\"name\":\"Project Blue Book: The Kenneth Arnold UFO Sighting, Mt. Rainier, Washington, June 24, 1947\",\"previousItem\":{\"@type\":\"ListItem\",\"@id\":\"https:\\\/\\\/www.theblackvault.com\\\/documentarchive\\\/category\\\/the-fringe\\\/ufo-phenomena\\\/#listItem\",\"name\":\"UFO Phenomena\"}}]},{\"@type\":\"Organization\",\"@id\":\"https:\\\/\\\/www.theblackvault.com\\\/documentarchive\\\/#organization\",\"name\":\"The Black Vault\",\"description\":\"Discover the Truth\",\"url\":\"https:\\\/\\\/www.theblackvault.com\\\/documentarchive\\\/\"},{\"@type\":\"Person\",\"@id\":\"https:\\\/\\\/www.theblackvault.com\\\/documentarchive\\\/author\\\/administrator\\\/#author\",\"url\":\"https:\\\/\\\/www.theblackvault.com\\\/documentarchive\\\/author\\\/administrator\\\/\",\"name\":\"John Greenewald\",\"image\":{\"@type\":\"ImageObject\",\"@id\":\"https:\\\/\\\/www.theblackvault.com\\\/documentarchive\\\/project-blue-book-the-kenneth-arnold-ufo-sighting-mt-rainier-washington-june-24-1947\\\/#authorImage\",\"url\":\"https:\\\/\\\/secure.gravatar.com\\\/avatar\\\/49e167a0fd63564e8d54fa9b2ee5f1c9c4e6808ec394e8da6d328f5733c76582?s=96&d=mm&r=g\",\"width\":96,\"height\":96,\"caption\":\"John Greenewald\"}},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/www.theblackvault.com\\\/documentarchive\\\/project-blue-book-the-kenneth-arnold-ufo-sighting-mt-rainier-washington-june-24-1947\\\/#webpage\",\"url\":\"https:\\\/\\\/www.theblackvault.com\\\/documentarchive\\\/project-blue-book-the-kenneth-arnold-ufo-sighting-mt-rainier-washington-june-24-1947\\\/\",\"name\":\"Project Blue Book: The Kenneth Arnold UFO Sighting, Mt. Rainier, Washington, June 24, 1947 - The Black Vault\",\"description\":\"Background The Kenneth Arnold UFO sighting occurred on June 24, 1947, when businessman Kenneth Arnold was flying his private plane near Mount Rainier in Washington State. According to his report, he observed nine unusual, high-speed objects flying in a \\\"V\\\" formation. Arnold described the objects as flat and somewhat disc-like or saucer-shaped, with a bright,\",\"inLanguage\":\"en-US\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.theblackvault.com\\\/documentarchive\\\/#website\"},\"breadcrumb\":{\"@id\":\"https:\\\/\\\/www.theblackvault.com\\\/documentarchive\\\/project-blue-book-the-kenneth-arnold-ufo-sighting-mt-rainier-washington-june-24-1947\\\/#breadcrumblist\"},\"author\":{\"@id\":\"https:\\\/\\\/www.theblackvault.com\\\/documentarchive\\\/author\\\/administrator\\\/#author\"},\"creator\":{\"@id\":\"https:\\\/\\\/www.theblackvault.com\\\/documentarchive\\\/author\\\/administrator\\\/#author\"},\"image\":{\"@type\":\"ImageObject\",\"url\":\"https:\\\/\\\/www.theblackvault.com\\\/documentarchive\\\/wp-content\\\/uploads\\\/2020\\\/03\\\/6-8-2020-11-31-19-AM.jpg\",\"@id\":\"https:\\\/\\\/www.theblackvault.com\\\/documentarchive\\\/project-blue-book-the-kenneth-arnold-ufo-sighting-mt-rainier-washington-june-24-1947\\\/#mainImage\",\"width\":1722,\"height\":768},\"primaryImageOfPage\":{\"@id\":\"https:\\\/\\\/www.theblackvault.com\\\/documentarchive\\\/project-blue-book-the-kenneth-arnold-ufo-sighting-mt-rainier-washington-june-24-1947\\\/#mainImage\"},\"datePublished\":\"2020-03-09T21:41:56+00:00\",\"dateModified\":\"2023-05-15T22:54:51+00:00\"},{\"@type\":\"WebSite\",\"@id\":\"https:\\\/\\\/www.theblackvault.com\\\/documentarchive\\\/#website\",\"url\":\"https:\\\/\\\/www.theblackvault.com\\\/documentarchive\\\/\",\"name\":\"The Black Vault\",\"description\":\"Discover the Truth\",\"inLanguage\":\"en-US\",\"publisher\":{\"@id\":\"https:\\\/\\\/www.theblackvault.com\\\/documentarchive\\\/#organization\"}}]}\n\t\t<\/script>\n\t\t<!-- All in One SEO -->\n\n","aioseo_head_json":{"title":"Project Blue Book: The Kenneth Arnold UFO Sighting, Mt. Rainier, Washington, June 24, 1947 - The Black Vault","description":"Background The Kenneth Arnold UFO sighting occurred on June 24, 1947, when businessman Kenneth Arnold was flying his private plane near Mount Rainier in Washington State. According to his report, he observed nine unusual, high-speed objects flying in a \"V\" formation. Arnold described the objects as flat and somewhat disc-like or saucer-shaped, with a bright,","canonical_url":"https:\/\/www.theblackvault.com\/documentarchive\/project-blue-book-the-kenneth-arnold-ufo-sighting-mt-rainier-washington-june-24-1947\/","robots":"max-image-preview:large","keywords":"","webmasterTools":{"miscellaneous":""},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"BlogPosting","@id":"https:\/\/www.theblackvault.com\/documentarchive\/project-blue-book-the-kenneth-arnold-ufo-sighting-mt-rainier-washington-june-24-1947\/#blogposting","name":"Project Blue Book: The Kenneth Arnold UFO Sighting, Mt. Rainier, Washington, June 24, 1947 - The Black Vault","headline":"Project Blue Book: The Kenneth Arnold UFO Sighting, Mt. Rainier, Washington, June 24, 1947","author":{"@id":"https:\/\/www.theblackvault.com\/documentarchive\/author\/administrator\/#author"},"publisher":{"@id":"https:\/\/www.theblackvault.com\/documentarchive\/#organization"},"image":{"@type":"ImageObject","url":"https:\/\/www.theblackvault.com\/documentarchive\/wp-content\/uploads\/2020\/03\/6-8-2020-11-31-19-AM.jpg","width":1722,"height":768},"datePublished":"2020-03-09T21:41:56+00:00","dateModified":"2023-05-15T22:54:51+00:00","inLanguage":"en-US","mainEntityOfPage":{"@id":"https:\/\/www.theblackvault.com\/documentarchive\/project-blue-book-the-kenneth-arnold-ufo-sighting-mt-rainier-washington-june-24-1947\/#webpage"},"isPartOf":{"@id":"https:\/\/www.theblackvault.com\/documentarchive\/project-blue-book-the-kenneth-arnold-ufo-sighting-mt-rainier-washington-june-24-1947\/#webpage"},"articleSection":"Mysteries, UFO Phenomena, kenneth arnold, project blue book, UFO"},{"@type":"BreadcrumbList","@id":"https:\/\/www.theblackvault.com\/documentarchive\/project-blue-book-the-kenneth-arnold-ufo-sighting-mt-rainier-washington-june-24-1947\/#breadcrumblist","itemListElement":[{"@type":"ListItem","@id":"https:\/\/www.theblackvault.com\/documentarchive#listItem","position":1,"name":"Home","item":"https:\/\/www.theblackvault.com\/documentarchive","nextItem":{"@type":"ListItem","@id":"https:\/\/www.theblackvault.com\/documentarchive\/category\/the-fringe\/#listItem","name":"Mysteries"}},{"@type":"ListItem","@id":"https:\/\/www.theblackvault.com\/documentarchive\/category\/the-fringe\/#listItem","position":2,"name":"Mysteries","item":"https:\/\/www.theblackvault.com\/documentarchive\/category\/the-fringe\/","nextItem":{"@type":"ListItem","@id":"https:\/\/www.theblackvault.com\/documentarchive\/category\/the-fringe\/ufo-phenomena\/#listItem","name":"UFO Phenomena"},"previousItem":{"@type":"ListItem","@id":"https:\/\/www.theblackvault.com\/documentarchive#listItem","name":"Home"}},{"@type":"ListItem","@id":"https:\/\/www.theblackvault.com\/documentarchive\/category\/the-fringe\/ufo-phenomena\/#listItem","position":3,"name":"UFO Phenomena","item":"https:\/\/www.theblackvault.com\/documentarchive\/category\/the-fringe\/ufo-phenomena\/","nextItem":{"@type":"ListItem","@id":"https:\/\/www.theblackvault.com\/documentarchive\/project-blue-book-the-kenneth-arnold-ufo-sighting-mt-rainier-washington-june-24-1947\/#listItem","name":"Project Blue Book: The Kenneth Arnold UFO Sighting, Mt. Rainier, Washington, June 24, 1947"},"previousItem":{"@type":"ListItem","@id":"https:\/\/www.theblackvault.com\/documentarchive\/category\/the-fringe\/#listItem","name":"Mysteries"}},{"@type":"ListItem","@id":"https:\/\/www.theblackvault.com\/documentarchive\/project-blue-book-the-kenneth-arnold-ufo-sighting-mt-rainier-washington-june-24-1947\/#listItem","position":4,"name":"Project Blue Book: The Kenneth Arnold UFO Sighting, Mt. Rainier, Washington, June 24, 1947","previousItem":{"@type":"ListItem","@id":"https:\/\/www.theblackvault.com\/documentarchive\/category\/the-fringe\/ufo-phenomena\/#listItem","name":"UFO Phenomena"}}]},{"@type":"Organization","@id":"https:\/\/www.theblackvault.com\/documentarchive\/#organization","name":"The Black Vault","description":"Discover the Truth","url":"https:\/\/www.theblackvault.com\/documentarchive\/"},{"@type":"Person","@id":"https:\/\/www.theblackvault.com\/documentarchive\/author\/administrator\/#author","url":"https:\/\/www.theblackvault.com\/documentarchive\/author\/administrator\/","name":"John Greenewald","image":{"@type":"ImageObject","@id":"https:\/\/www.theblackvault.com\/documentarchive\/project-blue-book-the-kenneth-arnold-ufo-sighting-mt-rainier-washington-june-24-1947\/#authorImage","url":"https:\/\/secure.gravatar.com\/avatar\/49e167a0fd63564e8d54fa9b2ee5f1c9c4e6808ec394e8da6d328f5733c76582?s=96&d=mm&r=g","width":96,"height":96,"caption":"John Greenewald"}},{"@type":"WebPage","@id":"https:\/\/www.theblackvault.com\/documentarchive\/project-blue-book-the-kenneth-arnold-ufo-sighting-mt-rainier-washington-june-24-1947\/#webpage","url":"https:\/\/www.theblackvault.com\/documentarchive\/project-blue-book-the-kenneth-arnold-ufo-sighting-mt-rainier-washington-june-24-1947\/","name":"Project Blue Book: The Kenneth Arnold UFO Sighting, Mt. Rainier, Washington, June 24, 1947 - The Black Vault","description":"Background The Kenneth Arnold UFO sighting occurred on June 24, 1947, when businessman Kenneth Arnold was flying his private plane near Mount Rainier in Washington State. According to his report, he observed nine unusual, high-speed objects flying in a \"V\" formation. Arnold described the objects as flat and somewhat disc-like or saucer-shaped, with a bright,","inLanguage":"en-US","isPartOf":{"@id":"https:\/\/www.theblackvault.com\/documentarchive\/#website"},"breadcrumb":{"@id":"https:\/\/www.theblackvault.com\/documentarchive\/project-blue-book-the-kenneth-arnold-ufo-sighting-mt-rainier-washington-june-24-1947\/#breadcrumblist"},"author":{"@id":"https:\/\/www.theblackvault.com\/documentarchive\/author\/administrator\/#author"},"creator":{"@id":"https:\/\/www.theblackvault.com\/documentarchive\/author\/administrator\/#author"},"image":{"@type":"ImageObject","url":"https:\/\/www.theblackvault.com\/documentarchive\/wp-content\/uploads\/2020\/03\/6-8-2020-11-31-19-AM.jpg","@id":"https:\/\/www.theblackvault.com\/documentarchive\/project-blue-book-the-kenneth-arnold-ufo-sighting-mt-rainier-washington-june-24-1947\/#mainImage","width":1722,"height":768},"primaryImageOfPage":{"@id":"https:\/\/www.theblackvault.com\/documentarchive\/project-blue-book-the-kenneth-arnold-ufo-sighting-mt-rainier-washington-june-24-1947\/#mainImage"},"datePublished":"2020-03-09T21:41:56+00:00","dateModified":"2023-05-15T22:54:51+00:00"},{"@type":"WebSite","@id":"https:\/\/www.theblackvault.com\/documentarchive\/#website","url":"https:\/\/www.theblackvault.com\/documentarchive\/","name":"The Black Vault","description":"Discover the Truth","inLanguage":"en-US","publisher":{"@id":"https:\/\/www.theblackvault.com\/documentarchive\/#organization"}}]},"og:locale":"en_US","og:site_name":"The Black Vault - Discover the Truth","og:type":"article","og:title":"Project Blue Book: The Kenneth Arnold UFO Sighting, Mt. Rainier, Washington, June 24, 1947 - The Black Vault","og:description":"Background The Kenneth Arnold UFO sighting occurred on June 24, 1947, when businessman Kenneth Arnold was flying his private plane near Mount Rainier in Washington State. According to his report, he observed nine unusual, high-speed objects flying in a &quot;V&quot; formation. Arnold described the objects as flat and somewhat disc-like or saucer-shaped, with a bright,","og:url":"https:\/\/www.theblackvault.com\/documentarchive\/project-blue-book-the-kenneth-arnold-ufo-sighting-mt-rainier-washington-june-24-1947\/","og:image":"https:\/\/www.theblackvault.com\/documentarchive\/wp-content\/uploads\/2020\/03\/6-8-2020-11-31-19-AM.jpg","og:image:secure_url":"https:\/\/www.theblackvault.com\/documentarchive\/wp-content\/uploads\/2020\/03\/6-8-2020-11-31-19-AM.jpg","og:image:width":1722,"og:image:height":768,"article:published_time":"2020-03-09T21:41:56+00:00","article:modified_time":"2023-05-15T22:54:51+00:00","twitter:card":"summary_large_image","twitter:title":"Project Blue Book: The Kenneth Arnold UFO Sighting, Mt. Rainier, Washington, June 24, 1947 - The Black Vault","twitter:description":"Background The Kenneth Arnold UFO sighting occurred on June 24, 1947, when businessman Kenneth Arnold was flying his private plane near Mount Rainier in Washington State. According to his report, he observed nine unusual, high-speed objects flying in a &quot;V&quot; formation. Arnold described the objects as flat and somewhat disc-like or saucer-shaped, with a bright,","twitter:image":"https:\/\/www.theblackvault.com\/documentarchive\/wp-content\/uploads\/2020\/03\/6-8-2020-11-31-19-AM.jpg"},"aioseo_meta_data":{"post_id":"9319","title":null,"description":null,"keywords":[],"keyphrases":{"focus":{"keyphrase":"","score":0,"analysis":{"keyphraseInTitle":{"score":0,"maxScore":9,"error":1}}},"additional":[]},"primary_term":null,"canonical_url":null,"og_title":null,"og_description":null,"og_object_type":"default","og_image_type":"default","og_image_url":null,"og_image_width":null,"og_image_height":null,"og_image_custom_url":null,"og_image_custom_fields":null,"og_video":"","og_custom_url":null,"og_article_section":null,"og_article_tags":[],"twitter_use_og":false,"twitter_card":"default","twitter_image_type":"default","twitter_image_url":null,"twitter_image_custom_url":null,"twitter_image_custom_fields":null,"twitter_title":null,"twitter_description":null,"schema":{"blockGraphs":[],"customGraphs":[],"default":{"data":{"Article":[],"Course":[],"Dataset":[],"FAQPage":[],"Movie":[],"Person":[],"Product":[],"ProductReview":[],"Car":[],"Recipe":[],"Service":[],"SoftwareApplication":[],"WebPage":[]},"graphName":"","isEnabled":true},"graphs":[]},"schema_type":"default","schema_type_options":null,"pillar_content":false,"robots_default":true,"robots_noindex":false,"robots_noarchive":false,"robots_nosnippet":false,"robots_nofollow":false,"robots_noimageindex":false,"robots_noodp":false,"robots_notranslate":false,"robots_max_snippet":"-1","robots_max_videopreview":"-1","robots_max_imagepreview":"large","priority":null,"frequency":"default","local_seo":null,"breadcrumb_settings":null,"limit_modified_date":false,"ai":null,"created":"2023-04-05 20:44:34","updated":"2025-06-18 23:14:56","seo_analyzer_scan_date":null},"aioseo_breadcrumb":"<div class=\"aioseo-breadcrumbs\"><span class=\"aioseo-breadcrumb\">\n\t\t\t<a href=\"https:\/\/www.theblackvault.com\/documentarchive\" title=\"Home\">Home<\/a>\n\t\t<\/span><span class=\"aioseo-breadcrumb-separator\">&raquo;<\/span><span class=\"aioseo-breadcrumb\">\n\t\t\t<a href=\"https:\/\/www.theblackvault.com\/documentarchive\/category\/the-fringe\/\" title=\"Mysteries\">Mysteries<\/a>\n\t\t<\/span><span class=\"aioseo-breadcrumb-separator\">&raquo;<\/span><span class=\"aioseo-breadcrumb\">\n\t\t\t<a href=\"https:\/\/www.theblackvault.com\/documentarchive\/category\/the-fringe\/ufo-phenomena\/\" title=\"UFO Phenomena\">UFO Phenomena<\/a>\n\t\t<\/span><span class=\"aioseo-breadcrumb-separator\">&raquo;<\/span><span class=\"aioseo-breadcrumb\">\n\t\t\tProject Blue Book: The Kenneth Arnold UFO Sighting, Mt. Rainier, Washington, June 24, 1947\n\t\t<\/span><\/div>","aioseo_breadcrumb_json":[{"label":"Home","link":"https:\/\/www.theblackvault.com\/documentarchive"},{"label":"Mysteries","link":"https:\/\/www.theblackvault.com\/documentarchive\/category\/the-fringe\/"},{"label":"UFO Phenomena","link":"https:\/\/www.theblackvault.com\/documentarchive\/category\/the-fringe\/ufo-phenomena\/"},{"label":"Project Blue Book: The Kenneth Arnold UFO Sighting, Mt. Rainier, Washington, June 24, 1947","link":"https:\/\/www.theblackvault.com\/documentarchive\/project-blue-book-the-kenneth-arnold-ufo-sighting-mt-rainier-washington-june-24-1947\/"}],"jetpack_featured_media_url":"https:\/\/www.theblackvault.com\/documentarchive\/wp-content\/uploads\/2020\/03\/6-8-2020-11-31-19-AM.jpg","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/www.theblackvault.com\/documentarchive\/wp-json\/wp\/v2\/posts\/9319","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.theblackvault.com\/documentarchive\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.theblackvault.com\/documentarchive\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.theblackvault.com\/documentarchive\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.theblackvault.com\/documentarchive\/wp-json\/wp\/v2\/comments?post=9319"}],"version-history":[{"count":2,"href":"https:\/\/www.theblackvault.com\/documentarchive\/wp-json\/wp\/v2\/posts\/9319\/revisions"}],"predecessor-version":[{"id":17807,"href":"https:\/\/www.theblackvault.com\/documentarchive\/wp-json\/wp\/v2\/posts\/9319\/revisions\/17807"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.theblackvault.com\/documentarchive\/wp-json\/wp\/v2\/media\/10961"}],"wp:attachment":[{"href":"https:\/\/www.theblackvault.com\/documentarchive\/wp-json\/wp\/v2\/media?parent=9319"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.theblackvault.com\/documentarchive\/wp-json\/wp\/v2\/categories?post=9319"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.theblackvault.com\/documentarchive\/wp-json\/wp\/v2\/tags?post=9319"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}