{"id":38456,"date":"2021-08-04T06:52:25","date_gmt":"2021-08-04T06:52:25","guid":{"rendered":"https:\/\/blogs.agu.org\/landslideblog\/?p=38456"},"modified":"2021-08-04T06:52:25","modified_gmt":"2021-08-04T06:52:25","slug":"couloir-du-gypaete-1","status":"publish","type":"post","link":"https:\/\/blogs.agu.org\/landslideblog\/2021\/08\/04\/couloir-du-gypaete-1\/","title":{"rendered":"A rockfall video from the Couloir du Gypa\u00e8te in France"},"content":{"rendered":"<h4>A rockfall video from the Couloir du Gypa\u00e8te in France<\/h4>\n<p>With thanks to those who spotted this on Youtube, <a href=\"https:\/\/www.youtube.com\/watch?app=desktop&amp;v=jsXldaiIC5o&amp;feature=youtu.be\">a very surprising rockfall video was posted online<\/a> last week by R\u00e9mi Bourdelle, who was flying above the Couloir du Gypa\u00e8te in France when a rockfall developed.\u00a0 The video provides an utterly unique perspective on rockfall processes.\u00a0 Take a look:-<\/p>\n<iframe loading=\"lazy\" title=\"\u00c9boulement couloir du Gypa\u00e8te - Plaine-joux\" width=\"800\" height=\"450\" src=\"https:\/\/www.youtube.com\/embed\/jsXldaiIC5o?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture\" allowfullscreen><\/iframe>\n<p>.<\/p>\n<p>My first reaction to this is of course wow!\u00a0 The video shows boulders bouncing down the gulley and then through the trees below.\u00a0 <a href=\"https:\/\/blogs.agu.org\/landslideblog\/2021\/07\/26\/batseri-1\/\">As noted previously the force of these rocks is extraordinary<\/a>.<\/p>\n<p>But the most surprising element of this video is the trajectory of the rock seen at the start of the video.\u00a0 Fortunately, this boulder (which appears to have been fragmenting) left a trail of dust that marks its path through the air:<\/p>\n<div id=\"attachment_38459\" style=\"width: 809px\" class=\"wp-caption alignnone\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-38459\" class=\" wp-image-38459\" src=\"https:\/\/blogs.agu.org\/landslideblog\/files\/2021\/08\/21_08-french-rockfall-1.jpg\" alt=\"The trajectory of the boulder at Couloir du Gypa\u00e8te in France. \" width=\"799\" height=\"562\" srcset=\"https:\/\/blogs.agu.org\/landslideblog\/files\/2021\/08\/21_08-french-rockfall-1.jpg 961w, https:\/\/blogs.agu.org\/landslideblog\/files\/2021\/08\/21_08-french-rockfall-1-300x211.jpg 300w, https:\/\/blogs.agu.org\/landslideblog\/files\/2021\/08\/21_08-french-rockfall-1-768x540.jpg 768w\" sizes=\"auto, (max-width: 799px) 100vw, 799px\" \/><p id=\"caption-attachment-38459\" class=\"wp-caption-text\">The trajectory of the boulder at Couloir du Gypa\u00e8te in France. <a href=\"https:\/\/www.youtube.com\/watch?app=desktop&amp;v=jsXldaiIC5o&amp;feature=youtu.be\">Still from a Youtube video by R\u00e9mi Bourdelle<\/a>.<\/p><\/div>\n<p>.<\/p>\n<p>This is the sort of trajectory that is normally associated with fly rock from blasting rather than a rockfall.\u00a0 It is quite extraordinary; I have not seen this previously (have any readers?).<\/p>\n<p>Presumably, the boulder struck an inclined surface, whilst travelling at a very high velocity, causing a ricochet that created this ballistic trajectory.<\/p>\n<p>The other obviously possibility would be ejection during fracturing, but this seems less likely to me.<\/p>\n<p>I&#8217;m not sure if this is a freak, or something that is quite common.\u00a0 Any views?<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<!-- AddThis Advanced Settings generic via filter on the_content --><!-- AddThis Share Buttons generic via filter on the_content -->","protected":false},"excerpt":{"rendered":"<p>A rockfall video from the Couloir du Gypa\u00e8te in France, showing a very surprising trajectory of a rock block.<!-- AddThis Advanced Settings generic via filter on wp_trim_excerpt --><!-- AddThis Share Buttons generic via filter on wp_trim_excerpt --><\/p>\n","protected":false},"author":22,"featured_media":38459,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[29],"tags":[144,469,274,963,56],"class_list":["post-38456","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-landslide-video","tag-europe","tag-featured","tag-france","tag-landslide-video","tag-rockfall"],"_links":{"self":[{"href":"https:\/\/blogs.agu.org\/landslideblog\/wp-json\/wp\/v2\/posts\/38456","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/blogs.agu.org\/landslideblog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/blogs.agu.org\/landslideblog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/blogs.agu.org\/landslideblog\/wp-json\/wp\/v2\/users\/22"}],"replies":[{"embeddable":true,"href":"https:\/\/blogs.agu.org\/landslideblog\/wp-json\/wp\/v2\/comments?post=38456"}],"version-history":[{"count":0,"href":"https:\/\/blogs.agu.org\/landslideblog\/wp-json\/wp\/v2\/posts\/38456\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/blogs.agu.org\/landslideblog\/wp-json\/wp\/v2\/media\/38459"}],"wp:attachment":[{"href":"https:\/\/blogs.agu.org\/landslideblog\/wp-json\/wp\/v2\/media?parent=38456"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blogs.agu.org\/landslideblog\/wp-json\/wp\/v2\/categories?post=38456"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blogs.agu.org\/landslideblog\/wp-json\/wp\/v2\/tags?post=38456"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}