{"id":35124,"date":"2020-10-01T07:58:27","date_gmt":"2020-10-01T07:58:27","guid":{"rendered":"https:\/\/blogs.agu.org\/landslideblog\/?p=35124"},"modified":"2020-10-01T07:58:27","modified_gmt":"2020-10-01T07:58:27","slug":"shillong-liquefaction","status":"publish","type":"post","link":"https:\/\/blogs.agu.org\/landslideblog\/2020\/10\/01\/shillong-liquefaction\/","title":{"rendered":"An interesting video showing large-scale liquefaction in a landslide"},"content":{"rendered":"<h4>An interesting video showing large-scale liquefaction in a landslide<\/h4>\n<p>The end of the summer monsoon in South Asia had a significant bite this year, with a spate of landslides in both <a href=\"https:\/\/thenortheasttoday.com\/landslides-cause-catastrophic-damage-and-loss-of-life-in-shillong\/\">northern India<\/a> and <a href=\"https:\/\/www.ndtv.com\/world-news\/nepal-landslides-kill-12-9-missing-2300686\">Nepal<\/a> in late September.\u00a0 These proved costly once more.\u00a0 I have yet to fully analyse the impact of landslides in Nepal in the 2020 summer monsoon, that will be for a future post, but there is little doubt that it will prove to have had the highest number of fatal, rainfall-induced landslides on record.<\/p>\n<p>An interesting video has been published on Youtube, showing a slope failure that apparently occurred in Shillong.\u00a0 I cannot find any detail about this landslide, and so cannot confirm the location or the date, but the video is interesting and informative.\u00a0 <a href=\"https:\/\/www.youtube.com\/watch?v=ef_gLtqfCsA\">This is the video<\/a>:-<\/p>\n<iframe loading=\"lazy\" title=\"Landslide in Shillong meghalaya\" width=\"800\" height=\"450\" src=\"https:\/\/www.youtube.com\/embed\/ef_gLtqfCsA?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture\" allowfullscreen><\/iframe>\n<p>.<\/p>\n<p>This starts off as a reasonably large shallow translational slip on a quite steep slope.\u00a0 The inference is that prior to failure this material had a reasonably high shear strength, enough to maintain that steep slope angle:-<\/p>\n<div id=\"attachment_35129\" style=\"width: 809px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-35129\" class=\" wp-image-35129\" src=\"https:\/\/blogs.agu.org\/landslideblog\/files\/2020\/10\/20_10-Shillong-1.jpg\" alt=\"Liquefaction in a landslide in Shillong\" width=\"799\" height=\"394\" srcset=\"https:\/\/blogs.agu.org\/landslideblog\/files\/2020\/10\/20_10-Shillong-1.jpg 2341w, https:\/\/blogs.agu.org\/landslideblog\/files\/2020\/10\/20_10-Shillong-1-300x148.jpg 300w, https:\/\/blogs.agu.org\/landslideblog\/files\/2020\/10\/20_10-Shillong-1-1024x505.jpg 1024w, https:\/\/blogs.agu.org\/landslideblog\/files\/2020\/10\/20_10-Shillong-1-768x379.jpg 768w, https:\/\/blogs.agu.org\/landslideblog\/files\/2020\/10\/20_10-Shillong-1-1536x757.jpg 1536w, https:\/\/blogs.agu.org\/landslideblog\/files\/2020\/10\/20_10-Shillong-1-2048x1010.jpg 2048w\" sizes=\"auto, (max-width: 799px) 100vw, 799px\" \/><p id=\"caption-attachment-35129\" class=\"wp-caption-text\">Liquefaction in a landslide in Shillong. <a href=\"https:\/\/www.youtube.com\/watch?v=ef_gLtqfCsA\">Still from a video posted to Youtube<\/a>.<\/p><\/div>\n<p>.<\/p>\n<p>A second or so later the slip reaches the building at the toe of the slope.\u00a0 By the point it has gone through <a href=\"https:\/\/blogs.agu.org\/landslideblog\/?s=liquefaction&amp;submit.x=0&amp;submit.y=0&amp;mswhere=blog\">liquefaction<\/a> and is now behaving as a fluid:-<\/p>\n<div id=\"attachment_35131\" style=\"width: 808px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-35131\" class=\" wp-image-35131\" src=\"https:\/\/blogs.agu.org\/landslideblog\/files\/2020\/10\/20_10-Shillong-2.jpg\" alt=\"Liquefaction in a landslide in Shillong. \" width=\"798\" height=\"397\" srcset=\"https:\/\/blogs.agu.org\/landslideblog\/files\/2020\/10\/20_10-Shillong-2.jpg 2341w, https:\/\/blogs.agu.org\/landslideblog\/files\/2020\/10\/20_10-Shillong-2-300x149.jpg 300w, https:\/\/blogs.agu.org\/landslideblog\/files\/2020\/10\/20_10-Shillong-2-1024x510.jpg 1024w, https:\/\/blogs.agu.org\/landslideblog\/files\/2020\/10\/20_10-Shillong-2-768x382.jpg 768w, https:\/\/blogs.agu.org\/landslideblog\/files\/2020\/10\/20_10-Shillong-2-1536x764.jpg 1536w, https:\/\/blogs.agu.org\/landslideblog\/files\/2020\/10\/20_10-Shillong-2-2048x1019.jpg 2048w\" sizes=\"auto, (max-width: 798px) 100vw, 798px\" \/><p id=\"caption-attachment-35131\" class=\"wp-caption-text\">Liquefaction in a landslide in Shillong. <a href=\"https:\/\/www.youtube.com\/watch?v=ef_gLtqfCsA\">Still from a video posted to Youtube<\/a>.<\/p><\/div>\n<p>.<\/p>\n<p>Indeed the portion of the landslide deposit closest to the camera literally flows away, but of course this may have entrained additional water from within the channel.<\/p>\n<p>This is a very stark illustration of the destructive power of even moderately-sized slips.\u00a0 It is fortunate that the building was robust &#8211; one can imagine the impacts on a flimsy structure &#8211; although it is likely that the people living at that end of the building were significantly impacted.<\/p>\n<p>As always the key take home message is to prevent the slope from failing in the first place.<\/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>An interesting video showing large-scale liquefaction in a landslide, reportedly in Shillong, northern India.<!-- 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":35129,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[29],"tags":[469,5,963,168,979,72],"class_list":["post-35124","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-landslide-video","tag-featured","tag-india","tag-landslide-video","tag-liquesfaction","tag-monsoon","tag-south-asia"],"_links":{"self":[{"href":"https:\/\/blogs.agu.org\/landslideblog\/wp-json\/wp\/v2\/posts\/35124","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=35124"}],"version-history":[{"count":0,"href":"https:\/\/blogs.agu.org\/landslideblog\/wp-json\/wp\/v2\/posts\/35124\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/blogs.agu.org\/landslideblog\/wp-json\/wp\/v2\/media\/35129"}],"wp:attachment":[{"href":"https:\/\/blogs.agu.org\/landslideblog\/wp-json\/wp\/v2\/media?parent=35124"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blogs.agu.org\/landslideblog\/wp-json\/wp\/v2\/categories?post=35124"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blogs.agu.org\/landslideblog\/wp-json\/wp\/v2\/tags?post=35124"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}