{"id":18371,"date":"2016-04-19T07:24:32","date_gmt":"2016-04-19T07:24:32","guid":{"rendered":"http:\/\/blogs.agu.org\/landslideblog\/?p=18371"},"modified":"2016-04-19T07:24:32","modified_gmt":"2016-04-19T07:24:32","slug":"drone-footage-of-the-kumamoto-earthquake-landslides","status":"publish","type":"post","link":"https:\/\/blogs.agu.org\/landslideblog\/2016\/04\/19\/drone-footage-of-the-kumamoto-earthquake-landslides\/","title":{"rendered":"Drone footage of the Kumamoto earthquake landslides"},"content":{"rendered":"<h5>Drone footage of the Kumamoto earthquake landslides<\/h5>\n<p>Kenichi Handa from the National Building Research Organization (NBRO) in Sri Lanka, to which he has been seconded by the Ministry of Land, Infrastructure, Transport and Tourism in Japan, <a href=\"https:\/\/blogs.agu.org\/members\/kenichihanda\/\">added a comment<\/a> to <a href=\"https:\/\/blogs.agu.org\/landslideblog\/2016\/04\/18\/kumamoto-earthquake-1\/\">my post yesterday <\/a>about the Kumamoto earthquake with some very useful links to images and videos of the landslides triggered by the quake.\u00a0 Particularly impressive is a set of drone footage videos collected by the <a href=\"http:\/\/www.gsi.go.jp\/BOUSAI\/H27-kumamoto-earthquake-index.html#aa\">Geographical Survey Institute<\/a>, which provide clarity about the landslides.\u00a0 One of the films features the very large landslide at Mimami-Aso:<\/p>\n<p><iframe loading=\"lazy\" src=\"https:\/\/www.youtube.com\/embed\/C52Niq2jNdI?rel=0\" width=\"640\" height=\"360\" frameborder=\"0\" allowfullscreen=\"allowfullscreen\"><\/iframe><\/p>\n<p>The footage shows that the\u00a0 upper portion of the landslide is very steep, with a planar mid section:<\/p>\n<div id=\"attachment_18374\" style=\"width: 650px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-18374\" class=\"wp-image-18374 size-full\" src=\"https:\/\/blogs.agu.org\/landslideblog\/files\/2016\/04\/Kumamoto-9-e1461047880588.jpg\" alt=\"Kumamoto Earthquake landslides\" width=\"640\" height=\"523\" \/><p id=\"caption-attachment-18374\" class=\"wp-caption-text\">The upper portion of the landslide at Mimami-Aso, triggered by the Kumamoto Earthquake, via <a href=\"https:\/\/www.youtube.com\/watch?v=C52Niq2jNdI\">Youtube<\/a><\/p><\/div>\n<p>&nbsp;<\/p>\n<p>Whilst the lower part of the slide plane is stepped:<\/p>\n<div id=\"attachment_18373\" style=\"width: 650px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-18373\" class=\"wp-image-18373 size-full\" src=\"https:\/\/blogs.agu.org\/landslideblog\/files\/2016\/04\/Kumamoto-8-e1461047571512.jpg\" alt=\"Kumamoto earthquake landslides\" width=\"640\" height=\"386\" \/><p id=\"caption-attachment-18373\" class=\"wp-caption-text\">Drone footage of the landslide at Mimami-Aso, triggered by the Kumamoto earthquake, via <a href=\"https:\/\/www.youtube.com\/watch?v=C52Niq2jNdI\">Youtube<\/a><\/p><\/div>\n<p>.<\/p>\n<p>The video also confirms that the landslide has not blocked the river.<\/p>\n<p>Perhaps more interesting is drone footage of the massive flowslide that I featured yesterday:<\/p>\n<p><iframe loading=\"lazy\" src=\"https:\/\/www.youtube.com\/embed\/obqBnLNur0I?rel=0\" width=\"640\" height=\"360\" frameborder=\"0\" allowfullscreen=\"allowfullscreen\"><\/iframe><\/p>\n<p>.<\/p>\n<p>To me this would seem to be the most interesting landslide of all.\u00a0 The video suggests that the landslide might have had multiple source zones on steep forested slopes, including these two:<\/p>\n<div id=\"attachment_18378\" style=\"width: 650px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-18378\" class=\"wp-image-18378 size-full\" src=\"https:\/\/blogs.agu.org\/landslideblog\/files\/2016\/04\/Kumamoto-10-e1461048308857.jpg\" alt=\"Kumamoto earthquake landslides\" width=\"640\" height=\"561\" \/><p id=\"caption-attachment-18378\" class=\"wp-caption-text\">Two of the source zone landslides for the flowslide triggered by the Kumamoto Earthquake, via Youtube<\/p><\/div>\n<p>.<\/p>\n<p>However, the drone footage hints there are further source zone landslides upstream, such as in the top right of this image:<\/p>\n<div id=\"attachment_18381\" style=\"width: 590px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-18381\" class=\"size-full wp-image-18381\" src=\"https:\/\/blogs.agu.org\/landslideblog\/files\/2016\/04\/Kumamoto-11.jpg\" alt=\"Kumamoto Earthquake\" width=\"580\" height=\"468\" srcset=\"https:\/\/blogs.agu.org\/landslideblog\/files\/2016\/04\/Kumamoto-11.jpg 580w, https:\/\/blogs.agu.org\/landslideblog\/files\/2016\/04\/Kumamoto-11-300x242.jpg 300w\" sizes=\"auto, (max-width: 580px) 100vw, 580px\" \/><p id=\"caption-attachment-18381\" class=\"wp-caption-text\">The source of the flowslide triggered by the Kumamoto Earthquake, via <a href=\"https:\/\/www.youtube.com\/watch?v=obqBnLNur0I&amp;feature=youtu.be\">Youtube<\/a><\/p><\/div>\n<p>.<\/p>\n<p>This is clarified by an extraordinary photograph from the <a href=\"http:\/\/www.ajiko.co.jp\/article\/detail\/ID56EDF7EZH\/\">Ajiko website<\/a>:<\/p>\n<div id=\"attachment_18390\" style=\"width: 650px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-18390\" class=\"size-full wp-image-18390\" src=\"https:\/\/blogs.agu.org\/landslideblog\/files\/2016\/04\/Kumamoto-14-e1461050072644.jpg\" alt=\"Kumamoto earthquake landslides\" width=\"640\" height=\"960\" \/><p id=\"caption-attachment-18390\" class=\"wp-caption-text\">The source zone of the flowslide triggered by the Kumamoto Earthquake, via <a href=\"http:\/\/www.ajiko.co.jp\/saigai\/kumamoto2016_04\/MGL9948t.jpg\">Ajiko<\/a><\/p><\/div>\n<p>&nbsp;<\/p>\n<p>Thus, there appears to be a highly concentrated set of shallow translational landslides in the upper part of the catchment.\u00a0 I would suspect that this must be a case of dynamic liquefaction leading to a highly mobile flow.\u00a0 It has probably the most beautiful runout pattern of any of the Kumamoto Earthquake landslides:<\/p>\n<div id=\"attachment_18382\" style=\"width: 650px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-18382\" class=\"size-full wp-image-18382\" src=\"https:\/\/blogs.agu.org\/landslideblog\/files\/2016\/04\/Kumamoto-12-e1461048794681.jpg\" alt=\"Kumamoto Earthquake landslides\" width=\"640\" height=\"454\" \/><p id=\"caption-attachment-18382\" class=\"wp-caption-text\">The runout pattern of the flowslide, the most mobile of the Kumamoto Earthquake landslides, via <a href=\"https:\/\/www.youtube.com\/watch?v=obqBnLNur0I&amp;feature=youtu.be\">Youtube<\/a><\/p><\/div>\n<p>.<\/p>\n<p>The location of this landslide can be found on the GSI online <a href=\"http:\/\/maps.gsi.go.jp\/#15\/32.862584\/131.023679\/&amp;base=std&amp;ls=std|20160414kumamoto_0416uav&amp;disp=11&amp;lcd=20160414kumamoto_0416uav&amp;vs=c1j0l0u0f0&amp;d=vl\">GIS platform<\/a>.\u00a0 This is the site on Google Earth, I think:<\/p>\n<div id=\"attachment_18383\" style=\"width: 650px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-18383\" class=\"size-full wp-image-18383\" src=\"https:\/\/blogs.agu.org\/landslideblog\/files\/2016\/04\/Kumamoto-13-e1461049323282.jpg\" alt=\"Kumamoto earthquake landslides\" width=\"640\" height=\"501\" \/><p id=\"caption-attachment-18383\" class=\"wp-caption-text\">Google Earth imagery of the flowslide triggered by the Kumamoto Earthquake. In the background is Mount Aso<\/p><\/div>\n<p>.<\/p>\n<p>This suggests that the landslide has occurred on the flanks of <a href=\"https:\/\/en.wikipedia.org\/wiki\/Mount_Aso\">Mount Aso<\/a>, the largest active volcano in Japan.\u00a0 I suspect therefore that this might have been a flow of volcanic ash, so technically may be a lahar.<\/p>\n<p>It is increasingly clear that the Kumamoto Earthquake landslides are remarkable. More will follow in the next few days&#8230;<\/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>Drone footage and high quality images are now becoming available of the Kumamoto Earthquake landslides in Japan. In some cases the landslides appear to be remarkable.<!-- 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":18390,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[537],"tags":[23,881,469,14,361,1099,34,959],"class_list":["post-18371","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-earthquake-induced-landslide","tag-earthquake","tag-east-asia","tag-featured","tag-flowslide","tag-japan","tag-kumamoto","tag-lahar","tag-landslide-report"],"_links":{"self":[{"href":"https:\/\/blogs.agu.org\/landslideblog\/wp-json\/wp\/v2\/posts\/18371","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=18371"}],"version-history":[{"count":0,"href":"https:\/\/blogs.agu.org\/landslideblog\/wp-json\/wp\/v2\/posts\/18371\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/blogs.agu.org\/landslideblog\/wp-json\/wp\/v2\/media\/18390"}],"wp:attachment":[{"href":"https:\/\/blogs.agu.org\/landslideblog\/wp-json\/wp\/v2\/media?parent=18371"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blogs.agu.org\/landslideblog\/wp-json\/wp\/v2\/categories?post=18371"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blogs.agu.org\/landslideblog\/wp-json\/wp\/v2\/tags?post=18371"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}