{"id":43447,"date":"2023-04-20T06:05:36","date_gmt":"2023-04-20T06:05:36","guid":{"rendered":"https:\/\/blogs.agu.org\/landslideblog\/?p=43447"},"modified":"2023-04-20T06:05:36","modified_gmt":"2023-04-20T06:05:36","slug":"casamicciola-landslide-1","status":"publish","type":"post","link":"https:\/\/blogs.agu.org\/landslideblog\/2023\/04\/20\/casamicciola-landslide-1\/","title":{"rendered":"The 26 November 2022 Casamicciola landslide on the island of Ischia in Italy"},"content":{"rendered":"<h4>The 26 November 2022 Casamicciola landslide on the island of Ischia in Italy<\/h4>\n<p>On 26 Novmeber 2022, <a href=\"https:\/\/blogs.agu.org\/landslideblog\/2022\/11\/28\/casamicciola-1\/\">a substantial debris flow, now termed the Casamicciola landslide<\/a>, was triggered by heavy rainfall on the island of Ischia in Italy.\u00a0 This landslide, which killed 12 people and injured several more, has been described in an initial but rigorous analysis (<a href=\"https:\/\/link.springer.com\/article\/10.1007\/s10346-023-02064-0\">Romeo <em>et al.<\/em> 2023<\/a>) published in the journal <a href=\"https:\/\/link.springer.com\/journal\/10346\"><em>Landslides<\/em><\/a>.<\/p>\n<p>The analysis shows that the landslide had a volume of about 40,000 cubic metres, which is very large for a landslide through an urban area.\u00a0 There is excellent data on the landslide, including field mapping, remotely sensed data, high quality rainfall records from nearby and a seismic record that has captured the landslide movement.\u00a0 The authors have analysed 16 years of rainfall records, from 2006 to 2022.\u00a0 The rainfall event that triggered the landslide, was 176.8 mm in 24 hours, the highest total in the record.\u00a0 The second highest value, 111 mm in 24 hours in 2009, also triggered extensive landslides on Ischia.<\/p>\n<p>There is a very interesting <a href=\"https:\/\/www.youtube.com\/watch?v=ekM_WQ1VJjI\">drone video on Youtube that shows the track of the landslide<\/a>:-<\/p>\n<iframe loading=\"lazy\" title=\"ESCLUSIVO - Ecco i video che documentano dall&#039;alto la drammatica frana di Casamicciola 1\/5\" width=\"800\" height=\"450\" src=\"https:\/\/www.youtube.com\/embed\/ekM_WQ1VJjI?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" allowfullscreen><\/iframe>\n<p>.<\/p>\n<p>This video includes this still, which captures the track of the landslide through the upper part of the town:-<\/p>\n<div id=\"attachment_43450\" style=\"width: 809px\" class=\"wp-caption alignnone\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-43450\" class=\" wp-image-43450\" src=\"https:\/\/blogs.agu.org\/landslideblog\/files\/2023\/04\/22_04-Ischia-1.jpg\" alt=\"The track of the 26 November 2022 Casamicciola landslide on the island of Ischia in Italy.\" width=\"799\" height=\"415\" srcset=\"https:\/\/blogs.agu.org\/landslideblog\/files\/2023\/04\/22_04-Ischia-1.jpg 1258w, https:\/\/blogs.agu.org\/landslideblog\/files\/2023\/04\/22_04-Ischia-1-300x156.jpg 300w, https:\/\/blogs.agu.org\/landslideblog\/files\/2023\/04\/22_04-Ischia-1-1024x532.jpg 1024w, https:\/\/blogs.agu.org\/landslideblog\/files\/2023\/04\/22_04-Ischia-1-768x399.jpg 768w\" sizes=\"auto, (max-width: 799px) 100vw, 799px\" \/><p id=\"caption-attachment-43450\" class=\"wp-caption-text\"><em>The track of the 26 November 2022 Casamicciola landslide on the island of Ischia in Italy. <a href=\"https:\/\/www.youtube.com\/watch?v=ekM_WQ1VJjI\">Still from a drone video posted to Youtube.<\/a><\/em><\/p><\/div>\n<p>.<\/p>\n<p>The authors conclude that the failure occurred in saturated debris high on the slope, with contributions from rockfalls and smaller debris flows along the track,\u00a0 The landslide turned into a classic channelised debris flow.\u00a0 Unfortunately deposition did not start until Casamicciola had been reached, meaning that the buildings took the full force of the flow.\u00a0 The peak velocity was in the range of 20 metres per second.<\/p>\n<p>The timing of the landslide, which was one of several that occurred that day, may well have played a role in the loss of life.\u00a0 The landslide was triggered at about 5 am, when most people would have been asleep.\u00a0 Given the highly destructive nature of the landslide, there was little chance of escape.<\/p>\n<p>.<\/p>\n<h4>Reference<\/h4>\n<p>Romeo, S., D\u2019Angi\u00f2, D., Fraccica, A.\u00a0<i>et al.<\/i> 2023.\u00a0 <a href=\"https:\/\/link.springer.com\/article\/10.1007\/s10346-023-02064-0\">Investigation and preliminary assessment of the Casamicciola landslide in the island of Ischia (Italy) on November 26, 2022<\/a>. <i>Landslides<\/i>\u00a0https:\/\/doi.org\/10.1007\/s10346-023-02064-0<\/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 new paper in the journal Landslides describes the 26 November 2022 Casamicciola landslide on the island of Ischia in Italy, which killed 12 people<!-- 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":43450,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[28149,27975,57,144,469,36,17,788],"class_list":["post-43447","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-uncategorized","tag-channelised","tag-channelised-debris-flow","tag-debris-flow","tag-europe","tag-featured","tag-italy","tag-research","tag-review-of-a-paper-2"],"_links":{"self":[{"href":"https:\/\/blogs.agu.org\/landslideblog\/wp-json\/wp\/v2\/posts\/43447","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=43447"}],"version-history":[{"count":0,"href":"https:\/\/blogs.agu.org\/landslideblog\/wp-json\/wp\/v2\/posts\/43447\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/blogs.agu.org\/landslideblog\/wp-json\/wp\/v2\/media\/43450"}],"wp:attachment":[{"href":"https:\/\/blogs.agu.org\/landslideblog\/wp-json\/wp\/v2\/media?parent=43447"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blogs.agu.org\/landslideblog\/wp-json\/wp\/v2\/categories?post=43447"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blogs.agu.org\/landslideblog\/wp-json\/wp\/v2\/tags?post=43447"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}