{"id":27492,"date":"2018-04-20T06:00:08","date_gmt":"2018-04-20T06:00:08","guid":{"rendered":"https:\/\/blogs.agu.org\/landslideblog\/?p=27492"},"modified":"2018-04-20T06:00:28","modified_gmt":"2018-04-20T06:00:28","slug":"castell-de-mur-2","status":"publish","type":"post","link":"https:\/\/blogs.agu.org\/landslideblog\/2018\/04\/20\/castell-de-mur-2\/","title":{"rendered":"Further information about the Castell de Mur landslide in Spain"},"content":{"rendered":"

Further information about the Castell de Mur landslide in Spain<\/h4>\n

Over the last couple of days more information has emerged about the Castell de Mur landslide in Spain<\/a>, which killed two people earlier this week.\u00a0 My friends at UPC<\/a>, Jordi Corominas<\/a> and Marcel Hurlimann<\/a> and colleagues have provided two drone images of the landslide, which I post here with their permission.\u00a0 This image shows the rear scarp of the landslide:<\/p>\n

\"Castell

The rear scarp of the Castell de Mur landslide in Spain. Image provided by colleagues at UPC<\/a> and used with permission.<\/p><\/div>\n

.<\/p>\n

Note that the face is weathered, indicating that detachment has occurred via a pre-existing surface.\u00a0 Lower down there are clear signs of fresh fractures.\u00a0 The UPC<\/a> interpretation, with which I agree, is that this is a toppling failure<\/a> primarily of an existing jointset, with fracture of rock generating the final landslide event.\u00a0 The image below shows the resultant landslide deposit:-<\/p>\n

\"Castell

The rockfall deposit the Castell de Mur landslide in Spain. Image provided by UPC and used with permission<\/p><\/div>\n

.<\/p>\n

Meanwhile, in a comment on my earlier post,<\/a> reader Roger H has highlighted a newspaper article<\/a> that compares before and after images of the site of the landslide:-<\/p>\n

\"Castell

Before and after images of the Castell de Mur landslide in Spain, via segre.com<\/a><\/p><\/div>\n

.<\/p>\n

There are several really interesting features here.\u00a0 In the images the remains of the former village can be seen, including ruined houses and the tiny chapel, which was destroyed in the landslide.\u00a0 It is also clear that the Castell de Mur landslide occurred in an area of\u00a0 undercutting and rockfall events.<\/p>\n

The final failure was recorded on seismic instruments.\u00a0 ICTJA have posted the seismic records online<\/a>:<\/p>\n

\"Castell

ICTJA seismic data<\/a> for the Castell de Mur landslide in Spain.<\/p><\/div>\n

.<\/p>\n

The translation of their text states:-<\/p>\n

In this image you can observe the seismic wave caused by the detachment of land that occurred in the area of Castell de Mur, in the Pallars Kuss\u00e0 and which could be recorded by different stations of the seismic network of catalonia of catalonia . It can be established, from these records, that the landslide occurred at 14:33 p.m. on 16 April. <\/span><\/em><\/p>\n

The image, made from the data processing made by our researcher Jordi Diaz Cusi<\/a>, shows the vibration of the floor in the vertical direction recorded by the stations located near\u00a0 Balaguer, Pont de Suert, Sort and Organy\u00e0, at Between 25 and 40 km from the place where the event occurred.<\/span><\/em><\/p>\n

“the signal is weak and can only be identified after properly processing the data”, explains Jordi Diaz.<\/span><\/em><\/p>\n

Although it is not easy to attribute a magnitude value to this type of signals, from the ICGC they indicate that it would be the equivalent of a very small earthquake, of local magnitude 0.8.\u00a0 Thus, the vibrations produced by the detachment could only be perceived near the place where it occurred.<\/span><\/em><\/p>\n","protected":false},"excerpt":{"rendered":"

More information is now available about the Castell de Mur landslide in Spain on 16th April, including drone images, before and after photographs and the seismic traces<\/p>\n","protected":false},"author":22,"featured_media":27497,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[3],"tags":[144,469,959,136,249,540],"class_list":["post-27492","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-landslide-report","tag-europe","tag-featured","tag-landslide-report","tag-rockslide","tag-spain","tag-topple"],"_links":{"self":[{"href":"https:\/\/blogs.agu.org\/landslideblog\/wp-json\/wp\/v2\/posts\/27492","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=27492"}],"version-history":[{"count":0,"href":"https:\/\/blogs.agu.org\/landslideblog\/wp-json\/wp\/v2\/posts\/27492\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/blogs.agu.org\/landslideblog\/wp-json\/wp\/v2\/media\/27497"}],"wp:attachment":[{"href":"https:\/\/blogs.agu.org\/landslideblog\/wp-json\/wp\/v2\/media?parent=27492"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blogs.agu.org\/landslideblog\/wp-json\/wp\/v2\/categories?post=27492"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blogs.agu.org\/landslideblog\/wp-json\/wp\/v2\/tags?post=27492"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}