{"id":2244,"date":"2010-11-02T03:33:08","date_gmt":"2010-11-02T07:33:08","guid":{"rendered":"http:\/\/blogs.agu.org\/landslideblog\/?p=2244"},"modified":"2010-11-02T15:02:42","modified_gmt":"2010-11-02T19:02:42","slug":"the-canterbury-earthquake-images-of-the-distorted-railway-line","status":"publish","type":"post","link":"https:\/\/blogs.agu.org\/landslideblog\/2010\/11\/02\/the-canterbury-earthquake-images-of-the-distorted-railway-line\/","title":{"rendered":"The Canterbury Earthquake: Images of the distorted railway line"},"content":{"rendered":"

Back in September I posted a series of images <\/a>that I took of the of the surface fault rupture for the 4th September 2010 Mw = 7.1 Canterbury earthquake in New Zealand.\u00a0 Included was this one, taken of a railway line that crossed the fault rupture at the eastern end of the fault near to Rolleston:<\/p>\n

\"\"<\/a><\/p>\n

Thanks to Malcolm Teasdale of Kiwirail<\/a> for sending these two images of the state of the track at this site immediately after the earthquake (posted with permission):<\/p>\n

\"\"<\/a><\/p>\n

\"\"<\/a><\/p>\n

The second image is particularly interesting.\u00a0 Note how the rails show high levels of deformation whilst the surrounding ground shows comparatively little.\u00a0 Notice also how the big kink on the left side has pushed the ballast aside and into the track side ditch\u00a0 This has happened on the right side too, but to a lesser extent.\u00a0 The right side bend nearest the camera has pushed the ballast towards the camera.<\/p>\n

My initial hypothesis here (I am no expert on railway track\u00a0deformation) in order to stimulate discussion\u00a0is that the buckling may be the result of compressional deformation across a broad zone.\u00a0 The compression on the very strong railway line was accommodated when a weak point was found, leading to a comparatively rapid deformation to form the main buckle on the left.\u00a0 This then concentrated stress on both sides of the buckle, allowing the other (right side) bends to form.\u00a0 Can anyone who knows more on this topic comment further?<\/p>\n","protected":false},"excerpt":{"rendered":"

A recent post was centred on images of the fault rupture of the September 2010 Canterbury earthquake in New Zealand. This post uses images provided by Malcolm Teasdale of Kiwirail to show the kine buckling that occurred on a railway track at the point that it crossed area of the surface fault expression close to Rolleston at the east end of the fault system.<\/p>\n","protected":false},"author":22,"featured_media":2247,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[23,469,7,80],"class_list":["post-2244","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-uncategorized","tag-earthquake","tag-featured","tag-new-zealand","tag-railway"],"_links":{"self":[{"href":"https:\/\/blogs.agu.org\/landslideblog\/wp-json\/wp\/v2\/posts\/2244","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=2244"}],"version-history":[{"count":0,"href":"https:\/\/blogs.agu.org\/landslideblog\/wp-json\/wp\/v2\/posts\/2244\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/blogs.agu.org\/landslideblog\/wp-json\/wp\/v2\/media\/2247"}],"wp:attachment":[{"href":"https:\/\/blogs.agu.org\/landslideblog\/wp-json\/wp\/v2\/media?parent=2244"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blogs.agu.org\/landslideblog\/wp-json\/wp\/v2\/categories?post=2244"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blogs.agu.org\/landslideblog\/wp-json\/wp\/v2\/tags?post=2244"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}