{"id":7641,"date":"2018-08-15T12:42:02","date_gmt":"2018-08-15T12:42:02","guid":{"rendered":"http:\/\/icelandgeology.net\/?p=7641"},"modified":"2018-08-15T12:51:50","modified_gmt":"2018-08-15T12:51:50","slug":"oraefajokull-volcano-eruptions-in-1362-and-1727-possibly-larger-than-previously-thought","status":"publish","type":"post","link":"https:\/\/icelandgeology.net\/?p=7641","title":{"rendered":"\u00d6r\u00e6faj\u00f6kull volcano eruptions in 1362 and 1727 possibly larger than previously thought"},"content":{"rendered":"<p>According to a news report an early result from a field study into <a href=\"https:\/\/volcano.si.edu\/volcano.cfm?vn=374010\" target=\"_blank\" rel=\"noopener\">\u00d6r\u00e6faj\u00f6kull<\/a> volcano eruptions in 1362 and 1727 suggest that those eruptions where possibly larger then previously thought.<\/p>\n<p>According to the research so far the following has been discovered.<\/p>\n<ul>\n<li>Volcano ash layers from the eruption 1362 are 3 meters thick. They where thought be around 0,5 meters thick. This suggests that the eruption in 1362 was larger than previously thought.<\/li>\n<li>The craters from the eruption 1727 have been found. That eruption was close to the Fimmv\u00f6r\u00f0uh\u00e1ls eruption in Eyjafjallaj\u00f6kull volcano in 2010 (not under glacier eruption).<\/li>\n<li>Pictures of the <a href=\"https:\/\/en.wikipedia.org\/wiki\/Magma#Composition,_melt_structure_and_properties\" target=\"_blank\" rel=\"noopener\">magma<\/a> that has been found suggest that both eruptions where highly felsic (rhyolitic) type and high in gas content. There are also high in crystals (known as <a href=\"https:\/\/opentextbc.ca\/geology\/chapter\/3-3-crystallization-of-magma\/\" target=\"_blank\" rel=\"noopener\">crystallization of magma<\/a>). What type of crystals is not known at the moment (not mentioned in the news).<\/li>\n<\/ul>\n<p>That fact does explain the current process of earthquakes in \u00d6r\u00e6faj\u00f6kull volcano and why earthquake activity drops down to almost nothing every few weeks in \u00d6r\u00e6faj\u00f6kull volcano. The magma in \u00d6r\u00e6faj\u00f6kull volcano is slow moving and there is a lot of it. Current volume is around the same that started the eruption in Eyjafjallaj\u00f6kull volcano in 2010 (there are massive differences between the two, so comparing the volcanoes is subject to limitations).<br \/>\n<strong><br \/>\nIcelandic News from V\u00edsir.is<\/strong><\/p>\n<p><a href=\"http:\/\/www.visir.is\/g\/2018180819438\/fyrri-eldgos-i-oraefajokli-mun-oflugri-en-adur-var-talid\" rel=\"noopener\" target=\"_blank\">Fyrri eldgos \u00ed \u00d6r\u00e6faj\u00f6kli mun \u00f6flugri en \u00e1\u00f0ur var tali\u00f0<\/a> (V\u00edsir.is, Video, images, Icelandic only)<\/p>\n<p><strong>Donations<\/strong><\/p>\n<p>Please remember to support my work with donations. Everything helps. Thanks for the support. \ud83d\ude42<\/p>\n","protected":false},"excerpt":{"rendered":"<p>According to a news report an early result from a field study into \u00d6r\u00e6faj\u00f6kull volcano eruptions in 1362 and 1727 suggest that those eruptions where possibly larger then previously thought. According to the research so far the following has been discovered. Volcano ash layers from the eruption 1362 are 3 meters thick. They where thought &hellip; <\/p>\n<p class=\"link-more\"><a href=\"https:\/\/icelandgeology.net\/?p=7641\" class=\"more-link\">Continue reading<span class=\"screen-reader-text\"> &#8220;\u00d6r\u00e6faj\u00f6kull volcano eruptions in 1362 and 1727 possibly larger than previously thought&#8221;<\/span><\/a><\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[87,88,158,32],"tags":[],"class_list":["post-7641","post","type-post","status-publish","format-standard","hentry","category-oraefajokull","category-science","category-study","category-volcano"],"_links":{"self":[{"href":"https:\/\/icelandgeology.net\/index.php?rest_route=\/wp\/v2\/posts\/7641","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/icelandgeology.net\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/icelandgeology.net\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/icelandgeology.net\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/icelandgeology.net\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=7641"}],"version-history":[{"count":2,"href":"https:\/\/icelandgeology.net\/index.php?rest_route=\/wp\/v2\/posts\/7641\/revisions"}],"predecessor-version":[{"id":7643,"href":"https:\/\/icelandgeology.net\/index.php?rest_route=\/wp\/v2\/posts\/7641\/revisions\/7643"}],"wp:attachment":[{"href":"https:\/\/icelandgeology.net\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=7641"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/icelandgeology.net\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=7641"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/icelandgeology.net\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=7641"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}