{"id":2158,"date":"2015-02-16T17:39:51","date_gmt":"2015-02-17T01:39:51","guid":{"rendered":"http:\/\/earthjay.com\/?p=2158"},"modified":"2015-02-16T17:39:51","modified_gmt":"2015-02-17T01:39:51","slug":"sandwich-earthquakes-mmmmm","status":"publish","type":"post","link":"https:\/\/earthjay.com\/?p=2158","title":{"rendered":"Sandwich Earthquakes in Scotia, mmmmm"},"content":{"rendered":"<p>We have had a swarm of earthquakes near the Sandwich Islands along the Scotia subduction zone, an oceanic subduction zone. Here is the <a href=\"http:\/\/earthquake.usgs.gov\/earthquakes\/eventpage\/usb000tpuw#general_summary\" target=\"_blank\" rel=\"noopener\">USGS web page<\/a> for this earthquake.<br \/>\nHere is a map showing the regional tectonic setting with relative plate motion arrows.<br \/>\n<a href=\"http:\/\/earthjay.com\/earthquakes\/20150216_sandwich\/20150216_sandwich_interpretation.pdf\" target=\"_blank\" rel=\"noopener\"><br \/>\n<img decoding=\"async\" src=\"http:\/\/earthjay.com\/earthquakes\/20150216_sandwich\/20150216_sandwich_interpretation.jpg\" width=\"100%\" alt=\"\" \/><\/a><br \/>\nHere is a map that shows the global tectonic setting.<br \/>\n<a href=\"http:\/\/earthjay.com\/earthquakes\/20150216_sandwich\/20150216_sandwich_global_map.JPG\" target=\"_blank\" rel=\"noopener\"><br \/>\n<img decoding=\"async\" src=\"http:\/\/earthjay.com\/earthquakes\/20150216_sandwich\/20150216_sandwich_global_map.JPG\" width=\"100%\" alt=\"\" \/><\/a><br \/>\nThere were a number of large earthquakes along the transform plate boundaries in the last year or so, west of today&#8217;s earthquake swarm.<\/p>\n<ul>\n<li><a href=\"http:\/\/earthjay.com\/?p=1108\" target=\"_blank\" rel=\"noopener\">2013\/11\/17 M 6.8<\/a><\/li>\n<li><a href=\"http:\/\/earthjay.com\/?p=1112\" target=\"_blank\" rel=\"noopener\">2013\/11\/17 M 7.8<\/a><\/li>\n<li><a href=\"http:\/\/earthjay.com\/?p=1151\" target=\"_blank\" rel=\"noopener\">2013\/11\/25 M 7.0<\/a><\/li>\n<li><a href=\"http:\/\/earthjay.com\/?p=1376\" target=\"_blank\" rel=\"noopener\">2014\/3\/12 M 6.4<\/a><\/li>\n<\/ul>\n<p>This shows the slab contours in this region.<br \/>\n<a href=\"http:\/\/earthjay.com\/earthquakes\/20150216_sandwich\/20150216_sandwich_local_map_contours.JPG\" target=\"_blank\" rel=\"noopener\"><br \/>\n<img decoding=\"async\" src=\"http:\/\/earthjay.com\/earthquakes\/20150216_sandwich\/20150216_sandwich_local_map_contours.JPG\" width=\"100%\" alt=\"\" \/><\/a><br \/>\nThis shows the historic earthquakes in this region.<br \/>\n<a href=\"http:\/\/earthjay.com\/earthquakes\/20150216_sandwich\/20150216_sandwich_local_map_historic.JPG\" target=\"_blank\" rel=\"noopener\"><br \/>\n<img decoding=\"async\" src=\"http:\/\/earthjay.com\/earthquakes\/20150216_sandwich\/20150216_sandwich_local_map_historic.JPG\" width=\"100%\" alt=\"\" \/><\/a><br \/>\nThis map shows an interpretation of the regional tectonics from <a href=\"http:\/\/plate-tectonic.narod.ru\/scotia1photoalbum.html\" target=\"_blank\" rel=\"noopener\">here<\/a>.<br \/>\n<a href=\"http:\/\/earthjay.com\/earthquakes\/20131125_M70_south_atlantic\/scotia_sea_gateway.jpg\" target=\"_blank\" rel=\"noopener\"><br \/>\n<img decoding=\"async\" src=\"http:\/\/earthjay.com\/earthquakes\/20131125_M70_south_atlantic\/scotia_sea_gateway.jpg\" width=\"100%\" alt=\"\" \/><\/a><br \/>\nAlso, here is a short explanation (from the <a href=\"http:\/\/earthquake.usgs.gov\/learn\/topics\/beachball.php\" target=\"_blank\" rel=\"noopener\">USGS<\/a>) of the graphical solutions for focal mechanisms. While moment tensors (shown in my interpretation figure above) and focal mechanisms are determined differently, their graphic representation of the deformation from earthquakes is the same.<br \/>\n<a href=\"http:\/\/earthjay.com\/earthquakes\/20150130_loyalty\/beachball.gif\"><br \/>\n<img decoding=\"async\" src=\"http:\/\/earthjay.com\/earthquakes\/20150130_loyalty\/beachball.gif\" width=\"100%\" alt=\"\" \/><\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<div class=\"entry-summary\">\nWe have had a swarm of earthquakes near the Sandwich Islands along the Scotia subduction zone, an oceanic subduction zone. Here is the USGS web page for this earthquake. Here is a map showing the regional tectonic setting with relative&hellip;\n<\/div>\n<div class=\"link-more\"><a href=\"https:\/\/earthjay.com\/?p=2158\" class=\"more-link\">Continue reading<span class=\"screen-reader-text\"> &ldquo;Sandwich Earthquakes in Scotia, mmmmm&rdquo;<\/span>&hellip;<\/a><\/div>\n","protected":false},"author":3,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0},"categories":[49,6,7,27,34,38],"tags":[],"aioseo_notices":[],"jetpack_featured_media_url":"","_links":{"self":[{"href":"https:\/\/earthjay.com\/index.php?rest_route=\/wp\/v2\/posts\/2158"}],"collection":[{"href":"https:\/\/earthjay.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/earthjay.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/earthjay.com\/index.php?rest_route=\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/earthjay.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=2158"}],"version-history":[{"count":0,"href":"https:\/\/earthjay.com\/index.php?rest_route=\/wp\/v2\/posts\/2158\/revisions"}],"wp:attachment":[{"href":"https:\/\/earthjay.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=2158"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/earthjay.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=2158"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/earthjay.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=2158"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}