{"id":671,"date":"2013-08-15T19:32:11","date_gmt":"2013-08-16T03:32:11","guid":{"rendered":"http:\/\/earthjay.com\/?p=671"},"modified":"2023-08-30T15:30:57","modified_gmt":"2023-08-30T15:30:57","slug":"m-6-8-on-the-south-island-of-new-zealand","status":"publish","type":"post","link":"https:\/\/earthjay.com\/?p=671","title":{"rendered":"M 6.8 on the South Island of New Zealand"},"content":{"rendered":"<p>here is a big earthquake! M = 6.8, now a 6.5 depth = 10km pretty shallow (may change). it ruptured part of the Marlborough fault zone (part of the Alpine fault system).<\/p>\n<p>the moment tensor fits the fault map, a right lateral strike slip earthquake on northeast striking fault (most likely).<\/p>\n<p><a href=\"http:\/\/earthjay.com\/earthquakes\/20130815_south_island_NZ\/20130815_SI_NZ_USMww_moment_tensor.png\" target=\"new\" rel=\"noopener\"><img decoding=\"async\" alt=\"M=6.5 NW south Island\" src=\"http:\/\/earthjay.com\/earthquakes\/20130815_south_island_NZ\/20130815_SI_NZ_USMww_moment_tensor.png\"\/><\/a><\/p>\n<p>looks like the eel river valley, but in New Zealand: <a href=\"http:\/\/comcat.cr.usgs.gov\/earthquakes\/eventpage\/usb000j4iz.kml\" target=\"new\" rel=\"noopener\">USGS kml file<\/a><\/p>\n<p>there was a smaller quake swarm just to the east in the last 2 weeks (they are in orange in my map). it caused landslides (lateral spreads i saw in some photos). this EQ may indeed be related, but i have no direct information about that (tho triggering that does happen proceeds in a short time following the trigger quake). ill need to look that last one up.<\/p>\n<p>here is the usgs page:<br \/>\n<a href=\"https:\/\/earthquake.usgs.gov\/earthquakes\/eventpage\/usb000j4iz#executive\" target=\"new\" rel=\"noopener\">http:\/\/comcat.cr.usgs.gov\/earthquakes\/eventpage\/usb000j4iz#summary<\/a><\/p>\n<p>here is an article on the damage:<br \/>\n<a href=\"http:\/\/www.nzherald.co.nz\/nz\/news\/article.cfm?c_id=1&amp;objectid=10913399\" target=\"new\" rel=\"noopener\">http:\/\/www.nzherald.co.nz\/nz\/news\/article.cfm?c_id=1&amp;objectid=10913399<\/a><\/p>\n<p>here is a map<br \/>\n<a href=\"http:\/\/earthjay.com\/earthquakes\/20130815_south_island_NZ\/20130815_M68_south_isle_NZ_2056.PNG\" target=\"new\" rel=\"noopener\"><img decoding=\"async\" alt=\"M=6.5 NW south Island\" src=\"http:\/\/earthjay.com\/earthquakes\/20130815_south_island_NZ\/20130815_M68_south_isle_NZ_2056.PNG\" width=\"100%\" \/><\/a><\/p>\n<p>here is a map with the USGS shakemap overlay:<br \/>\n<a href=\"http:\/\/earthjay.com\/earthquakes\/20130815_south_island_NZ\/20130815_M68_shakemap_south_isle_NZ_2056.PNG\" target=\"new\" rel=\"noopener\"><img decoding=\"async\" alt=\"M=6.5 NW south Island\" src=\"http:\/\/earthjay.com\/earthquakes\/20130815_south_island_NZ\/20130815_M68_shakemap_south_isle_NZ_2056.PNG\" width=\"100%\" \/><\/a><\/p>\n<p>here is a map with historic earthquakes plotted as grey circles (note epicenters near Christchurch on the lower part of the map):<br \/>\n<a href=\"http:\/\/earthjay.com\/earthquakes\/20130815_south_island_NZ\/20130815_M68_historic_south_isle_NZ_2056.PNG\" target=\"new\" rel=\"noopener\"><img decoding=\"async\" alt=\"M=6.5 NW south Island\" src=\"http:\/\/earthjay.com\/earthquakes\/20130815_south_island_NZ\/20130815_M68_historic_south_isle_NZ_2056.PNG\" width=\"100%\" \/><\/a><\/p>\n<p>here is a low angle oblique view, looking south-west along the axis of the south island. the Marlborough fault system forms the mountain ranges you are looking at (they are largely pointed at you). the main M=6.5 epicenter is the large orange dot above the red dot (&#8220;&#8230;just below the main port&#8221; in star wars). the Alpine fault is the red line off in the distance (though it is not placed well due to the scale of those data).<\/p>\n<p><a href=\"http:\/\/earthjay.com\/earthquakes\/20130815_south_island_NZ\/20130815_M68_historic_oblique_south_isle_NZ_2056.PNG\" target=\"new\" rel=\"noopener\"><img decoding=\"async\" alt=\"M=6.5 NW south Island\" src=\"http:\/\/earthjay.com\/earthquakes\/20130815_south_island_NZ\/20130815_M68_historic_oblique_south_isle_NZ_2056.PNG\" width=\"100%\" \/><\/a><\/p>\n<p>here is a map made by Mike Norton:<br \/>\n<a href=\"http:\/\/upload.wikimedia.org\/wikipedia\/commons\/7\/74\/NZ_faults_.png\" target=\"new\" rel=\"noopener\"><br \/>\n<img decoding=\"async\" alt=\"http:\/\/en.wikipedia.org\/wiki\/File:NZ_faults_.png\" src=\"http:\/\/earthjay.com\/earthquakes\/20160214_new_zealand\/NZ_faults.png\" width=\"100%\" \/><\/a><\/p>\n<p>here is the usgs page on the tectonics of the region:<br \/>\n<a href=\"http:\/\/earthjay.com\/earthquakes\/20130815_south_island_NZ\/emaustralia_tsum.pdf\" target=\"new\" rel=\"noopener\"><img decoding=\"async\" alt=\"M=6.5 NW south Island\" src=\"http:\/\/earthjay.com\/earthquakes\/20130815_south_island_NZ\/emaustralia_tsum.jpg\" width=\"100%\" \/><\/a> 4.5 MB pdf<\/p>\n","protected":false},"excerpt":{"rendered":"<div class=\"entry-summary\">\nhere is a big earthquake! M = 6.8, now a 6.5 depth = 10km pretty shallow (may change). it ruptured part of the Marlborough fault zone (part of the Alpine fault system). the moment tensor fits the fault map, a&hellip;\n<\/div>\n<div class=\"link-more\"><a href=\"https:\/\/earthjay.com\/?p=671\" class=\"more-link\">Continue reading<span class=\"screen-reader-text\"> &ldquo;M 6.8 on the South Island of New Zealand&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":[7,34,1],"tags":[],"aioseo_notices":[],"jetpack_featured_media_url":"","_links":{"self":[{"href":"https:\/\/earthjay.com\/index.php?rest_route=\/wp\/v2\/posts\/671"}],"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=671"}],"version-history":[{"count":2,"href":"https:\/\/earthjay.com\/index.php?rest_route=\/wp\/v2\/posts\/671\/revisions"}],"predecessor-version":[{"id":11238,"href":"https:\/\/earthjay.com\/index.php?rest_route=\/wp\/v2\/posts\/671\/revisions\/11238"}],"wp:attachment":[{"href":"https:\/\/earthjay.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=671"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/earthjay.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=671"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/earthjay.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=671"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}