{"id":2809,"date":"2015-09-05T10:31:02","date_gmt":"2015-09-05T18:31:02","guid":{"rendered":"http:\/\/earthjay.com\/?p=2809"},"modified":"2015-09-05T10:31:02","modified_gmt":"2015-09-05T18:31:02","slug":"aleutian-subduction-zone-earthquake-near-the-amlia-fracture-zone","status":"publish","type":"post","link":"https:\/\/earthjay.com\/?p=2809","title":{"rendered":"Aleutian subduction zone earthquake near the Amlia fracture zone!"},"content":{"rendered":"

Last night, as I was ending my day, there was a swarm of seismicity near the Amlia fracture zone. This morning, there were more earthquakes. This swarm is west of a swarm in early August 2015 near Nikolski. Here is the USGS web site<\/a> for the M 5.6 earthquake. The Nikolski Swarm included a M 6.9 earthquake. Here is my page about the July portion of the Nikolski Swarm<\/a>.
\nBelow is a map that shows these two swarms. I placed the USGS moment tensor for the M 5.6. I placed a moment tensor \/ focal mechanism legend in the upper right corner of the map. There is more material from the USGS web sites about moment tensors<\/a> and focal mechanisms<\/a> (the beach ball symbols). Both moment tensors and focal mechanisms are solutions to seismologic data that reveal two possible interpretations for fault orientation and sense of motion. One must use other information, like the regional tectonics, to interpret which of the two possibilities is more likely.
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\nThis is a USGS graphic that shows a cross section of the Aleutian subduction zone that is a part of the “Eastern Aleutian Volcanic Arc Digital Model<\/a>.’
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\nThis map, that I put together for the July portion of the Nikolski Swarm, shows some recent historic earthquakes and their moment tensors for this region of the Aleutian subduction zone.
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\nHere is a map that shows regions of slip for historic earthquakes put together by Peter Haussler (USGS).
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\nLast night, as I was ending my day, there was a swarm of seismicity near the Amlia fracture zone. This morning, there were more earthquakes. This swarm is west of a swarm in early August 2015 near Nikolski. Here is…\n<\/div>\n
Continue reading “Aleutian subduction zone earthquake near the Amlia fracture zone!”<\/span>…<\/a><\/div>\n","protected":false},"author":3,"featured_media":2810,"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":[42,50,5,6,7,9,27,34],"tags":[],"aioseo_notices":[],"jetpack_featured_media_url":"https:\/\/earthjay.com\/wp-content\/uploads\/2015\/09\/20150905_atka_interpretation-scaled.jpg","_links":{"self":[{"href":"https:\/\/earthjay.com\/index.php?rest_route=\/wp\/v2\/posts\/2809"}],"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=2809"}],"version-history":[{"count":0,"href":"https:\/\/earthjay.com\/index.php?rest_route=\/wp\/v2\/posts\/2809\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/earthjay.com\/index.php?rest_route=\/wp\/v2\/media\/2810"}],"wp:attachment":[{"href":"https:\/\/earthjay.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=2809"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/earthjay.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=2809"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/earthjay.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=2809"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}