{"id":2119,"date":"2015-01-29T11:29:25","date_gmt":"2015-01-29T19:29:25","guid":{"rendered":"http:\/\/earthjay.com\/?p=2119"},"modified":"2015-01-29T11:29:25","modified_gmt":"2015-01-29T19:29:25","slug":"mendocino-fault-aftershocks-update","status":"publish","type":"post","link":"https:\/\/earthjay.com\/?p=2119","title":{"rendered":"Mendocino fault Aftershocks: Update"},"content":{"rendered":"<p>The aftershocks continue following the <a href=\"http:\/\/earthquake.usgs.gov\/earthquakes\/eventpage\/nc72381011#scientific_summary\" target=\"_blank\" rel=\"noopener\">Mw 5.7 mainshock<\/a> earthquake swarm along the Mendocino fault. <a href=\"http:\/\/earthjay.com\/?p=2090\">Yesterday<\/a> I plotted my interpretation for the location of the fault that this swarm may have ruptured upon. Some epicenters have been relocated and appear to better align with the fault that I placed on my map.<br \/>\nHere is the map from this morning, updated at 9:22 AM local time. We just had a Mw 4.3 aftershock. If you felt it (or not!), please go <a href=\"http:\/\/earthquake.usgs.gov\/earthquakes\/eventpage\/nc72388626#impact_tellus\" target=\"_blank\" rel=\"noopener\">here <\/a>to report your observations. I have not edited the fault lines that I had plotted yesterday. You can compare this map with the map below, which I made around 9 PM last night.<br \/>\n<a href=\"http:\/\/earthjay.com\/earthquakes\/20150128_ferndale\/20150128_ferndale_regional_map_explanation_20150129_1120.pdf\" target=\"_blank\" rel=\"noopener\"><br \/>\n<img decoding=\"async\" src=\"http:\/\/earthjay.com\/earthquakes\/20150128_ferndale\/20150128_ferndale_regional_map_explanation_20150129_1120.jpg\" width=\"100%\" alt=\"\" \/><\/a><br \/>\nHere is the map from last night, for comparison. Note how some epicenters have aligned more closely to the faults that I drew on the map yesterday. At first, I thought there might be an off-fault triggered swarm along a conjugate fault that strikes north-south. There are three epicenters on the eastern region of this swarm. However, since the locations have been updated (see above map), there is now only one of these off-fault epicenters remaining. So, it was my imagination.<br \/>\n<a href=\"http:\/\/earthjay.com\/earthquakes\/20150128_ferndale\/20150128_ferndale_regional_map_explanation_2100.pdf\" target=\"_blank\" rel=\"noopener\"><br \/>\n<img decoding=\"async\" src=\"http:\/\/earthjay.com\/earthquakes\/20150128_ferndale\/20150128_ferndale_regional_map_explanation_2100.jpg\" width=\"100%\" alt=\"\" \/><\/a><\/p>\n<ul>\nHere are the USGS earthquake web pages for the larger magnitude earthquakes of this swarm that have focal mechanism or moment tensor fault solutions.<\/p>\n<li><a href=\"http:\/\/earthquake.usgs.gov\/earthquakes\/eventpage\/nc72381011#scientific_summary\" target=\"_blank\" rel=\"noopener\">Mw 4.3<\/a> foreshock<\/li>\n<li><a href=\"http:\/\/earthquake.usgs.gov\/earthquakes\/eventpage\/nc72385806#scientific_summary\" target=\"_blank\" rel=\"noopener\">Ml 3.2<\/a> foreshock<\/li>\n<li><a href=\"http:\/\/earthquake.usgs.gov\/earthquakes\/eventpage\/nc72387946#general_summary\" target=\"_blank\" rel=\"noopener\">Mw 5.7 <\/a> mainshock<\/li>\n<li><a href=\"http:\/\/earthquake.usgs.gov\/earthquakes\/eventpage\/nc71089479#scientific_summary\" target=\"_blank\" rel=\"noopener\">Ml 3.1<\/a> aftershock<\/li>\n<li><a href=\"http:\/\/earthquake.usgs.gov\/earthquakes\/eventpage\/nc72388626#general_summary\" target=\"_blank\" rel=\"noopener\">Mw 4.3<\/a> aftershock<\/li>\n<\/ul>\n<ul>\nThe Northern California Seismic System (NCSS) operated by UC Berkeley and USGS generated a <a href=\"http:\/\/www.ncedc.org\/recenteqs\/QuakeAddons\/NC72387946.html\" target=\"_blank\" rel=\"noopener\">series of probabilities<\/a> for aftershocks related to the Mw 5.7 earthquake. This was updated this morning for version 3.<\/p>\n<li>STRONG AFTERSHOCKS (Magnitude 5 and larger) &#8211;<br \/>\nAt this time (18 hours after the mainshock) the probability of a strong and possibly damaging aftershock IN THE NEXT 7 DAYS is approximately 19 PERCENT<\/li>\n<li>EARTHQUAKES LARGER THAN THE MAINSHOCK &#8211;<br \/>\nMost likely, the recent mainshock will be the largest in the sequence. However, there is a small chance (APPROXIMATELY 5 TO 10 PERCENT) of an earthquake equal to or larger than this mainshock in the next 7 days.<\/li>\n<li>WEAK AFTERSHOCKS (Magnitude 3 to 5) &#8211;<br \/>\nIn addition, approximately 5 to 25 SMALL AFTERSHOCKS are expected in the same 7-DAY PERIOD and may be felt locally.<\/li>\n<li>This probability report is based on the statistics of aftershocks typical for California. This is not an exact prediction, but only a rough guide to expected aftershock activity. This probability report may be revised as more information becomes available.<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<div class=\"entry-summary\">\nThe aftershocks continue following the Mw 5.7 mainshock earthquake swarm along the Mendocino fault. Yesterday I plotted my interpretation for the location of the fault that this swarm may have ruptured upon. Some epicenters have been relocated and appear to&hellip;\n<\/div>\n<div class=\"link-more\"><a href=\"https:\/\/earthjay.com\/?p=2119\" class=\"more-link\">Continue reading<span class=\"screen-reader-text\"> &ldquo;Mendocino fault Aftershocks: Update&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":[48,49,5,6,7,10,20,27],"tags":[],"aioseo_notices":[],"jetpack_featured_media_url":"","_links":{"self":[{"href":"https:\/\/earthjay.com\/index.php?rest_route=\/wp\/v2\/posts\/2119"}],"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=2119"}],"version-history":[{"count":0,"href":"https:\/\/earthjay.com\/index.php?rest_route=\/wp\/v2\/posts\/2119\/revisions"}],"wp:attachment":[{"href":"https:\/\/earthjay.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=2119"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/earthjay.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=2119"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/earthjay.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=2119"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}