{"id":3839,"date":"2016-03-27T12:48:44","date_gmt":"2016-03-27T20:48:44","guid":{"rendered":"http:\/\/earthjay.com\/?p=3839"},"modified":"2016-03-27T12:48:44","modified_gmt":"2016-03-27T20:48:44","slug":"earthquake-report-nokolski","status":"publish","type":"post","link":"https:\/\/earthjay.com\/?p=3839","title":{"rendered":"Earthquake Report: Nikolski!"},"content":{"rendered":"

As I was writing my page on the 1964 Great Alaska Earthquake (here<\/a>), there was a M 5.7 earthquake along the Aleutian Trench east of the Amlia fracture zone. Here is the USGS web page for this earthquake<\/a>. The region around the AFZ is quite active, with the most recent series of earthquakes this month. Here is my earthquake report on those earthquakes<\/a>.
\nI put together a quick earthquake report poster posted below. I include the USGS moment tensor. More on the tectonics of Alaska can be found in this USGS Open-File Report (Benz et al., 2010)<\/a>.
\nThere is a legend that shows how moment tensors can be interpreted. Moment tensors are graphical solutions of seismic data that show two possible fault plane solutions. One must use local tectonics, along with other data, to be able to interpret which of the two possible solutions is correct. The legend shows how these two solutions are oriented for each example (Normal\/Extensional, Thrust\/Compressional, and Strike-Slip\/Shear). There is more about moment tensors<\/a> and focal mechanisms<\/a> at the USGS.<\/p>\n