Description: From Dixon and others (2015): "In the first 2 months of 2013, persistent long-period earthquakes, occurring in pairs, continued at Shishaldin Volcano from activity that started in 2012 (fig. 34 in original text). This persistent seismicity, commonly seen on seismograph stations SSLN and SSBA, is similar to events seen by Caplan-Auerbach in 2003 (Caplan-Auerbach and Petersen, 2005) and is thought to be caused by fluid flow in a conduit. The initial signs of a failing network were seen in March, and by the end of the year, the lone broadband seismograph station in the Shishaldin network was the only reliable station for monitoring, preventing a full description of the seismicity in 2013. The long-period events that have been commonplace on the Shishaldin seismograph network since the 1999 eruption continued throughout the year. In 2013, one report of steaming from the Shishaldin summit was documented on clear Web camera views. Such clear views of Shishaldin are unusual, and the noted activity is typical of persistent degassing from Shishaldin that is not often seen because of poor visibility. The Aviation Color Code and Volcano Alert Level remained at GREEN/NORMAL throughout the year."