Event Name : Shishaldin 2017/12
|Start:||November 2017 ± 14 Days||Observed|
|Stop:||January 2018 ± 30 Days||Observed|
|Seismicity with no confirmed eruption: ||
|Eruption Type:||Not an eruption.|
On December 6, 2017, citing increased seismic and infrasound activity at Shishaldin over the past few weeks, AVO raised the Aviation Color Code and Volcanic Alert Level from GREEN/NORMAL to YELLOW/ADVISORY. These observations represent a departure from normal background activity at Shishaldin, but do not necessarily indicate that an eruption will occur.
AVO lowered the Aviation Color Code and Volcano Alert Level to GREEN/NORMAL on February 7, 2018, citing declining seismicity and infrasound activity over the previous month.