Great Sitkin (ORANGE/WATCH): The active dome shows up as a persistent weak thermal anomaly in VIIRS mid-IR images over the past 24 hours. The few daylight webcam views were cloudy.
Associated Keywords:
Elevated surface temperatures: barely elevated;
Cloud cover: cloudy; partly cloudy;

Shishaldin (YELLOW/ADVISORY): Very weak thermal anomaly at the summit in a few VIIRS mid-IR images early this morning. Typical-looking gas plume visible in clear daytime webcam views.

Associated Images:
375mAKSH-MIR-d20251216t1225910752Z.png

Associated Keywords:
Volcanic clouds: steam/water;
Elevated surface temperatures: barely elevated;
Cloud cover: partly cloudy;

Semisopochnoi (GREEN/NORMAL): I added Semisophochnoi here just to note that I have seen NO plume at Mount Young in sparse clear views over the past couple of days. Maybe others have already noticed this, but this is the first time I haven't seen a plume there in years.
Associated Keywords:
Cloud cover: partly cloudy;