USGS needs your help figuring out whne the glow first appeared.
At the webcam site, scroll down a little and you will see a picture of last night's glow. That is what I saw this morning. You'll also see this;
"We need your help! We are looking for VolcanoCam nightowls who are able to tell us when they first observed the glow. Using the VolcanoCam date and time (not your local time) you first observed the glow, we will pass along the information to the USGS. "