Update, September 25, 2014, 4:14 p.m. They just released a nice video summary of the 2004-2008 eruption!
Information: United States Geological Survey.
Note: Volcano Cowboys is one of the books I’ve read that gives a good informal but thorough history of just how much the eruption of this volcano in 1980 changed US volcano monitoring (and it has a lot of interesting information on key individuals, as well as other volcanoes – it all sort of ties together).
This effect lasted into the 21st century. The Mount St. Helens VolcanoCam run by the US Forest Service was one of the first, if not the first, volcano cam to become popular online (because everybody knows MSH, I guess).
It was the first volcano cam I followed online, too.
The camera was actually donated to them, and they aimed it at Mount St. Helens. Nobody, including the donors, I suppose, was aware it had limited infrared capabilities until the volcano erupted again in 2004 (with much more reserve than in 1980).
We casual watchers had so much fun finding “glow” at night (although the images, to say the least, were poor by today’s standards)! It was quite addicting. Fortunately, the Forest Service has put many of those early cam images online, and even made movies out of them.