First things first: Does Rainier really tower over the city like that? Yes and no. Photographers sometimes do bring it closer with a telephoto lens.
Here’s a slightly edited Sunday Morning Volcano post from 2014. Rifting in this region happened because of a complex series of events, called the Mid-Tertiary
That’s resuspended ash from earlier eruptions. Yes, volcanoes can still be hazardous decades after they erupt. Several weeks ago, the Alaska Volcano Observatory noted resuspended