This great continental arc volcano erupted spectacularly on May 18, 1980 (https://en.wikipedia.org/wiki/Mount_St.Helens), leaving a wide region of destruction from the flank collapse landslide, pyroclastic flows, and lahars.
This model was produced using a 1/3 arcsecond DEM (USGS) and Sentinel cloud-free imagery (EOX IT Services GmbH), using the open-source script tectoplot (https://github.com/kyleedwardbradley/tectoplot.
The command used was
tectoplot -r -122.31 -122.06 46.12 46.30 -t ~/Downloads/USGS_13_n47w123_20210615.tif -pgs 0.5 -t0 -tgam 0.5 -tshad 45 5 -tsent 0.1 -makeply topoexag 1 maxsize 1000 sidebox 2 lightgray