Source
Mount St. Helens (USGS volcano profile)
U.S. Geological Survey (n.d.). Mount St. Helens (USGS volcano profile). https://www.usgs.gov/volcanoes/mount-st-helens Retrieved 2026-09-06.
- Authority tier
- Primary authority
- Type
- webPage
- Licence
- Public domain (work of the U.S. Government)
- Retrieved by Lithoen
- 2026-09-06
- Last re-checked
- 2026-09-06 (verified)
Known metadata gaps
Recorded explicitly rather than guessed.
- publishedYear: a continuously updated monitoring profile with no fixed publication date.