1980 Eruption of Mount St. Helens (Wikipedia)

This source backs 12 claims across the atlas. As facts: 7 well-attested, 1 scholarly debate. As cited relationships: 3 holds. Plus 1 entities citing it as a general reference with no single fact or relationship attached.

Disposition By Topic

• Phenomena, 9 claims: 4 well-attested, 1 scholarly debate, 3 holds, 1 general references.
• Sources, 3 claims: 3 well-attested.