Disaster-history hazard lens

Volcanic eruption history by county

Volcanic eruptions and associated volcanic hazards. Compare official county histories below while keeping FEMA administrative declarations separate from NOAA observed-event reports.

Data updated Aug 21, 2026 · Current conditions: Live Dashboard →

Administrative records

FEMA declaration history

Federal administrative declarations that include a county designation and map to this hazard category. A declaration is a government action, not a physical-event census.

1 county has a positive volcanic eruption count in this source.

Coverage: Jan 1, 1964 – Aug 21, 2026

Rankings compare only this source and exact coverage window. Equal counts share a rank.

Volcanic eruption fema declaration history by county
Rank	County	Unique declarations
1	King County, Washington	1

Observed-event reports

NOAA observed-event history

Distinct NOAA Storm Events records explicitly coded to a county and mapped to this hazard category. Forecast-zone and marine-zone records are excluded from county totals.

0 counties have a positive volcanic eruption count in this source.

No positive noaa observed-event history count is present for this category among the atlas county profiles.

How to interpret this hazard lens

Hazard categories normalize source labels into a shared taxonomy; source definitions and reporting practices still differ.
FEMA declarations reflect federal administrative actions and do not inventory every damaging local event.
NOAA totals include only distinct county-coded Storm Events records; forecast-zone and marine-zone records are excluded.
Only counties with a positive count for this category appear in each source table. Open a county profile for its complete source disclosures and preparedness context.