SkyGround

County-level natural hazard risk data for researchers

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Petersburg Borough, AK

Population: 3,393 · FIPS code: 02195

Very Low Overall risk index: 15.4 / 100 (percentile among US counties)

Hazard breakdown

Hazard NRI rating NRI score NOAA events
(2016–2025)
Wildfire Very Low 3.4 0
Inland Flooding Very Low 1 0
Coastal Flooding No Rating 0 0
Earthquake Very Low 18.3 —
Heat Wave Insufficient Data — 0
Tornado Very Low 0.3 0

NOAA event counts are recorded county-level storm events from the NOAA Storm Events Database for 2016–2025. NOAA does not track earthquakes, and some hazard reports are filed by NWS forecast zone rather than county, so these counts are a partial, not exhaustive, record of recent activity. See the methodology page for details.

Federal disaster declaration history

Petersburg Borough has been included in 3 federal disaster declarations between 2020 and 2021, most recently for Mud/Landslide in 2021 (SEVERE STORM, FLOODING, LANDSLIDES, AND MUDSLIDES).

Source: FEMA OpenFEMA Disaster Declarations Summaries. Counts reflect county-level declaration records (a single disaster can produce more than one record per county), not modeled risk.

Geomagnetic latitude

Petersburg Borough sits at approximately 60.7°N geomagnetic latitude. Aurora can become visible on the horizon here during geomagnetic storms reaching roughly Kp 3 or higher. See current space weather conditions for live geomagnetic activity and aurora forecasts.

Geomagnetic latitude is an approximate dipole-model calculation based on this county's geographic centroid (US Census Bureau). See the methodology page for details and limitations.

What these ratings mean

Each score reflects how Petersburg Borough's expected losses from that hazard compare to every other county in the country, based on FEMA's National Risk Index. A "Very High" rating means this county is among the most exposed in the US for that hazard relative to other counties — it does not mean a disaster is likely this year. See the methodology page for how these scores are calculated.