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M6.4 Earthquake — 163 km WSW of Nikolski, Alaska

M6.4 STRONG
52.5440°N, 171.1860°W·US-AK
Started 6d ago
USGS data as of
Event Details
Typeearthquake
SeverityM6.4 STRONG
Statusactive
Location52.5440°N, 171.1860°W (AK)
Started2026-09-17T14:19:53.251+00:00
Last Updated2026-09-17T14:40:33.613+00:00
Sourceusgs
Source URLearthquake.usgs.gov
Confidence1.00
Impact Zones
Moderate Impact Zone
Light to moderate damage. Check structures for damage.
104.0 km
Affected Zone
Shaking felt. Minor damage possible in vulnerable structures.
397.6 km

Zone estimates are based on scientific models and may differ from actual local conditions.

Impact Analysis
Population Exposed234,729
Structures in Zone88,126
Schools1
Fire Stations1

Population from ACS 5-Year 2022 tract sampling; structure counts from Microsoft Building Footprints or Census ACS housing data, capped by USGS NLCD 2021 developed land. Estimates for situational awareness — not for actuarial, regulatory, or underwriting use.

Historical Comparison

No comparable events in the catalogue near this location. The catalogue holds NOAA Storm Events from 1950, IBTrACS tracks from 1842 and NIFC perimeters from 1984.

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Related
US-AK earthquake hazard profileAll US hazard profilesScoring methodology

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Zone estimates are based on scientific models and may differ from actual local conditions.