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M3.3 Earthquake — 180 km W of Nikolski, Alaska

M3.3
53.1870°N, 171.5200°W·US-AK
Started 1d ago
USGS data as of
Event Details
Typeearthquake
SeverityM3.3
Statusactive
Location53.1870°N, 171.5200°W (AK)
Started2026-10-20T23:35:40.405+00:00
Last Updated2026-10-21T23:35:38.045+00:00
Sourceusgs
Source URLearthquake.usgs.gov
Confidence1.00
Impact Zones — modeled
Affected Zone
Shaking felt. Minor damage possible in vulnerable structures.
17.9 km

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

Impact Analysis
Population Exposed503
Structures in Zone192

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
2009 AK Earthquake46% match

M4.3 Earthquake in AK, 27km from current event

AK
2023 AK Earthquake45% match

M4.3 Earthquake in AK, 45km from current event

AK
2015 AK Earthquake44% match

M4.3 Earthquake in AK, 37km from current event

AK

Historical comparison based on peril type, geography, and severity. Past events do not predict future outcomes.

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