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M4.5 Earthquake — 158 km S of False Pass, Alaska

M4.5
53.4261°N, 163.4612°W·US-AK
Started 12h ago
USGS data as of
Event Details
Typeearthquake
SeverityM4.5
Statusactive
Location53.4261°N, 163.4612°W (AK)
Started2026-10-21T12:03:56.497+00:00
Last Updated2026-10-22T00:55:36.201+00:00
Sourceusgs
Source URLearthquake.usgs.gov
Confidence1.00
Impact Zones — modeled
Moderate Impact Zone
Light to moderate damage. Check structures for damage.
9.5 km
Affected Zone
Shaking felt. Minor damage possible in vulnerable structures.
81.6 km

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

Impact Analysis
Population Exposed10,459
Structures in Zone3,984

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
1999 AK Earthquake54% match

M5.3 Earthquake in AK, 18km from current event

AK
2018 AK Earthquake53% match

M5.5 Earthquake in AK, 13km from current event

AK
2008 AK Earthquake53% match

M5.3 Earthquake in AK, 29km 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.