⊕earthquakeactive

M5.1 Earthquake — 92 km SE of Atka, Alaska

M5.1 MODERATE

51.6040° N, 173.2484° W·US-AK

Started 2d ago

Event Details

Typeearthquake

SeverityM5.1 MODERATE

Statusactive

Location51.6040°N, 173.2484°W (US-AK)

Started2026-07-23T09:30:18.969+00:00

Last Updated2026-07-24T09:30:19.701+00:00

Sourceusgs

Source URLearthquake.usgs.gov

Confidence1.00

Impact Zones

Severe Impact Zone

Significant structural damage possible. Exercise extreme caution.

45.5 km

Moderate Impact Zone

Light to moderate damage. Check structures for damage.

78.8 km

Affected Zone

Shaking felt. Minor damage possible in vulnerable structures.

319.5 km

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

Impact Analysis

Population Exposed296,886

Structures in Zone58,608

Hospitals96

Schools673

Fire Stations385

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 historical analogs available yet.

View on Live Map

US-AK earthquake hazard profile All US hazard profiles Scoring methodology

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