Skip to contentCALCHIS
⊕earthquakeactive

M4.0 Earthquake — 195 km SE of Akutan, Alaska

M4.0
53.0500°N, 163.4520°W·US-AK
Started 14h ago
USGS data as of
Event Details
Typeearthquake
SeverityM4.0
Statusactive
Location53.0500°N, 163.4520°W (AK)
Started2026-10-21T10:46:01.943+00:00
Last Updated2026-10-22T00:55:36.425+00:00
Sourceusgs
Confidence1.00
Impact Zones — modeled
Moderate Impact Zone
Light to moderate damage. Check structures for damage.
2.5 km
Affected Zone
Shaking felt. Minor damage possible in vulnerable structures.
43.5 km

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

Impact Analysis
Population Exposed2,973
Structures in Zone1,133

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
2023 AK Earthquake50% match

M4.9 Earthquake in AK, 40km from current event

AK
2008 AK Earthquake46% match

M4.9 Earthquake in AK, 38km from current event

AK
1997 AK Earthquake43% match

M4.9 Earthquake in AK, 37km from current event

AK

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

View on Live Map
Related

Is this event approaching a location you care about?

Calchis tracks live federal event feeds against your own saved addresses and portfolios, and alerts you when a consequence zone reaches one.

Free includes Live map + 3 triggers + 10 bond positions. Analyst is $149/mo for 1,000-location portfolios, ep curves, oed export, parametric triggers.

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