⊕earthquakeactive

M3.1 Earthquake — 80 km WNW of Ferndale, CA

M3.1

40.8810°N, 125.1302°W·US-CA

Started 1d ago

USGS data as of 03:55 UTC

Event Details

Typeearthquake

SeverityM3.1

Statusactive

Location40.8810°N, 125.1302°W (CA)

Started2026-10-20T07:39:03.4+00:00

Last Updated2026-10-21T07:35:37.416+00:00

Sourceusgs

Source URLearthquake.usgs.gov

Confidence1.00

Impact Zones — modeled

Catastrophic Impact Zone

Severe structural damage expected. Immediate danger to life.

0.3 km

Severe Impact Zone

Significant structural damage possible. Exercise extreme caution.

0.9 km

Moderate Impact Zone

Light to moderate damage. Check structures for damage.

1.8 km

Affected Zone

Shaking felt. Minor damage possible in vulnerable structures.

3.5 km

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

Impact Analysis

Population Exposed3,876

Structures in Zone1,088

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 CA Earthquake47% match

M4.05 Earthquake in CA, 43km from current event

2023 CA Earthquake45% match

M4.03 Earthquake in CA, 53km from current event

1999 CA Earthquake45% match

M4.1 Earthquake in CA, 22km from current event

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

View on Live Map

All US hazard profiles Scoring methodology

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