⊕earthquakeactive

M4.3 Earthquake — 7 km NNW of Geyserville, California

M4.3

38.7699° N, 122.9241° W·US-CA

Started 3h ago

Event Details

Typeearthquake

SeverityM4.3

Statusactive

Location38.7699°N, 122.9241°W (US-CA)

Started2026-07-29T02:40:06+00:00

Last Updated2026-07-29T02:42:30.646586+00:00

Sourceusgs

Source URLearthquake.usgs.gov

Confidence1.00

Impact Zones

Catastrophic Impact Zone

Severe structural damage expected. Immediate danger to life.

1.4 km

Severe Impact Zone

Significant structural damage possible. Exercise extreme caution.

3.5 km

Moderate Impact Zone

Light to moderate damage. Check structures for damage.

7.1 km

Affected Zone

Shaking felt. Minor damage possible in vulnerable structures.

14.1 km

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

Impact Analysis

Population Exposed256,562

Structures in Zone3,718

Hospitals1

Schools4

Fire Stations2

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.

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

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