December M 6.4 Earthquake + Aftershocks Incident Resource Page (archived)

Dec 20 M 6.4 Earthquake, Humboldt County

Page Last Updated: December 20, 2022

Information per USGS
Mainshock: December 20, 2022 at 2:34am pacific time, 15km (9.3 miles) WSW of Ferndale, CA


Map on the right shows recent earthquakes with estimated shaking intensity. Events are updated as frequently as every 5 minutes. Events over the with magnitude 4.5 or above within the last 30 days are shown. Events with a magnitude less than 4.5 are retained for 7 days on the map. (source ESRI Recent Earthquakes Map)

Latitude / Longitude Used: 40.525000, -124.423000 (epicenter)

50 Miles Radius Zip Codes: 95536, 95551, 95562, 95540, 95547, 95537, 95558, 95503, 95564, 95534, 95565, 95545, 95501, 95528, 95502, 95524, 95549, 95518, 95521, 95571, 95569, 95554, 95550, 95553, 95519, 95542, 95560, 95525, 95589, 95559, 95526, 95514, 95570, 95511, 95563, 96046

50 Miles Radius Towns/Cities: Ferndale, Loleta, Rio Dell, Fortuna, Hydesville, Fields Landing, Petrolia, Eureka, Samoa, Cutten, Scotia, Honeydew, Carlotta, Bayside, Kneeland, Arcata, Weott, Redcrest, Myers Flat, Korbel, Miranda, Mckinleyville, Garberville, Redway, Blue Lake, Whitethorn, Phillipsville, Bridgeville, Blocksburg, Trinidad, Alderpoint, Salyer, Hyampom

Zip Code & Town/City information pulled from FreeMapTools – Find ZIP Codes Inside a Radius

General Information

USGS Latest Earthquake – Past 1 Day

USGS Latest Earthquake – Past 7 Days

December 20 M 6.4 Earthquake Links: Overview      Interactive Map      PAGER      Ground Failure      Aftershock Forecast

Humboldt County Current Emergency Response Page

Earthquake Engineering Research Institute’s – Ferndale California Earthquake Clearinghouse Site

Humboldt County Economic Impacts & Recovery

Residents are encouraged to report earthquake damages to the Humboldt County Office of Emergency Services via their damage report form.

Additional County Information Links are towards the bottom with the social media feeds

Evacuation & Shelter Information

Humboldt Area Foundation and Wild Rivers Community Foundation’s Disaster Response and Resilience Fund – The foundation serves the impacted Humboldt and the surrounding areas, including Fortuna, Ferndale, Loleta, Rio Dell, Bear River Rancheria, and Wiyot Tribe.

League of California Community Foundations’ Disaster Relief, Recovery, and Resilience Fund – the purpose of this fund is to provide a centralized opportunity for funders to invest in disaster relief, recovery and resilience through community foundations – trusted intermediaries who are deeply connected to affected communities.

The Humboldt County Sheriff’s Office of Emergency Services is not currently accepting material donations. T

Proclamations & Moratoriums

December 20, 2022 Governor Newsom proclaimed a State of Emergency for Humboldt County.

December 20, 2022 Humboldt County declares a local State of Emergency.


Average Number of Persons per Household (2017-2021):
Humboldt County: 2.48          Fortuna, CA: 2.52          State average: 2.92

Humboldt County Percent of Persons:
Under 5 Years: 4.9%      Under 18 Years: 18.9%     Over 65 Years: 19.2%

Fortuna, CA Percent of Persons:
Under 5 Years: 5.6%      Under 18 Years: 22.7%     Over 65 Years: 15.9%

Owner-occupied housing unit rate (2017-2021):
Humboldt County: 57.6%        Fortuna, CA: 58.5%        State average: 55.5%

Data from US Census Bureau (2021 data)
Note – unless otherwise noted, these are county demographics and local conditions may differ some.

Power & Gas Humboldt County Outage List – This site provides aggregates live power outage data, though may not include some of the smaller local utilities.

PG&E Outage Map


For the status of water systems, see the Humboldt County OES Current Emergencies page.


National Weather Service Watches, Warnings, and Advisories

RSS Humboldt County

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County Links & Social Media Feeds

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