Overall Green Earthquake alert in United States on 20 Dec 2022 10:34 UTC

GDACS is a cooperation framework between the United Nations, the European Commission and disaster managers worldwide to improve alerts, information exchange and coordination in the first phase after major sudden-onset disasters.

M 6.08 in United States on 20 Dec 2022 10:34 UTC

Hazard models

Rapid Impact

Shakemap

Tsunami

Event summary

This earthquake is expected to have a low humanitarian impact based on the magnitude and the affected population and their vulnerability.

Earthquake Magnitude:	6.1M
Depth:	16.06 Km
Lat/Lon:	40.5233345 , -124.3933334
Event Date:	20 Dec 2022 10:34 UTC 20 Dec 2022 02:34 Local
Exposed Population:	2 thousand (in MMI>=VII)
Source:	NCAL SS nc73821036
Inserted at:	20 Dec 2022 10:38 UTC
INFORM Coping capacity of the alert score	2.2 (United States)

GDACS Score

For more info on GDACS alert score click here.

	Earthquake (Rapid Impact)		GDACS score
NCAL SS	0.2		0.2
nc73821036	Scaled population (vector)	1.97
	C1 rapid impact	-0.59
	C2 rapid impact	0.53
	Country Vulnerability	0
	INFORM_normalised	0.65

Maximum expected impact using different data sources.

Episode Timeline

ID	Alert	Score	Date	Mag, Depth	MMI*	Population**	Tsunami risk***	Delay (hh:mm)	Source
1479670		0.2	20 Dec 2022 10:34	6.08M, 16.06km	6.81	2 thousand (in 100km)		00:04	NCAL SS
1479672		0.9	20 Dec 2022 10:34	6.37M, 16.06km	7.76	80 thousand (in MMI>=VII)	0.1m (at 00:55)	00:06	NCAL SS

The episode that generated the alert; the next major evaluations beyond 12 hours will not trigger additional alerts.

The episode that has the last updated information.

* The max MMI detected for sources having shakemaps;
** The population detected in MMI>=7 for episode with shakemap or in a 100km radius;
*** The tsunami max height.

Exposed population

The earthquake happened in United States , State of California (population 22,305) . The nearest places are Capetown, Port Kenyon, Ferndale, Arlynda Corners, Waddington, Fernbridge, Hacketsville, Loleta, Metropolitan, Alton, and Blocksburg.

Radius	Population
100 km	140000 people
75 km	130000 people
50 km	99000 people
20 km	3900 people
10 km	<1000 people
5 km	<1000 people
2 km	no people

Affected Provinces

Region Province	Country	Population
California	United States	22000 people

Affected populated places

Name	Region Province	Country	City class	Population	Distance
Capetown	California	United States	Village	-	6 km
Port Kenyon	California	United States	Village	-	12 km
Ferndale	California	United States	Village	1400 people	13 km
Arlynda Corners	California	United States	Village	-	14 km
Waddington	California	United States	Village	-	17 km
Fernbridge	California	United States	Village	-	19 km
Hacketsville	California	United States	Village	-	19 km
Loleta	California	United States	Village	-	20 km
Metropolitan	California	United States	Village	-	21 km
Alton	California	United States	Village	-	22 km
Rohnerville	California	United States	Village	-	22 km
Fortuna	California	United States	Village	10000 people	23 km
Southport Landing	California	United States	Village	-	23 km
Beatrice	California	United States	Village	-	23 km
Belleview	California	United States	Village	-	23 km
Petrolia	California	United States	Village	-	24 km
Newburg	California	United States	Village	-	24 km
Scotia	California	United States	Village	-	25 km
Rio Dell	California	United States	Village	3200 people	26 km
Hydesville	California	United States	Village	1200 people	26 km
Fields Landing	California	United States	Village	-	27 km
Carlotta	California	United States	Village	-	28 km
Humboldt Hill	California	United States	Village	3200 people	28 km
Stafford	California	United States	Village	-	29 km
Spruce Point	California	United States	Village	-	29 km
Elk River	California	United States	Village	-	30 km
Pine Hills	California	United States	Village	3100 people	31 km
Bayview	California	United States	Village	2400 people	33 km
Elinor	California	United States	Village	-	33 km
Fairhaven	California	United States	Village	-	34 km
Riverside Park	California	United States	Village	-	34 km
Cutten	California	United States	Village	2900 people	34 km
Pepperwood	California	United States	Village	-	35 km
Eureka	California	United States	City	26000 people	36 km
Myrtletown	California	United States	Village	4500 people	37 km
Samoa	California	United States	Village	-	37 km
Freshwater	California	United States	Village	-	39 km
Honeydew	California	United States	Village	-	39 km
Shively	California	United States	Village	-	39 km
Redcrest	California	United States	Village	-	40 km
Brainard	California	United States	Village	-	40 km
Holmes	California	United States	Village	-	40 km
Manila	California	United States	Village	-	41 km
Larabee	California	United States	Village	-	42 km
Indianola	California	United States	Village	-	42 km
Kneeland	California	United States	Village	-	43 km
The Springs	California	United States	Village	-	43 km
Bayside	California	United States	Village	-	45 km
South Fork	California	United States	Village	-	45 km
Westlund Place	California	United States	Village	-	45 km
Lone Star Junction	California	United States	Village	-	45 km
Weott	California	United States	Village	-	46 km
Sunny Brae	California	United States	Village	-	46 km
Scott Place	California	United States	Village	-	47 km
Camp Grant	California	United States	Village	-	47 km
Arcata	California	United States	City	17000 people	47 km
Burlington	California	United States	Village	-	47 km
Maple Grove	California	United States	Village	-	48 km
Yager	California	United States	Village	-	48 km
Fickle Hill	California	United States	Village	-	48 km
Alliance	California	United States	Village	-	48 km
Tyee City	California	United States	Village	-	50 km
Hunter Place	California	United States	Village	-	50 km
Korblex	California	United States	Village	-	51 km
Maple Creek	California	United States	Village	-	52 km
Bridgeville	California	United States	Village	-	52 km
Calville	California	United States	Village	-	52 km
McCann	California	United States	Village	-	52 km
Myers Flat	California	United States	Village	-	52 km
Glendale	California	United States	Village	-	53 km
McKinleyville	California	United States	Village	14000 people	53 km
Korbel	California	United States	Village	-	53 km
Blue Lake	California	United States	Village	1100 people	53 km
Ettersburg	California	United States	Village	-	55 km
Fruitland	California	United States	Village	-	55 km
Whitlow	California	United States	Village	-	56 km
Clam Beach	California	United States	Village	-	58 km
Fieldbrook	California	United States	Village	-	58 km
Miranda	California	United States	Village	-	58 km
Dinsmores	California	United States	Village	-	60 km
Fernwood	California	United States	Village	-	60 km
Crannell	California	United States	Village	-	60 km
Westhaven	California	United States	Village	-	62 km
Eel Rock	California	United States	Village	-	62 km
Shelter Cove	California	United States	Village	-	62 km
Phillipsville	California	United States	Village	-	62 km
Briceland	California	United States	Village	-	62 km
Thorn Junction	California	United States	Village	-	63 km
Janes Place	California	United States	Village	-	64 km
Trinidad	California	United States	Village	<1000 people	65 km
Brock Creek	California	United States	Village	-	65 km
Dinsmores	California	United States	Village	-	67 km
Whitethorn	California	United States	Village	-	67 km
Pepperwood Springs	California	United States	Village	-	69 km
Redway	California	United States	Village	1200 people	69 km
Garberville	California	United States	Village	-	69 km
Patricks Point	California	United States	Village	-	70 km
Blocksburg	California	United States	Village	-	70 km

see full list

Critical infrastructure

Airports, ports, nuclear plants and hydrodams at risk, if affected, are listed below.

Airports

Name	IATA Code	Elevation (m)	Usage	Runway type	IFR	Runway Length (ft)	Distance
Rohnerville		119	Civ.	Paved	Yes	4000	22 km
Eureka Municipal		6				0	32 km
Murray Field	EKA	2	Civ.	Paved	Yes	3000	39 km
Kneeland		834				0	45 km
Arcata	ACV	66	Civ.	Paved	Yes	5900	56 km
Shelter Cove		21				0	61 km
Dinsmore		724				0	67 km
Garberville		166				0	69 km
Hyampom		381				0	79 km
Hoopa		109				0	84 km
Hell'er High Water		760				0	95 km
Ruth		843				0	99 km
Silver Creek Ranch		765				0	99 km

Ports

Name	LOCODE	Country	Distance
Cape Mendocino		Wake Island	12 km
Fields Landing		Wake Island	26 km
Eureka	USEKA	Wake Island	35 km

Dams

Reservoir	Dam Name	River	Year	Distance
Ruth Lake	Robert W. Matthews	Mad River	1962	83 km

Nuclear plants

Name	Country	Reactors	Distance
HUMBOLDT BAY	UNITED STATES	1	29 km

More information

For a full list of available products related to this event, please refer to the GDACS Resources page.

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