Overall Green Earthquake alert in United States on 31 Aug 2021 17:21 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 4.7 in United States on 31 Aug 2021 17:21 UTC

Hazard models

EQ parameters

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:	4.7M
Depth:	8.68 Km
Lat/Lon:	40.9205 , -114.9459
Event Date:	31 Aug 2021 17:21 UTC 31 Aug 2021 10:21 Local
Exposed Population:	Less then 100 people in MMI VI 50 thousand in 100km
Source:	NEIC us7000f6a0
Inserted at:	31 Aug 2021 18:03 UTC
INFORM Coping capacity of the alert score	2.2 (United States)

GDACS Score

For more info on GDACS alert score click here.

	Earthquake (Shakemap)		GDACS score
NEIC	0		0
us7000f6a0	Scaled population (raster)	0
	C1 shakemap	-0.59
	C2 shakemap	0.53
	Country Vulnerability	0
	INFORM_normalised	0.65

Maximum expected impact using different data sources.

Episode Timeline

ID	Date	Mag, Depth	MMI*	Population**	Delay (hh:mm)	Source
1394659	31 Aug 2021 17:21	4.6M, 14.13km	4.77	N/A (in MMI>=VII)	00:18	NEIC
1394660	31 Aug 2021 17:21	5.4M, 5km	4.77	N/A (in MMI>=VII)	00:24	U NEV
1394662	31 Aug 2021 17:21	4.7M, 8.68km	5.67	N/A (in MMI>=VII)	00:42	NEIC

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 Nevada (population 1,250,752) . The nearest places are Ventosa, Wells, Welcome, Moor, Alazon, Arthur, Tulasco, Spruce, Deeth, Holborn, and Shores.

Radius	Population
100 km	48000 people
75 km	40000 people
50 km	2100 people
20 km	<1000 people
10 km	<1000 people
5 km	<1000 people
2 km	no people

Affected Provinces

Region Province	Country	Population
Nevada	United States	1.3 million people

Affected populated places

Name	Region Province	Country	City class	Population	Distance
Ventosa	Nevada	United States	Village	-	14 km
Wells	Nevada	United States	Village	1300 people	22 km
Welcome	Nevada	United States	Village	-	24 km
Moor	Nevada	United States	Village	-	24 km
Alazon	Nevada	United States	Village	-	25 km
Arthur	Nevada	United States	Village	-	25 km
Tulasco	Nevada	United States	Village	-	28 km
Spruce	Nevada	United States	Village	-	28 km
Deeth	Nevada	United States	Village	-	32 km
Holborn	Nevada	United States	Village	-	35 km
Hogan	Nevada	United States	Village	-	35 km
Metropolis	Nevada	United States	Village	-	35 km
Sage	Nevada	United States	Village	-	38 km
Fenelon	Nevada	United States	Village	-	39 km
Oasis	Nevada	United States	Village	-	41 km
Melandco	Nevada	United States	Village	-	41 km
Sprucemont	Nevada	United States	Village	-	42 km
Halleck	Nevada	United States	Village	-	43 km
Shafter	Nevada	United States	Village	-	43 km
Pequop	Nevada	United States	Village	-	45 km
Elburz	Nevada	United States	Village	-	47 km
Decoy	Nevada	United States	Village	-	48 km
Lamoille	Nevada	United States	Village	-	49 km
Valley Pass	Nevada	United States	Village	-	49 km
Silver Zone	Nevada	United States	Village	-	50 km
Cobre	Nevada	United States	Village	-	50 km
Dolly Varden	Nevada	United States	Village	-	54 km
Clifside	Nevada	United States	Village	-	56 km
Proctor	Nevada	United States	Village	-	57 km
Ruby Valley	Nevada	United States	Village	-	57 km
Brennen Ranch	Nevada	United States	Village	-	58 km
Loray	Nevada	United States	Village	-	58 km
Wilkins	Nevada	United States	Village	-	59 km
Osino	Nevada	United States	Village	-	60 km
Pilot	Nevada	United States	Village	-	61 km
Schoer Place	Nevada	United States	Village	-	62 km
Spring Creek	Nevada	United States	Village	11000 people	62 km
Mizpah	Nevada	United States	Village	-	63 km
Coin	Nevada	United States	Village	-	65 km
Rock House	Nevada	United States	Village	-	68 km
Lee	Nevada	United States	Village	-	68 km
Elko	Nevada	United States	City	17000 people	69 km
Shores	Nevada	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
Harriet Field	LWL	1759	Civ.	Paved	No	5500	22 km
Marys River Ranch		1707				0	51 km
Elko Municipal J C Harris Field	EKO	1565	Civ.	Paved	Yes	7200	72 km
Currie		1798				0	72 km
Pilot Creek Ranches		1518				0	73 km
Juniper		1646				0	77 km
Wendover	ENV	1292	Civ.	Paved	Yes	8000	80 km

Dams

Reservoir	Dam Name	River	Year	Distance
	South Fork	South Fork of Humboldt River	1988	75 km
	Jerritt Canyon Tailings Dam	Offstream North Fork of Humboldt River	1981	96 km

More information

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

Disclaimer
While we try everything to ensure accuracy, this information is purely indicative and should not be used for any decision making without alternate sources of information.
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