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.

ShakeMap is a product of the USGS Earthquake Hazards Program in conjunction with the regional seismic networks. ShakeMaps provide near-real-time maps of ground motion and shaking intensity following significant earthquakes.

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 ,of Nevada (population 17) . The alertlevel for this event is GREEN

Intensity	Population
	<1000 people
	<1000 people

Shakemaps Timeline

Shake id #	episodeid	Lat/Lon	Magnitude	Depth	Max MMI	Date shake (UTC)	Delay (hh:mm)
1	1394662	40.904/-114.95	4.6	14.1	4.77	31 Aug 2021 17:44	00:22	(new episode)
2	1394662	40.92/-114.946	4.7	8.7	5.704	31 Aug 2021 18:53	01:32	(upd of #1)
3	1394662	40.92/-114.946	4.7	8.7	5.705	31 Aug 2021 19:26	02:04	(upd of #2)
4	1394662	40.92/-114.946	4.7	8.7	5.685	31 Aug 2021 20:23	03:01	(upd of #3)
5	1394662	40.92/-114.946	4.7	8.7	5.674	31 Aug 2021 21:58	04:37	(upd of #4)
6	1394662	40.92/-114.946	4.7	8.7	5.674	31 Aug 2021 23:04	05:43	(upd of #5)
7	1394662	40.92/-114.946	4.7	8.7	5.649	01 Sep 2021 02:45	09:23	(upd of #6)
8	1394662	40.92/-114.946	4.7	8.7	5.668	01 Sep 2021 17:26	1d 00:04	(upd of #7)

Affected Provinces

Intensity	Region Province	Country	Population
	Nevada	United States	<1000 people
	Nevada	United States	1600 people

Affected populated places. Areas of interest

Name	Region Province	Country	City class	Population	Distance
Wells	Nevada	United States	Village	1300 people	22 km
Arthur	Nevada	United States	Village	-	25 km
Deeth	Nevada	United States	Village	-	32 km
Halleck	Nevada	United States	Village	-	43 km
Shafter	Nevada	United States	Village	-	43 km

see full list

Critical infrastructure

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

Airports

Intensity	Name	IATA Code	Elevation (m)	Usage	Runway type	IFR	Runway Length (ft)	Distance
	Harriet Field	LWL	1759	Civ.	Paved	No	5500	22 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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