Overall Green Earthquake alert in United States on 08 Apr 2023 20:25 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 5.1 in United States on 08 Apr 2023 20:25 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:	5.1M
Depth:	66.396 Km
Lat/Lon:	53.9099 , -165.4573
Event Date:	08 Apr 2023 20:25 UTC 08 Apr 2023 12:25 Local
Exposed Population:	4 thousand in MMI IV
Source:	NEIC us6000k2wm
Inserted at:	08 Apr 2023 20:42 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
us6000k2wm	Scaled population (raster)	0
	C1 shakemap	0
	C2 shakemap	0
	Country Vulnerability	0
	INFORM_normalised	0

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
1499618	08 Apr 2023 20:25	5M, 60km	3.63	N/A (in MMI>=VII)	00:08	NTWC
1499621	08 Apr 2023 20:25	4.9M, 36.1km	3.03	6 thousand (in 100km)	00:13	ALASKA EC
1499623	08 Apr 2023 20:25	5.1M, 66.396km	3.6	N/A (in MMI>=VII)	00:16	NEIC
1500442	08 Apr 2023 20:25	5.1M, 56.2km	3.75	3 thousand (in 100km)	5d 05:42	ALASKA EC
1500562	08 Apr 2023 20:25	5.1M, 65.5km	3.66	N/A (in MMI>=VII)	6d 01:39	ALASKA EC

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 Alaska (population 572,432) . The alertlevel for this event is GREEN

Intensity	Population
	no people

Shakemaps Timeline

Shake id #	episodeid	Lat/Lon	Magnitude	Depth	Max MMI	Date shake (UTC)	Delay (hh:mm)
1	1499618	-165.466/53.938	4.8	59.3	3.63	08 Apr 2023 20:33	00:08	(new episode)
2	1499623	-165.278/53.719	4.9	36.1	3.091	08 Apr 2023 20:43	00:18	(new episode)
3	1499623	-165.278/53.719	5.1	36.1	3.588	08 Apr 2023 20:46	00:21	(upd of #2)
4	1499623	-165.278/53.719	5.1	36.1	3.621	08 Apr 2023 20:51	00:26	(upd of #3)
5	1499623	-165.278/53.719	5.1	36.1	3.6	13 Apr 2023 23:51	5d 03:25	(upd of #4)
6	1500562	-165.468/53.911	5.1	65.5	3.662	14 Apr 2023 23:50	6d 03:25	(new episode)

Affected Provinces

Region Province	Country	Population
Alaska	United States	no people
Alaska	United States	1900 people
Alaska	United States	<1000 people

Affected populated places. Areas of interest

Name	Region Province	Country	City class	Population	Distance
Biorka	Alaska	United States	Village	-	50 km
Unalaska	Alaska	United States	Village	4300 people	71 km
Dutch Harbor	Alaska	United States	Village	-	71 km
Makushin	Alaska	United States	Village	-	102 km
Kashega	Alaska	United States	Village	-	122 km
Chernofski	Alaska	United States	Village	-	149 km
Ikatan	Alaska	United States	Village	-	168 km
Morzhovoi	Alaska	United States	Village	-	178 km
Sanak	Alaska	United States	Village	-	184 km
Pauloff Harbor	Alaska	United States	Village	-	189 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
Akutan	KQA	unknown				0	33 km
Lost Harbor Sea Port	LHB	unknown				0	37 km
Beaver Inlet Sea Port	BVD	unknown				0	60 km
Unalaska - Emergency Field	DUT	7	Civ.	Paved	Yes	3900	71 km
Cape Sarichef	CSH	89	Civ.	Unpaved	No	3500	83 km
Driftwood Bay	DFB	unknown				0	92 km
Chernofski Harbor	KCN	unknown				0	149 km
False Pass	KFP	6				0	169 km
Umnak Island	UMB	unknown				0	172 km
Pauloff Harbor	KPH	unknown				0	190 km

Ports

Name	LOCODE	Country	Distance
Akutan	USAKU	Wake Island	33 km
Unalaska	USUAA	Wake Island	70 km
Dutch Harbor	USDUT	Wake Island	72 km
Cannery Bay		Wake Island	88 km
Unimak		Wake Island	89 km
Makushin		Wake Island	102 km
Sanak Island		Wake Island	183 km
Fort Randal		Wake Island	202 km

More information

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

Disclaimer
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