Overall Orange Earthquake alert in United States on 29 Jul 2021 06:15 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 8.2 Earthquake and Tsunami (2.6 m) in United States on 29 Jul 2021 06:15 UTC

Hazard models

EQ parameters

Shakemap

Tsunami

Event summary

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

Earthquake Magnitude:	8.2M
Depth:	32.2 Km
Lat/Lon:	55.3248 , -157.8414
Event Date:	29 Jul 2021 06:15 UTC 28 Jul 2021 19:15 Local
Exposed Population:	About 1000 people in MMI No people within 100km
Source:	ALASKA EC ak0219neiszm
Inserted at:	29 Jul 2021 07:56 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)		Tsunami		GDACS score
ALASKA EC	0.2		1.8		1.8
ak0219neiszm	Scaled population (raster)	0	Max wave alert	0m
	C1 shakemap	-0.59	Max wave realtime	2.63m
	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	Score	Date	Mag, Depth	MMI*	Population**	Tsunami risk***	Delay (hh:mm)	Source
1387963	0.2	29 Jul 2021 06:15	7.2M, 35km	N/A	No people affected (in 100km)	0.3m (at 00:54)	00:08	ALASKA EC
1387964	0.5	29 Jul 2021 06:15	7.3M, 3.4km	5.28	N/A (in MMI>=VII)	0.5m (at 01:06)	00:19	ALASKA EC
1387970	0.6	29 Jul 2021 06:15	7.3M, 5.5km	N/A	No people affected (in 100km)	0.6m (at 00:54)	00:24	ALASKA EC
1387980	1.7	29 Jul 2021 06:15	8.2M, 46.66km	6.42	N/A (in MMI>=VII)	2.4m (at 00:50)	00:35	NEIC
1388004	1.8	29 Jul 2021 06:15	8.2M, 32.2km	7.55	1 thousand (in MMI>=VII)	2.6m (at 00:50)	01:40	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. The alertlevel for this event is GREEN

Intensity	Population
	<1000 people

Shakemaps Timeline

Shake id #	Score	episodeid	Lat/Lon	Magnitude	Depth	Max MMI	Date shake (UTC)	Delay (hh:mm)
1	0	1387970	55.315/-157.829	7.2	35.0	5.284	29 Jul 2021 06:26	00:10	(new episode)
2	0	1387980	55.325/-157.841	8.2	32.2	6.418	29 Jul 2021 07:07	00:51	(new episode)
3	0	1388004	55.325/-157.841	8.2	32.2	6.464	29 Jul 2021 08:24	02:09	(new episode)
4	0.2	1388004	55.452/-157.964	8.2	28.8	7.546	29 Jul 2021 16:11	09:55	(upd of #3)
5	0.2	1388004	55.452/-157.964	8.2	28.8	7.546	30 Jul 2021 06:23	1d 00:07	(upd of #4)

Affected Provinces

Intensity	Region Province	Country	Population
	Alaska	United States	<1000 people
	Alaska	United States	2100 people

Affected populated places. Areas of interest

Name	Region Province	Country	City class	Population	Distance
Mitrofania	Alaska	United States	Village	-	94 km
Village	Alaska	United States	Village	-	152 km
Unga	Alaska	United States	Village	-	171 km
Squaw Harbor	Alaska	United States	Village	-	173 km
Ilnik	Alaska	United States	Village	-	182 km
Meshik	Alaska	United States	Village	-	186 km
Herendeen Bay	Alaska	United States	Village	-	187 km
Port Moller	Alaska	United States	Village	-	189 km
Bear River	Alaska	United States	Village	-	190 km
Belkofski	Alaska	United States	Village	-	269 km
Kanatak	Alaska	United States	Village	-	274 km
Ayakulik	Alaska	United States	Village	-	293 km
Kaguyak	Alaska	United States	Village	-	305 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
Perryville		7				0	107 km
Chignik Bay	KBW	unknown				0	116 km
Chignik Fisheries	KCG	8				0	117 km
Chignik Lagoon	KCL	15				0	120 km
Chignik Lake		15				0	122 km
Ivanof Bay	KIB	unknown				0	123 km
Sand Point	SDP	6	Civ.	Paved	Yes	4000	171 km
Johnsons Landing		40				0	174 km
Squaw Harbor		unknown				0	174 km
Port Moller	PML	unknown				0	189 km
Port Heiden	PTH	29	Civ.	Unpaved	Yes	6200	190 km
Herendeen Bay		6				0	201 km
Nelson Lagoon	NLG	4				0	224 km
Ugashik Bay	UGB	40				0	248 km
Ugashik/new	UGS	8				0	249 km
Pilot Point	PIP	17				0	254 km
Big Creek	BIC	unknown				0	263 km
Sitkinak	SKJ	unknown				0	268 km
King Cove	KVC	47				0	283 km
Bear Creek	BCC	unknown				0	284 km
Alitak	ALZ	unknown				0	284 km
Akhiok	AKK	13				0	290 km
Fort Jensen		73				0	291 km
Moser Bay	KMY	unknown				0	298 km
Cold Bay	CDB	30	Civ.	Paved	Yes	10400	311 km
Blinn Lake		15				0	313 km
Egegik	EGX	26	Civ.	Unpaved	No	3000	322 km
Bartletts		15				0	325 km
Pauloff Harbor	KPH	unknown				0	326 km

Ports

Name	LOCODE	Country	Distance
Perryville	USPYX	Wake Island	106 km
Chignik		Wake Island	116 km
Ivanof Bay		Wake Island	117 km
Chirikof Island		Wake Island	156 km
Unga		Wake Island	171 km
Baralof Bay		Wake Island	172 km
Sand Point		Wake Island	173 km
Port Heiden		Wake Island	183 km
Port Moller		Wake Island	188 km
Ugashik		Wake Island	250 km
Pilot Point		Wake Island	253 km
Belkofski		Wake Island	269 km
Kanatak		Wake Island	275 km
Lazy Bay		Wake Island	284 km
King Cove		Wake Island	287 km
Karluk		Wake Island	294 km
Trap Point		Wake Island	296 km
Cold Bay		Wake Island	310 km
Egegik		Wake Island	325 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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