Overall Orange Earthquake alert in United States from 29 Jul 2021 06:15 UTC to 06:15

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 in United States from 29 Jul 2021 06:15 UTC to 06:15

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:	46.66 Km
Lat/Lon:	55.4742 , -157.9173
Event Date:	29 Jul 2021 06:15 UTC 28 Jul 2021 19:15 Local
Exposed Population:	Less then 100 people in MMI VI About 400 people within 100km
Source:	NEIC us6000f02w
Inserted at:	29 Jul 2021 06:51 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
NEIC	0		0		1.7
us6000f02w	Scaled population (raster)	0	Max wave alert	0m
	C1 shakemap	-0.59	Max wave realtime	2.4m
	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
	1500 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

Region Province	Country	Population
Alaska	United States	no people
Alaska	United States	<1000 people
Alaska	United States	<1000 people
Alaska	United States	19000 people

Affected populated places. Areas of interest

Name	Region Province	Country	City class	Population	Distance
Mitrofania	Alaska	United States	Village	-	76 km
Village	Alaska	United States	Village	-	146 km
Ilnik	Alaska	United States	Village	-	164 km
Meshik	Alaska	United States	Village	-	167 km
Unga	Alaska	United States	Village	-	167 km
Squaw Harbor	Alaska	United States	Village	-	169 km
Bear River	Alaska	United States	Village	-	176 km
Port Moller	Alaska	United States	Village	-	176 km
Herendeen Bay	Alaska	United States	Village	-	177 km
Kanatak	Alaska	United States	Village	-	260 km
Belkofski	Alaska	United States	Village	-	265 km
Ayakulik	Alaska	United States	Village	-	284 km
Kaguyak	Alaska	United States	Village	-	300 km
Pauloff Harbor	Alaska	United States	Village	-	327 km
Nunamiut	Alaska	United States	Village	-	328 km
Sanak	Alaska	United States	Village	-	332 km
Uyak	Alaska	United States	Village	-	341 km
McCord	Alaska	United States	Village	-	346 km
Port Hobron	Alaska	United States	Village	-	349 km
Morzhovoi	Alaska	United States	Village	-	349 km
Ikatan	Alaska	United States	Village	-	354 km
Savonoski	Alaska	United States	Village	-	367 km
Libbyville	Alaska	United States	Village	-	372 km
Ekuk	Alaska	United States	Village	-	374 km
Port O'Brien	Alaska	United States	Village	-	378 km
Koggiung	Alaska	United States	Village	-	382 km
Tuklung	Alaska	United States	Village	-	382 km
Nakeen	Alaska	United States	Village	-	389 km
Nushagak	Alaska	United States	Village	-	389 km
Kvichak	Alaska	United States	Village	-	394 km
Konakanak	Alaska	United States	Village	-	394 km
Nelsonville	Alaska	United States	Village	-	396 km
Dillingham	Alaska	United States	Village	2500 people	399 km
Wood River	Alaska	United States	Village	-	402 km
Hallersville	Alaska	United States	Village	-	403 km
Port Bailey	Alaska	United States	Village	-	404 km
Ungalikthluk	Alaska	United States	Village	-	408 km
Port Wakefield	Alaska	United States	Village	-	413 km
Afognak	Alaska	United States	Village	-	423 km
Kodiak	Alaska	United States	City	6300 people	424 km
Kulik Lodge	Alaska	United States	Village	-	425 km
Numachuak	Alaska	United States	Village	-	462 km
Kamishak	Alaska	United States	Village	-	463 km
Port William	Alaska	United States	Village	-	466 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	92 km
Chignik Bay	KBW	unknown				0	96 km
Chignik Fisheries	KCG	8				0	97 km
Chignik Lagoon	KCL	15				0	101 km
Chignik Lake		15				0	103 km
Ivanof Bay	KIB	unknown				0	109 km
Johnsons Landing		40				0	160 km
Sand Point	SDP	6	Civ.	Paved	Yes	4000	166 km
Squaw Harbor		unknown				0	170 km
Port Heiden	PTH	29	Civ.	Unpaved	Yes	6200	171 km
Port Moller	PML	unknown				0	176 km
Herendeen Bay		6				0	191 km
Nelson Lagoon	NLG	4				0	212 km
Ugashik Bay	UGB	40				0	230 km
Ugashik/new	UGS	8				0	231 km
Pilot Point	PIP	17				0	236 km
Big Creek	BIC	unknown				0	245 km
Sitkinak	SKJ	unknown				0	264 km
Bear Creek	BCC	unknown				0	270 km
Fort Jensen		73				0	273 km
Alitak	ALZ	unknown				0	277 km
King Cove	KVC	47				0	279 km
Akhiok	AKK	13				0	283 km
Moser Bay	KMY	unknown				0	291 km
Olga Bay	KOY	unknown				0	295 km
Egegik	EGX	26	Civ.	Unpaved	No	3000	304 km
Cold Bay	CDB	30	Civ.	Paved	Yes	10400	306 km
Bartletts		15				0	307 km
Blinn Lake		15				0	308 km
Bartletts Bistol Bay	BSZ	unknown				0	312 km
Karluk	KYK	42				0	316 km
Karluk Lake	KKL	112				0	320 km
Pauloff Harbor	KPH	unknown				0	326 km
Larsen Bay		23				0	334 km
Amook Bay		unknown				0	337 km
Zachar Bay	KZB	unknown				0	346 km
Old Harbor		17				0	347 km
Raspberry Strait	RSP	unknown				0	354 km
False Pass	KFP	6				0	357 km
Brooks Lake	BKF	unknown				0	363 km
Peterson'S Point	PNF	unknown				0	363 km
South Naknek Nr 2	WSN	40				0	364 km
King Salmon	AKN	17	Civ.	Paved	Yes	8500	365 km
Tibbetts		15				0	367 km
Lake Brooks		11				0	367 km
Paf Cannery		18				0	367 km
West Point Village	KWP	unknown				0	371 km
Ekuk	KKU	9				0	374 km
Naknek	NNK	unknown				0	374 km
Kizhuyak	KZH	unknown				0	376 km
Clarks Point	CLP	3				0	377 km
San Juan / Uganik	WSJ	unknown				0	377 km
The Queens		8				0	380 km
Koggiung		9				0	382 km
Portage Creek		42				0	382 km
Uganik	UGI	unknown				0	383 km
Nakeen		15				0	388 km
Pleasant Harbor	PTR	unknown				0	391 km
Kvichak / Diamond J		8				0	393 km
Ans Hospital		30				0	395 km
Manokotak		33				0	397 km
Dillingham	DLG	26	Civ.	Paved	Yes	6400	399 km
Wood River	WOD	unknown				0	401 km
Shannons Pond		24				0	401 km
Port Bailey	KPY	unknown				0	405 km
Nushagak		12				0	408 km
Port Lions	ORI	16				0	410 km
Levelock	KLL	18				0	412 km
Kodiak Municipal	KDK	22	Civ.	Paved	Yes	7500	418 km
Tripod		69				0	424 km
Twin Hills	TWA	25				0	425 km
Kulik Lake	LKK	219				0	426 km
Togiak	TOG	6	Civ.	Unpaved	Yes	4200	426 km
Aleknagik	WKK	2				0	426 km
Kodiak / Lily Lake		40				0	427 km
Danger Bay	DGB	unknown				0	429 km
Ouzinkie		17				0	429 km
Ekwok	KEK	40				0	433 km
Cape Newenham Lrrs	EHM	165	Civ.	Unpaved	No	3900	433 km
Onion Bay	ONN	unknown				0	436 km
New Stuyahok	KNW	99				0	444 km
Igiugig	IGG	26				0	445 km
Platinum Mine		30				0	446 km
Seal Bay	SYB	unknown				0	446 km
Kitoi Bay	KKB	unknown				0	454 km
Cape Sarichef	CSH	89	Civ.	Unpaved	No	3500	458 km
Platinum	PTU	5	Civ.	Unpaved	Yes	3300	459 km
Big Mountain	BMX	202				0	461 km
Goodnews	GNU	5				0	462 km
Blue Fox Bay	BFB	unknown				0	464 km
Pope Vanoy	PVY	unknown				0	464 km
Port Williams	KPR	unknown				0	466 km
Golden Horn	GDH	unknown				0	473 km
Koliganek		82				0	475 km

Ports

Name	LOCODE	Country	Distance
Perryville	USPYX	Wake Island	91 km
Chignik		Wake Island	96 km
Ivanof Bay		Wake Island	104 km
Chirikof Island		Wake Island	154 km
Port Heiden		Wake Island	163 km
Unga		Wake Island	167 km
Sand Point		Wake Island	167 km
Baralof Bay		Wake Island	168 km
Port Moller		Wake Island	176 km
Ugashik		Wake Island	232 km
Pilot Point		Wake Island	235 km
Kanatak		Wake Island	260 km
Belkofski		Wake Island	265 km
Lazy Bay		Wake Island	277 km
King Cove		Wake Island	283 km
Karluk		Wake Island	284 km
Trap Point		Wake Island	289 km
Cold Bay		Wake Island	305 km
Egegik		Wake Island	307 km
Karluk		Wake Island	316 km
Fort Randal		Wake Island	325 km
Three Saints Bay		Wake Island	329 km
Sanak Island		Wake Island	333 km
Larsen Bay		Wake Island	333 km
Cape Constantine		Wake Island	335 km
Uyak		Wake Island	340 km
Port Hobron		Wake Island	349 km
Naknek		Wake Island	365 km
Ekuk		Wake Island	374 km
Port Obrien		Wake Island	377 km
Koggiung		Wake Island	394 km
Kanakanak		Wake Island	395 km
Dillingham		Wake Island	398 km
Dry Spruce Bay		Wake Island	405 km
Port Vita		Wake Island	414 km
Womens Bay		Wake Island	415 km
Kodiak		Wake Island	425 km
Togiak		Wake Island	427 km
Ouzinkie		Wake Island	429 km
Unimak		Wake Island	437 km
Cape Newenham		Wake Island	437 km
Platinum		Wake Island	460 km
Bear Island		Wake Island	460 km
Port William		Wake Island	467 km

Dams

Intensity	Reservoir	Dam Name	River	Year	Distance
		Terror Lake	Terror River	1984	386 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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