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
Glide number:	EQ-2021-000099-USA
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.

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 , State of Alaska (population 572,432) .

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

Affected Provinces

Region Province	Country	Population
Alaska	United States	570000 people

Critical infrastructure

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

Airports

Name	IATA Code	Elevation (m)	Distance
Perryville		7	92 km
Chignik Bay	KBW	unknown	96 km
Chignik Fisheries	KCG	8	97 km

Ports

Name	LOCODE	Country	Distance
Perryville	USPYX	Wake Island	91 km
Chignik		Wake Island	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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