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
Glide number: EQ-2021-000099-USA
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) 1.91 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.

Episode Timeline

IDAlertScoreDateMag, DepthMMI*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 no 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.

More information

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