M 6.1 in United States on 29 Jul 2021 06:19 UTC

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: 6.1M
Depth: 27.14 Km
Lat/Lon: 55.0619 , -158.134
Event Date: 29 Jul 2021 06:19 UTC
28 Jul 2021 19:19 Local
Exposed Population: Less then 100 people in MMI V
No people within 100km
Source: NEIC us6000f03k
Inserted at: 29 Jul 2021 07:17 UTC
INFORM Coping capacity of the alert score: 2.2 (United States)


For more info on GDACS alert score click here.
GDACS score
NEIC 0 0
us6000f03k Scaled population (raster) 0  
  C1 shakemap -0.59  
  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

IDAlertScoreDateMag, DepthMMI*Population**Tsunami risk***Delay (hh:mm)Source
1387995 0 29 Jul 2021 06:19 6.1M, 27.14km 3.94 less than 100 (in MMI>=VII) 00:57 NEIC
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

AlertShake id #ScoreepisodeidLat/LonMagnitudeDepthMax MMIDate shake (UTC)Delay (hh:mm) 
1 0 1387995 55.062/-158.134 6.1 27.1 3.943 29 Jul 2021 07:20 01:00 (new episode)
2 0 1387995 55.062/-158.134 6.1 27.1 3.943 29 Jul 2021 08:24 02:04 (upd of #1)
3 0 1387995 55.062/-158.134 6.1 27.1 3.943 30 Jul 2021 06:26 1d 00:06 (upd of #2)

Affected Provinces

Intensity Region Province Country Population
Alaska United States <1000 people

Affected populated places. Areas of interest

Intensity Name Region Province Country City class Population Distance

see full list

Critical infrastructure

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


Intensity Name IATA Code Elevation (m) Usage Runway type IFR Runway Length (ft)
Perryville 7 0


Intensity Name LOCODE Country
Perryville USPYX Wake Island

More information

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