M 5.5 in United States on 29 Jul 2021 06:32 UTC
Shakemap
Tsunami

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: 5.5M
Depth: 10 Km
Lat/Lon: 54.9213 , -156.4119
Event Date: 29 Jul 2021 06:32 UTC
28 Jul 2021 20:32 Local
Exposed Population: No people affected in MMI IV
No people within 100km
Source: ALASKA EC ak0219nemeqt
Inserted at: 29 Jul 2021 08:32 UTC
INFORM Coping capacity of the alert score: 1.1 (United States)

GDACS Score

For more info on GDACS alert score click here.
  Earthquake
(Shakemap)
GDACS score
ALASKA EC 0 0
ak0219nemeqt Scaled population (raster) 0  
  C1 shakemap -0.59  
  C2 shakemap 0.53  
  Country Vulnerability 0  
  INFORM_normalised 1  
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
1387981 0 29 Jul 2021 06:32 5.6M, 5km 3.31 less than 100 (in MMI>=VII) 00:15 ALASKA EC
1388030 0 29 Jul 2021 06:32 5.5M, 10km 3.15 less than 100 (in MMI>=VII) 02:00 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 unknowed a zone. 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 1387981 55.402/-156.903 5.6 15.7 3.455 29 Jul 2021 06:46 00:14 (new episode)
2 0 1387981 55.385/-156.883 5.6 5.0 3.311 29 Jul 2021 06:52 00:20 (upd of #1)
3 0 1388030 54.921/-156.412 5.5 10.0 3.153 29 Jul 2021 08:43 02:11 (new episode)

Affected Provinces



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.