M 5.5 in United States on 08 Apr 2021 17:10 UTC

Hazard models

EQ parameters
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: 77.7 Km
Lat/Lon: 63.2075 , -148.5817
Event Date: 08 Apr 2021 17:10 UTC
08 Apr 2021 09:10 Local
Exposed Population: About 1000 people within 100km
Source: ALASKA EC ak0214icukav
Inserted at: 08 Apr 2021 17:51 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)		 GDACS score
ALASKA EC 0 0
ak0214icukav 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
1369187 0 08 Apr 2021 17:10 5.9M, 59.4km N/A 1 thousand (in 100km) 00:06 ALASKA EC
1369188 0 08 Apr 2021 17:10 5.9M, 1km N/A 1 thousand (in 100km) 00:07 ALASKA EC
1369190 0 08 Apr 2021 17:10 5.9M, 73km N/A 1 thousand (in 100km) 00:10 ALASKA EC
1369193 0 08 Apr 2021 17:10 5.7M, 77.7km 4.17 N/A (in MMI>=VII) 00:12 ALASKA EC
1369195 0 08 Apr 2021 17:10 5.5M, 77.7km 3.96 N/A (in MMI>=VII) 00:41 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 (population 380) . 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 1369193 63.184/-148.536 5.9 59.4 5.112 08 Apr 2021 17:20 00:09 (new episode)
2 0 1369193 63.189/-148.548 5.9 73.0412 4.32 08 Apr 2021 17:21 00:11 (upd of #1)
3 0 1369193 63.208/-148.582 5.74 77.6794 4.17 08 Apr 2021 17:29 00:18 (upd of #2)
4 0 1369195 63.208/-148.582 5.5 77.6794 3.96 08 Apr 2021 19:54 02:44 (new episode)

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
Summit Alaska United States Village - 31 km
Broad Pass Alaska United States Village - 35 km
Colorado Alaska United States Village - 43 km

see full list


Critical infrastructure

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

Airports

Intensity Name IATA Code Elevation (m) Usage Runway type IFR Runway Length (ft) Distance
Golden North Airfield 686 0 23 km
Cantwell 668 0 28 km
Summit UMM 734 0 31 km
Igloo 610 0 40 km
Denali 625 0 50 km
Road Commission Nr 1 770 0 54 km

More information

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