M 4.5 in United States on 21 Oct 2021 18:44 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: 4.5M
Depth: 62.8 Km
Lat/Lon: 62.955 , -148.3439
Event Date: 21 Oct 2021 18:44 UTC
21 Oct 2021 10:44 Local
Exposed Population:
Few people affected in 100km
Source: ALASKA EC ak021diizca9
Inserted at: 21 Oct 2021 18:49 UTC
INFORM Coping capacity of the alert score
2.2 (United States)

GDACS Score

For more info on GDACS alert score click here.
  Earthquake GDACS score
ALASKA EC 0 0
ak021diizca9 Scaled population (vector) 2.35  
  C1 earthquake 1  
  C2 earthquake 0  
  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
1403721 0 21 Oct 2021 18:44 4.5M, 62.8km N/A Few people (in 100km) 00:04 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) . The nearest places are Denali, Broad Pass, Cantwell, Summit, Colorado, and Chulitna.

Radius Population
100 km <1000 people
75 km <1000 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

Affected populated places

Name Region Province Country City class Population Distance
Denali Alaska United States Village - 51 km
Broad Pass Alaska United States Village - 57 km
Cantwell Alaska United States Village <1000 people 58 km
Summit Alaska United States Village - 58 km
Colorado Alaska United States Village - 59 km
Chulitna Alaska United States Village - 63 km

see full list

Critical infrastructure

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

Airports

Name IATA Code Elevation (m) Usage Runway type IFR Runway Length (ft) Distance
Road Commission Nr 1 770 0 45 km
Golden North Airfield 686 0 53 km
Cantwell 668 0 58 km
Summit UMM 734 0 58 km
Igloo 610 0 58 km
Clearwater 884 0 60 km
Denali 625 0 80 km
Era Denali MCL 482 Civ. Unpaved No 3000 91 km

More information

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