M 4.7 in United States from 20 Oct 2020 04:07 UTC to 04:07

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: 4.7M
Depth: 1 Km
Lat/Lon: 56.953 , -155.756
Event Date: 20 Oct 2020 04:07 UTC
19 Oct 2020 18:07 Local
Exposed Population: Few people within 100km
Source: ALASKA EC ak020diafj56
Inserted at: 20 Oct 2020 04:18 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
ak020diafj56 Scaled population (vector) 0.69  
  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
1338609 0 20 Oct 2020 04:07 4.7M, 1km N/A Few people (in 100km) 00:10 ALASKA EC
1338610 0 20 Oct 2020 04:07 5.3M, 31.1km N/A No people affected (in 100km) 00:14 ALASKA EC
1338611 0 20 Oct 2020 04:07 5.6M, 13.78km 3.76 N/A (in MMI>=VII) 02:04 NEIC
1338783 0 20 Oct 2020 04:07 5.6M, 6.08km 3.76 N/A (in MMI>=VII) 17:48 NEIC
1339020 0 20 Oct 2020 04:07 5.6M, 9.71km 3.73 N/A (in MMI>=VII) 1d 00:05 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 , State of Alaska (population 572,432) .

Radius Population
100 km <1000 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.

Airports

Name IATA Code Elevation (m) Usage Runway type IFR Runway Length (ft) Distance
Bear Creek BCC unknown 0 74 km
Alitak ALZ unknown 0 92 km
Olga Bay KOY unknown 0 95 km
Akhiok AKK 13 0 96 km
Moser Bay KMY unknown 0 99 km

Ports

Name LOCODE Country Distance
Kanatak Wake Island 70 km
Karluk Wake Island 72 km
Lazy Bay Wake Island 92 km
Trap Point Wake Island 98 km

More information

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