M 4.3 in United States on 23 Nov 2020 22:19 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: 4.3M
Depth: 24.4 Km
Lat/Lon: 56.7351 , -135.9307
Event Date: 23 Nov 2020 22:19 UTC
23 Nov 2020 13:19 Local
Exposed Population: About 8000 people within 100km
Source: ALASKA EC ak020f2thkhg
Inserted at: 23 Nov 2020 22:35 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
ak020f2thkhg 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
1344637 0 23 Nov 2020 22:19 4.5M, 1.1km 2.53 N/A (in MMI>=VII) 00:13 ALASKA EC
1344638 0 23 Nov 2020 22:19 4.3M, 24.4km 3.46 N/A (in MMI>=VII) 00:15 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 1344637 56.546/-136.028 4.46 0.0121 2.53 23 Nov 2020 22:32 00:13 (new episode)
2 0 1344638 56.735/-135.931 4.27 24.4193 3.46 23 Nov 2020 22:36 00:17 (new episode)
3 0 1344638 56.735/-135.931 4.27 24.4193 3.46 23 Nov 2020 22:40 00:21 (upd of #2)

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.