M 6.1 in United States on 21 Dec 2023 14:55 UTC

Hazard models

Rapid Impact
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: 6.1M
Depth: 30.1 Km
Lat/Lon: 51.3266 , -175.3556
Event Date: 21 Dec 2023 14:55 UTC
21 Dec 2023 02:55 Local
Exposed Population: Few people affected in MMI -
Source: NEIC usd0010b4f
Inserted at: 21 Dec 2023 15:51 UTC
INFORM Coping capacity of the alert score: 1.1 (United States)

GDACS Score

For more info on GDACS alert score click here.
  Earthquake
(Rapid Impact)		 GDACS score
NEIC 0 0
usd0010b4f Scaled population (raster) 0  
  C1 rapid impact 0  
  C2 rapid impact 0  
  Country Vulnerability 0  
  INFORM_normalised 0  
Maximum expected impact using different data sources.

The green area correspond to areas affected by strong shaking (MMI VI or higher) according to the simulation.


Episode Timeline

IDAlertScoreDateMag, DepthMMI*Population**Tsunami risk***Delay (hh:mm)Source
1543527 0 21 Dec 2023 14:55 6M, 1km 3.55 N/A (in MMI>=VII) N/A 00:07 NTWC
1543529 0 21 Dec 2023 14:55 5.9M, 19.7km 3.63 N/A (in MMI>=VII) N/A 00:14 ALASKA EC
1543530 0 21 Dec 2023 14:55 6.3M, 33.2km 4.02 N/A (in MMI>=VII) 0m (at 00:00) 00:16 NEIC
1543535 0 21 Dec 2023 14:55 6.1M, 30.1km 3.89 N/A (in MMI>=VII) N/A 00:55 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.

Rapid Impact

The results presented below are calculated with the ShakeMap open source software (USGS) using only earthquake hypocenter information to provide a rapid estimation of the ground motion and shaking intensity without taking into account any instrumental observations or earthquake source scaling laws.

Exposed population

The earthquake happened in United States ,of Alaska. The alertlevel for this event is GREEN

Intensity Population
no people

Affected Provinces

Intensity Region Province Country Population
Alaska United States no people

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.