M 6.2 in United States on 21 Mar 2025 14:53 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: 6.2M
Depth: 17 Km
Event Date: 21 Mar 2025 14:53 UTC
21 Mar 2025 02:53 Local
Exposed Population: Few people affected in MMI -
Source: NEIC us7000pllu
Inserted at: 21 Mar 2025 16:54 UTC
INFORM Coping capacity of the alert score:
1.1 (United States)

GDACS Score

For more info on GDACS score click here.
  Earthquake
(Shakemap)		 Tsunami GDACS score
NEIC 0 0 0
us7000pllu Scaled population (raster) 0 Max wave alert 0m  
  C1 shakemap 0 Max wave realtime 0m  
  C2 shakemap 0      
  Country Vulnerability 0      
  INFORM_normalised 0      
Maximum expected impact using different data sources.
Click on images to zoom it.

Episode Timeline

IDLevelScoreDateMag, DepthMMI*Population**Tsunami risk***Delay (hh:mm)Source
1629176 0 21 Mar 2025 14:53 6.1M, 74km 4.29 N/A (in MMI>=VII) 00:09 NTWC
1629178 0 21 Mar 2025 14:53 5.6M, 28.7km 3.65 Few people (in 100km) 00:11 ALASKA EC
1629180 0 21 Mar 2025 14:53 6.2M, 26km 4.2 N/A (in MMI>=VII) 0m (at 00:00) 00:12 NEIC
1629211 0 21 Mar 2025 14:53 6.2M, 17km 4.19 N/A (in MMI>=VII) 0m (at 00:00) 02:01 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.

Tsunami affected locations

Level Date (UTC) Name Country Wave height (m)

See full locations list (RSS)


Initial conditions

Title: ""M 6.2, 85 km SSE of Adak, Alaska""

Fault parameters

  • Latitude: 51.17
  • Longitude: -176.142
  • Length: 19 km
  • Width: 5 km
  • Magnitude: 6.2 M

Okada parameters:

  • Slip: .6 m
  • Strike: 264 (geogr angle: north=0, south=180)
  • Dip: 15 degree
  • Rake: 90 degree
  • Depth: 17 km

Calculation parameters

  • Calculation space (lon/lat): -177.642, 49.67, -174.642, 52.67
  • Instead of Step -> use Cell size:.25 minutes

Sea Level

More information

  • Timeline:
    Tsunami calculations performed to this case, click here

  • Montecarlo:
    Tsunami Montecarlo simulation performed to this case, click here

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