M 7.4 in United States from 19 Oct 2020 20:54 UTC to 20:54

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: 7.4M
Depth: 41 Km
Event Date: 19 Oct 2020 20:54 UTC
19 Oct 2020 12:54 Local
Exposed Population: About 800 people within 100km
Source: NTWC at00qigvf4
Inserted at: 19 Oct 2020 21:01 UTC
INFORM Coping capacity of the alert score:
2.2 (United States)

GDACS Score

For more info on GDACS alert score click here.
  Earthquake Tsunami GDACS score
NTWC 0 0.2 0.2
at00qigvf4 Scaled population (vector) 1.91 Max wave alert 0.26m  
  C1 earthquake 1 Max wave realtime 0.26m  
  C2 earthquake 0      
  Country Vulnerability 0      
  INFORM_normalised 0.65      
Maximum expected impact using different data sources.
Click on image to zoom it.

Episode Timeline

IDAlertScoreDateMag, DepthMMI*Population**Tsunami risk***Delay (hh:mm)Source
1338485 0.2 19 Oct 2020 20:54 7.4M, 41km N/A Few people (in 100km) 0.3m (at 02:16) 00:06 NTWC
1338489 0.2 19 Oct 2020 20:54 7.4M, 41km N/A Few people (in 100km) 0.3m (at 02:16) 00:10 PTWC
1338491 0.3 19 Oct 2020 20:54 7.5M, 40.12km 8.16 less than 100 (in MMI>=VII) 0.4m (at 00:54) 02:07 NEIC
1338751 0.3 19 Oct 2020 20:54 7.6M, 33.25km 7.19 879 (in MMI>=VII) 0.3m (at 00:43) 21:06 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

The maximum Wave height is  0.3m in Sand Point, United States. This height is estimated for 19-Oct-2020 23:10:95.

Alert Date (UTC) Name Country Wave height (m)
19-Oct-2020 23:10:95 Sand Point United States  0.3
19-Oct-2020 23:10:95 Sand_Point_AK USA  0.3
19-Oct-2020 21:44:64 Squaw Harbor United States  0.2
19-Oct-2020 22:18:56 Unga United States  0.1
19-Oct-2020 23:14:95 Perryville United States  0.1
20-Oct-2020 00:22:04 Belkofski United States  0.1
19-Oct-2020 22:46:91 Village United States  0.1
19-Oct-2020 23:26:49 Mitrofania United States  0.1
19-Oct-2020 23:28:34 King Cove United States  0.1
20-Oct-2020 00:20:18 Ikatan United States  0.1
19-Oct-2020 23:56:65 Chignik United States  0.1

See full locations list (RSS)


Initial conditions

Title: ""94 km SE of Sand Point""

Fault parameters

  • Latitude: 54.665
  • Longitude: -159.608
  • Length: 79 km
  • Width: 22 km
  • Magnitude: 7.4 M

Okada parameters:

  • Slip: 2 m
  • Strike: 253 (geogr angle: north=0, south=180)
  • Dip: 15 degree
  • Rake: 90 degree
  • Depth: 41 km

Calculation parameters

  • Calculation space (lon/lat): -167.108, 47.165, -152.108, 62.165
  • Instead of Step -> use Cell size:1.25 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.