M 7.6 in United States on 19 Oct 2020 20:54 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: 7.6M
Depth: 33.25 Km
Event Date: 19 Oct 2020 20:54 UTC
19 Oct 2020 12:54 Local
Exposed Population: Less then 100 people in MMI VII
About 800 people within 100km
Source: NEIC us6000c9hg
Inserted at: 20 Oct 2020 18:00 UTC
INFORM Coping capacity of the alert score:
2.2 (United States)
Maximun Wave Height observed: 0.762 m

GDACS Score

For more info on GDACS alert score click here.
  Earthquake
(Shakemap)		 Tsunami GDACS score
NEIC 0.3 0.2 0.3
us6000c9hg Scaled population (raster) 2.11 Max wave alert 0.25m  
  C1 shakemap -0.59 Max wave realtime 0.25m  
  C2 shakemap 0.53      
  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.

Estimated Tsunami affected locations

The maximum observed wave height is 0.762m in Chignik Bay (Alaska);
The maximum Wave height is  0.3m in Unga, United States. This height is estimated for 19-Oct-2020 21:37:62.

Alert Date (UTC) Name Country Wave height (m)
19-Oct-2020 21:37:62 Unga United States  0.3
20-Oct-2020 00:35:58 King Cove United States  0.2
19-Oct-2020 21:52:73 Village United States  0.2
19-Oct-2020 23:33:15 Mitrofania United States  0.2
19-Oct-2020 23:16:25 Perryville United States  0.2
20-Oct-2020 00:19:96 Belkofski United States  0.2
20-Oct-2020 00:19:26 Ikatan United States  0.2
20-Oct-2020 00:28:88 Umnak United States  0.1
20-Oct-2020 00:22:07 Dutch Harbor United States  0.1
20-Oct-2020 00:22:07 Unalaska United States  0.1
20-Oct-2020 00:22:07 Unalaska USA  0.1
19-Oct-2020 23:27:64 Biorka United States  0.1
19-Oct-2020 22:51:64 Old Harbor United States  0.1
20-Oct-2020 00:58:25 Ayakulik United States  0.1

See full locations list (RSS)


Initial conditions

Title: ""97 km SSE of Sand Point""

Fault parameters

  • Latitude: 54.608
  • Longitude: -159.655
  • Length: 100 km
  • Width: 28 km
  • Magnitude: 7.6 M

Okada parameters:

  • Slip: 2.5 m
  • Strike: 253 (geogr angle: north=0, south=180)
  • Dip: 15 degree
  • Rake: 90 degree
  • Depth: 33 km

Calculation parameters

  • Calculation space (lon/lat): -168.655, 45.608, -150.655, 63.608
  • Instead of Step -> use Cell size:1.5 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.