M 6.3 in United States from 22 Aug 2018 09:31 UTC to 09:31

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: 6.3M
Depth: 12 Km
Event Date: 22 Aug 2018 09:31 UTC
22 Aug 2018 00:31 Local
Exposed Population: No people within 100km
Source: NTWC     at00pduvsw
Inserted at: 22 Aug 2018 09:37 UTC
INFORM Coping capacity of the alert score:
1.1 (United States)

GDACS Score

For more info on GDACS alert score click here.
  Earthquake Tsunami GDACS score
NTWC     0 0 0
at00pduvsw Scaled population (vector) 0 Max wave alert 0m  
  C1 earthquake 1 Max wave realtime 0m  
  C2 earthquake 0      
  Country Vulnerability 0      
  INFORM_normalised 1      
Maximum expected impact using different data sources.
Click on image to zoom it.

Episode Timeline

IDAlertScoreDateMag, DepthMMI*Population**Tsunami risk***Delay (hh:mm)Source
1225340 0 22 Aug 2018 09:31 6.3M, 12km N/A No people affected (in 100km) 0m (at 00:00) 00:05 NTWC    
1225343 0 22 Aug 2018 09:31 6.2M, 10km 3.57 N/A (in MMI>=VII) 0m (at 00:00) 00:18 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

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

See full locations list (RSS)


Initial conditions

Title: "off the coast of Oregon"

Fault parameters

  • Latitude: 43.623
  • Longitude: -127.982
  • Length: 22 km
  • Width: 6 km
  • Magnitude: 6.3 M

Okada parameters:

  • Slip: .6 m
  • Strike: 359 (geogr angle: north=0, south=180)
  • Dip: 9 degree
  • Rake: 90 degree
  • Depth: 12 km

Calculation parameters

  • Calculation space (lon/lat): -129.482, 42.123, -126.482, 45.123
  • Instead of Step -> use Cell size:.25 minutes

Sea Level

More information

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

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