M 6.6 in North Of Ascension Island on 18 Aug 2017 02:59 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: 6.6M
Depth: 10 Km
Event Date: 18 Aug 2017 02:59 UTC
18 Aug 2017 01:59 Local
Exposed Population: No people within 100km
Source: NEIC us2000a98r
Inserted at: 18 Aug 2017 04:19 UTC
INFORM Coping capacity of the alert score:
1.1 ()

GDACS Score

For more info on GDACS alert score click here.
  Earthquake Tsunami GDACS score
NEIC 0 0 1
us2000a98r Scaled population (vector) 0 Max wave scenario 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
1177771 1 18 Aug 2017 02:59 6.7M, 19.2km N/A No people affected (in 100km) 0m (at 00:00) 00:15 PTWC
1177772 1 18 Aug 2017 02:59 6.7M, 19km N/A No people affected (in 100km) 0m (at 00:00) 00:17 NTWC    
1177776 1 18 Aug 2017 02:59 6.8M, 10km N/A N/A (in MMI>=VII) 0m (at 00:00) 00:20 NEIC
1177787 1 18 Aug 2017 02:59 6.6M, 10km N/A N/A (in MMI>=VII) 0m (at 00:00) 01:19 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: "North of Ascension Island"

Fault parameters

  • Latitude: -1.085
  • Longitude: -13.631
  • Length: 31 km
  • Width: 8 km
  • Magnitude: 6.6 M

Okada parameters:

  • Slip: .9 m
  • Strike: 101 (geogr angle: north=0, south=180)
  • Dip: 45 degree
  • Rake: 90 degree
  • Depth: 10 km

Calculation parameters

  • Calculation space (lon/lat): -15.131, -2.585, -12.131, .416
  • 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.