M 6.6 in Vanuatu on 20 Oct 2012 23:00 UTC

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: 35.4 Km
Event Date: 20 Oct 2012 23:00 UTC
21 Oct 2012 10:00 Local
Exposed Population:
About 2499 people within 100km
Source: NEIC usb000d9v1
Inserted at: 20 Oct 2012 23:20 UTC


For more info on GDACS alert score click here.
  Earthquake Tsunami GDACS score
NEIC 0 1 0.5
usb000d9v1 Scaled population (vector) n.a Max wave scenario 0m  
  C1 earthquake n.a Max wave realtime 0m  
  C2 earthquake n.a      
  Country Vulnerability n.a      
  INFORM_normalised n.a      
Maximum expected impact using different data sources.
Click on image to zoom it.

Episode Timeline

IDAlertScoreDateMag, DepthMMI*Population**Tsunami risk***Delay (hh:mm)Source
120338 0.5 20 Oct 2012 23:00 6.6M, 35.4km N/A 2 thousand (in 100km) 0m (at 00:00) 00:19 NEIC
120339 0 20 Oct 2012 23:00 6.2M, 35.6km N/A 3 thousand (in 100km) 01:06 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

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

See full locations list (RSS)

Initial conditions

Title: "eqid"

Fault parameters

  • Latitude: -13.572
  • Longitude: 166.594
  • Length: 31 km
  • Width: 8 km
  • Magnitude: 6.6 M

Okada parameters:

  • Slip: .9 m
  • Strike: 342 (geogr angle: north=0, south=180)
  • Dip: 28 degree
  • Rake: 90 degree
  • Depth: 35 km

Calculation parameters

  • Calculation space (lon/lat): 165.094, -15.072, 168.094, -12.072
  • 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.