M 6.9 in New Zealand from 21 Jul 2013 05:09 UTC to 05:09

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: 6.9M
Depth: 31 Km
Event Date: 21 Jul 2013 05:09 UTC
21 Jul 2013 17:09 Local
Exposed Population:
300000 people within 100km
Source: NEIC
Inserted at: 21 Jul 2013 07:20 UTC

GDACS Score

For more info on GDACS alert score click here.
  Earthquake Tsunami GDACS score
NEIC 0.8 0 0.8
Scaled population (vector) n.a Max wave scenario 0m  
  C1 earthquake n.a Max wave realtime 0.09m  
  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
1000744 0.8 21 Jul 2013 05:09 6.9M, 31km N/A 310 thousand (in 100km) 0.1m (at 00:25) 02:11 NEIC
1000745 0.8 21 Jul 2013 05:09 6.9M, 10.1km N/A 430 thousand (in 100km) 0.5m (at 01:04) 02:20 NEIC
1000748 0.1 21 Jul 2013 05:09 6.5M, 14km N/A 420 thousand (in 100km) 0.2m (at 01:06) 02:56 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  0.1m in Seatoun, New Zealand. This height is estimated for 21-Jul-2013 06:04:64.

Alert Date (UTC) Name Country Wave height (m)
21-Jul-2013 06:04:64 Seatoun New Zealand  0.1
21-Jul-2013 06:04:64 Brooklyn New Zealand  0.1
21-Jul-2013 06:04:64 Island_Bay New Zealand  0.1
21-Jul-2013 06:04:64 Berhampore New Zealand  0.1
21-Jul-2013 06:04:64 Wellington New Zealand  0.1
21-Jul-2013 06:04:64 Kilbirnie New Zealand  0.1
21-Jul-2013 06:04:64 Hataitai New Zealand  0.1
21-Jul-2013 06:04:64 Miramar New Zealand  0.1
21-Jul-2013 06:46:38 Hapuku New Zealand  0.1
21-Jul-2013 06:28:38 Mirza New Zealand  0.1
21-Jul-2013 05:25:38 Ward New Zealand  0.0

See full locations list (RSS)


Initial conditions

Title: " off the east coast of the South Island of New Zealand"

Fault parameters

  • Latitude: -42.05
  • Longitude: 174.94
  • Length: 44 km
  • Width: 12 km
  • Magnitude: 6.9 M

Okada parameters:

  • Slip: 1.2 m
  • Strike: 260 (geogr angle: north=0, south=180)
  • Dip: 21 degree
  • Rake: 90 degree
  • Depth: 31 km

Calculation parameters

  • Calculation space (lon/lat): 171.94, -45.05, 177.94, -39.05
  • Instead of Step -> use Cell size:.5 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.