M 7.3 in New Zealand on 04 Mar 2021 13:27 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: 7.3M
Depth: 20.78 Km
Event Date: 04 Mar 2021 13:27 UTC
05 Mar 2021 01:27 Local
Exposed Population: Less then 100 people in MMI VI
About 700 people within 100km
Source: NEIC us7000dffl
Inserted at: 04 Mar 2021 15:16 UTC
INFORM Coping capacity of the alert score:
2 (New Zealand)
Maximun Wave Height observed: 0.28 m

GDACS Score

For more info on GDACS alert score click here.
  Earthquake
(Shakemap)		 Tsunami GDACS score
NEIC 0 0.5 0.5
us7000dffl Scaled population (raster) 0 Max wave alert 0.58m  
  C1 shakemap -0.59 Max wave realtime 0.58m  
  C2 shakemap 0.53      
  Country Vulnerability 0      
  INFORM_normalised 0.63      
Maximum expected impact using different data sources.
Click on image to zoom it.

Episode Timeline

IDAlertScoreDateMag, DepthMMI*Population**Tsunami risk***Delay (hh:mm)Source
1361964 0.3 04 Mar 2021 13:27 6.9M, 10km 6.14 N/A (in MMI>=VII) 0.3m (at 00:54) 00:25 NEIC
1362005 0.5 04 Mar 2021 13:27 7.3M, 20.78km 6.44 N/A (in MMI>=VII) 0.6m (at 00:50) 01:48 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 0.28m in East Cape Nz;
The maximum Wave height is  0.6m in Port Awanui, New Zealand. This height is estimated for 4-Mar-2021 14:17:64.

Alert Date (UTC) Name Country Wave height (m)
4-Mar-2021 14:17:64 Port Awanui New Zealand  0.6
4-Mar-2021 13:53:35 East Cape New Zealand  0.4
4-Mar-2021 13:53:35 Horoera New Zealand  0.4
4-Mar-2021 14:57:68 Tokomaru Bay New Zealand  0.3
4-Mar-2021 14:25:06 Whareponga New Zealand  0.3
4-Mar-2021 14:21:13 Waihau Bay New Zealand  0.2
4-Mar-2021 14:47:12 Waipiro Bay New Zealand  0.2
4-Mar-2021 13:59:75 Cape Runaway New Zealand  0.2
4-Mar-2021 14:01:26 Raukokore New Zealand  0.1
4-Mar-2021 14:17:64 Houpoto New Zealand  0.1
4-Mar-2021 14:05:75 Te Kaha New Zealand  0.1
4-Mar-2021 14:35:84 Torere New Zealand  0.1
4-Mar-2021 14:29:88 Opotiki New Zealand  0.1
4-Mar-2021 15:33:17 Whangara New Zealand  0.1
4-Mar-2021 16:09:33 Mahia New Zealand  0.1
4-Mar-2021 14:57:68 Whangamumu New Zealand  0.1
4-Mar-2021 14:13:82 Omaio New Zealand  0.1
4-Mar-2021 14:11:06 Mahanga New Zealand  0.1
4-Mar-2021 15:35:05 Ohope Beach New Zealand  0.1
4-Mar-2021 14:33:92 Mount Maunganui New Zealand  0.1
4-Mar-2021 14:33:92 Port of Tauranga New Zealand  0.1
4-Mar-2021 14:57:68 Whangapoua New Zealand  0.1
4-Mar-2021 15:21:24 Gisborne New Zealand  0.1
4-Mar-2021 15:21:24 Gisborne New Zealand  0.1
4-Mar-2021 14:53:19 Port Fitzroy New Zealand  0.1
4-Mar-2021 15:11:35 Makaraka New Zealand  0.1
4-Mar-2021 14:29:88 Otamarakau New Zealand  0.1
4-Mar-2021 14:21:13 Waimarama New Zealand  0.1
4-Mar-2021 16:13:74 Tryphena New Zealand  0.1
4-Mar-2021 16:07:21 Matapouri New Zealand  0.1
4-Mar-2021 15:31:78 Tawharanui New Zealand  0.1
4-Mar-2021 14:35:84 Waihi Beach New Zealand  0.1
4-Mar-2021 14:47:12 Whakaki New Zealand  0.1
4-Mar-2021 16:11:86 Napier New Zealand  0.1

See full locations list (RSS)


Initial conditions

Title: ""M 7.3, 174 km NE of Gisborne, New Zealand""

Fault parameters

  • Latitude: -37.563
  • Longitude: 179.444
  • Length: 70 km
  • Width: 19 km
  • Magnitude: 7.3 M

Okada parameters:

  • Slip: 1.9 m
  • Strike: 202 (geogr angle: north=0, south=180)
  • Dip: 17 degree
  • Rake: 90 degree
  • Depth: 21 km

Calculation parameters

  • Calculation space (lon/lat): 173.444, -43.563, 185.444, -31.563
  • Instead of Step -> use Cell size:1 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.