M 8.1 Earthquake and Tsunami (2.2 m) in Kermadec Islands, New Zealand on 04 Mar 2021 19:28 UTC

Hazard models

EQ parameters
Shakemap
Tsunami

Event summary

This earthquake is expected to have a medium humanitarian impact based on the magnitude and the affected population and their vulnerability.

Earthquake Magnitude: 8.1M
Depth: 26.45 Km
Lat/Lon: -29.7347 , -177.2817
Event Date: 04 Mar 2021 19:28 UTC
04 Mar 2021 07:28 Local
Exposed Population: No people within 100km
Source: NEIC us7000dflf
Inserted at: 05 Mar 2021 18:12 UTC
INFORM Coping capacity of the alert score: 1.1 ()

GDACS Score

For more info on GDACS alert score click here.
  Earthquake
(Shakemap)		 Tsunami GDACS score
NEIC 0 1.5 1.5
us7000dflf Scaled population (vector) 0 Max wave alert 2.16m  
  C1 shakemap -0.59 Max wave realtime 2.16m  
  C2 shakemap 0.53      
  Country Vulnerability 0      
  INFORM_normalised 1      
Maximum expected impact using different data sources.

ShakeMap is a product of the USGS Earthquake Hazards Program in conjunction with the regional seismic networks. ShakeMaps provide near-real-time maps of ground motion and shaking intensity following significant earthquakes.


Episode Timeline

IDAlertScoreDateMag, DepthMMI*Population**Tsunami risk***Delay (hh:mm)Source
1362118 1.1 04 Mar 2021 19:28 8M, 10km N/A No people affected (in 100km) 1.3m (at 00:18) 00:14 PTWC
1362120 1.5 04 Mar 2021 19:28 8M, 10km N/A No people affected (in 100km) 2.1m (at 00:18) 00:19 NTWC
1362129 1.5 04 Mar 2021 19:28 7.8M, 10km N/A No people affected (in 100km) 2m (at 00:10) 01:42 NEIC
1362131 1.5 04 Mar 2021 19:28 8M, 10km N/A No people affected (in 100km) 2.1m (at 00:18) 01:30 NTWC
1362132 1.5 04 Mar 2021 19:28 7.8M, 10km N/A No people affected (in 100km) 2m (at 00:10) 00:43 NEIC
1362133 1.5 04 Mar 2021 19:28 8M, 10km N/A No people affected (in 100km) 2.1m (at 00:18) 00:38 NTWC
1362136 1.5 04 Mar 2021 19:28 7.8M, 10km N/A No people affected (in 100km) 2m (at 00:10) 00:30 NEIC
1362139 1.1 04 Mar 2021 19:28 8M, 10km N/A No people affected (in 100km) 1.3m (at 00:18) 00:56 PTWC
1362140 1.5 04 Mar 2021 19:28 7.8M, 10km 7.21 No people affected (in 100km) 2m (at 00:10) 00:51 NEIC
1362143 1.3 04 Mar 2021 19:28 8.1M, 10km 7.21 No people affected (in 100km) 1.7m (at 00:14) 00:46 NEIC
1362145 1.7 04 Mar 2021 19:28 8.1M, 19.4km 8.7 No people affected (in 100km) 2.4m (at 00:10) 01:01 NEIC
1362590 1.5 04 Mar 2021 19:28 8.1M, 26.45km 8.69 N/A (in MMI>=VII) 2.2m (at 00:10) 22:43 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.

Exposed population

The earthquake happened in unknowed a zone. The alertlevel for this event is GREEN

Intensity Population


Shakemaps Timeline

AlertShake id #ScoreepisodeidLat/LonMagnitudeDepthMax MMIDate shake (UTC)Delay (hh:mm) 
1 0 1362140 -29.747/-177.224 7.8 10.0 7.214 04 Mar 2021 19:53 00:24 (new episode)
2 0 1362145 -29.74/-177.267 8.1 19.4 8.361 04 Mar 2021 20:32 01:04 (new episode)
3 0 1362145 -29.74/-177.267 8.1 19.4 8.361 04 Mar 2021 21:34 02:05 (upd of #2)
4 0 1362145 -29.74/-177.267 8.1 19.4 8.703 05 Mar 2021 17:13 21:45 (upd of #3)
5 0 1362590 -29.735/-177.282 8.1 26.4 8.69 05 Mar 2021 18:13 22:45 (new episode)
6 0 1362590 -29.735/-177.282 8.1 26.4 8.69 05 Mar 2021 19:33 1d 00:04 (upd of #5)

Affected Provinces



Critical infrastructure

Airports, ports, nuclear plants and hydrodams at risk, if affected, are listed below.

More information

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