M 6.7 in Samoa Islands Region on 04 Dec 2022 19:24 UTC

Hazard models

Rapid Impact
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: 6.7M
Depth: 35.999 Km
Lat/Lon: -15.3983 , -172.968
Event Date: 04 Dec 2022 19:24 UTC
04 Dec 2022 07:24 Local
Exposed Population: 1 thousand in MMI&>=IV
Source: NEIC us6000j6w8
Inserted at: 04 Dec 2022 19:43 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 0 0
us6000j6w8 Scaled population (vector) 0 Max wave alert 0m  
  C1 shakemap -0.59 Max wave realtime 0m  
  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
1476910 0.1 04 Dec 2022 19:24 6.9M, 33km N/A 1 thousand (in 100km) 0.2m (at 00:17) 00:08 PTWC
1476912 0 04 Dec 2022 19:24 6.9M, 148km N/A 1 thousand (in 100km) 0m (at 00:00) 00:13 NTWC
1476914 0 04 Dec 2022 19:24 6.7M, 35.999km 4.83 N/A (in MMI>=VII) 0m (at 00:00) 00:19 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.

Exposed population

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

Intensity Population
no people


Shakemaps Timeline

AlertShake id #ScoreepisodeidLat/LonMagnitudeDepthMax MMIDate shake (UTC)Delay (hh:mm) 
1 0 1476914 -172.968/-15.398 6.7 36 4.872 04 Dec 2022 19:46 00:22 (new episode)
2 0 1476914 -172.968/-15.398 6.7 36 4.834 04 Dec 2022 20:04 00:40 (upd of #1)
3 0 1476914 -172.968/-15.398 6.7 36 4.834 04 Dec 2022 21:28 02:04 (upd of #2)
4 0 1476914 -172.968/-15.398 6.7 36 4.834 05 Dec 2022 19:40 1d 00:16 (upd of #3)

Affected Provinces


Affected populated places. Areas of interest

Intensity Name Region Province Country City class Population Distance
Falehau Tonga Village - 102 km
Hihifo Tonga Village <1000 people 106 km
Falehau Tonga Village - 102 km
Hihifo Tonga Village <1000 people 106 km

see full list


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.