M 5.5 in Samoa on 24 Jan 2019 00:52 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: 5.5M
Depth: 10 Km
Lat/Lon: -15.1354 , -173.4036
Event Date: 24 Jan 2019 00:52 UTC
23 Jan 2019 12:52 Local
Exposed Population: About 500 people within 100km
Source: NEIC us2000j82f
Inserted at: 24 Jan 2019 01:15 UTC
INFORM Coping capacity of the alert score: 1.1 (Samoa)


For more info on GDACS alert score click here.
GDACS score
NEIC 0 0
us2000j82f Scaled population (vector) 0  
  C1 shakemap -0.59  
  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
1245988 0 24 Jan 2019 00:52 5.5M, 10km 3.56 Few people 00:22 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 Samoa ,of Samoa (population 159,000) . The alertlevel for this event is GREEN

Intensity Population
no people
9600 people

Shakemaps Timeline

AlertShake id #ScoreepisodeidLat/LonMagnitudeDepthMax MMIDate shake (UTC)Delay (hh:mm) 
1 0 1245988 -15.135/-173.404 5.5 10 3.56 24 Jan 2019 01:15 00:22 (new episode)
2 0 1245988 -15.135/-173.404 5.5 10 3.56 24 Jan 2019 02:58 02:06 (upd of #1)

Affected Provinces

Intensity Region Province Country Population
Samoa Samoa 20000 people

Affected populated places. Areas of interest

Intensity Name Region Province Country City class Population Distance
Falehau Tonga Village5 - 97 km
Hihifo Tonga Village5 <1000 people 100 km
Salailua Samoa Village5 <1000 people 181 km
Falelima Samoa Village5 <1000 people 187 km
Gautavai Samoa Village5 <1000 people 187 km
Falealupo Samoa Village5 <1000 people 193 km
Satupaitea Samoa Village5 - 194 km
Samatau Samoa Village5 <1000 people 202 km

see full list

Critical infrastructure

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


Intensity Name IATA Code Elevation (m) Usage Runway type IFR Runway Length (ft)
Maota MXS unknown 0

More information

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