M 4.9 in Samoa on 31 Oct 2017 21:10 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: 4.9M
Depth: 10 Km
Lat/Lon: -15.6996 , -173.3072
Event Date: 31 Oct 2017 21:10 UTC
31 Oct 2017 09:10 Local
Exposed Population:
About 1000 people within 100km
Source: NEIC us1000azcz
Inserted at: 31 Oct 2017 21:36 UTC
INFORM Coping capacity of the alert score
1.1 (Samoa)

GDACS Score

For more info on GDACS alert score click here.
  Earthquake GDACS score
NEIC 0 0
us1000azcz Scaled population (vector) 2.72  
  C1 earthquake 1  
  C2 earthquake 0  
  Country Vulnerability 0  
  INFORM_normalised 1  
Maximum expected impact using different data sources.

Episode Timeline

IDAlertScoreDateMag, DepthMMI*Population**Tsunami risk***Delay (hh:mm)Source
1185823 0 31 Oct 2017 21:10 4.9M, 10km N/A 1 thousand (in 100km) 00:25 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 nearest places are Falehau, and Hihifo.

Radius Population
100 km 1100 people
75 km 1100 people
50 km no people
20 km no people
10 km no people
5 km no people
2 km no people

Affected Provinces

Region Province Country Population
Samoa Samoa 160000 people
American Samoa American Samoa 53000 people
Tonga Tonga 98000 people
Wallis & Futuna Wallis and Futuna 14000 people

Affected populated places

Name Region Province Country City class Population Distance
Falehau Tonga Village - 53 km
Hihifo Tonga Village <1000 people 56 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.