M 4.9 in Tonga on 16 Feb 2017 19:53 UTC

Hazard models

EQ parameters
Shakemap
Tsunami

Event summary

This is a preliminary assessment. The final GDACS Alert Level has been/will be published using more detailed information.

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: 94.97 Km
Lat/Lon: -16.3014 , -174.1206
Event Date: 16 Feb 2017 19:53 UTC
16 Feb 2017 07:53 Local
Exposed Population:
About 1000 people within 100km
Source: NEIC us20008kb6
Inserted at: 17 Feb 2017 00:30 UTC
INFORM Coping capacity of the alert score
1.1 (Tonga)

GDACS Score

For more info on GDACS alert score click here.
  Earthquake GDACS score
NEIC n.a n.a
us20008kb6 Scaled population (vector) 0  
  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
1157707 n.a 16 Feb 2017 19:53 4.9M, 94.97km N/A 1 thousand (in 100km) 04:36 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 Tonga , of Tonga (population 98,000) . The nearest places are Hihifo, and Falehau.

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
Tonga Tonga 98000 people
Samoa Samoa 160000 people
Wallis & Futuna Wallis and Futuna 14000 people
American Samoa American Samoa 53000 people

Affected populated places

Name Region Province Country City class Population Distance
Hihifo Tonga Village <1000 people 53 km
Falehau Tonga Village - 57 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.