M 5.5 in Tonga on 06 Nov 2018 16:11 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: 5.5M
Depth: 10 Km
Lat/Lon: -22.1823 , -174.4488
Event Date: 06 Nov 2018 16:11 UTC
06 Nov 2018 04:11 Local
Exposed Population: About 100 people within 100km
Source: NEIC us2000i7iz
Inserted at: 06 Nov 2018 16:43 UTC
INFORM Coping capacity of the alert score: 1.1 (Tonga)

GDACS Score

For more info on GDACS alert score click here.
  Earthquake
(Shakemap)		 GDACS score
NEIC 0 0
us2000i7iz 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
1235614 0 06 Nov 2018 16:11 5.8M, 10km 3.44 N/A (in MMI>=VII) 00:25 NEIC
1235629 0 06 Nov 2018 16:11 5.5M, 10km 3.3 N/A (in MMI>=VII) 00:32 NEIC
1235640 0 06 Nov 2018 16:11 5.6M, 10km 3.25 N/A (in MMI>=VII) 01:24 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 10,790) . The alertlevel for this event is GREEN

Intensity Population
no people
5600 people


Shakemaps Timeline

AlertShake id #ScoreepisodeidLat/LonMagnitudeDepthMax MMIDate shake (UTC)Delay (hh:mm) 
1 0 1235614 -22.174/-174.458 5.8 10 3.44 06 Nov 2018 16:38 00:26 (new episode)
2 0 1235629 -22.174/-174.458 5.8 10 3.44 06 Nov 2018 16:43 00:32 (new episode)
3 0 1235629 -22.182/-174.449 5.5 10 3.3 06 Nov 2018 16:45 00:33 (upd of #2)
4 0 1235640 -22.182/-174.449 5.5 10 3.3 06 Nov 2018 17:36 01:25 (new episode)
5 0 1235640 -22.18/-174.494 5.6 10 3.54 06 Nov 2018 17:45 01:33 (upd of #4)
6 0 1235640 -22.18/-174.494 5.6 10 3.54 06 Nov 2018 18:13 02:02 (upd of #5)
7 0 1235640 -22.186/-174.474 5.5 10 3.25 07 Nov 2018 13:55 21:44 (upd of #6)

Affected Provinces

Intensity Region Province Country Population
Tonga Tonga 37000 people

Affected populated places. Areas of interest

Intensity Name Region Province Country City class Population Distance
Ohonua Tonga Village 1200 people 106 km
Fuaamotu Tonga Village - 125 km
Fatumu Tonga Village - 128 km
Niutoua Tonga Village - 130 km
Mua Tonga Village - 131 km
Kolonga Tonga Village - 133 km
Pea Tonga Village - 138 km
Nuku'alofa Tonga Capital 24000 people 140 km
Houma Tonga Village - 143 km
Nukunuku Tonga Village - 146 km
Foui Tonga Village - 150 km

see full list


Critical infrastructure

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

Airports

Intensity Name IATA Code Elevation (m) Usage Runway type IFR Runway Length (ft) Distance
Eua Kaufana EUA unknown 0 103 km
Fua'amotu International TBU 38 Civ. Paved Yes 8700 126 km

Ports

Intensity Name LOCODE Country Distance
Eua Island Tonga 102 km
Nuku'alofa TOTBU Tonga 140 km
Ata Island Tonga 181 km

More information

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