M 6 in Tonga on 18 Oct 2017 12:00 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: 6.0M
Depth: 10 Km
Lat/Lon: -20.5981 , -173.8949
Event Date: 18 Oct 2017 12:00 UTC
18 Oct 2017 00:00 Local
Exposed Population: About 800 people within 100km
Source: NEIC us1000atnb
Inserted at: 18 Oct 2017 12:25 UTC
INFORM Coping capacity of the alert score: 1.1 (Tonga)

GDACS Score

For more info on GDACS alert score click here.
  Earthquake
(Shakemap)		 Tsunami GDACS score
NEIC 0 0 0
us1000atnb Scaled population (vector) 0 Max wave scenario 0m  
  C1 shakemap 0 Max wave realtime 0m  
  C2 shakemap 0      
  Country Vulnerability 0      
  INFORM_normalised 0      
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
1184371 0 18 Oct 2017 12:00 6M, 10km 3.98 N/A (in MMI>=VII) 0m (at 00:00) 00:24 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 18,805) . The alertlevel for this event is GREEN

Intensity Population
no people
no people


Shakemaps Timeline

AlertShake id #ScoreepisodeidLat/LonMagnitudeDepthMax MMIDate shake (UTC)Delay (hh:mm) 
1 0 1184371 -20.598/-173.895 6 10 3.75 18 Oct 2017 12:26 00:25 (new episode)
2 0 1184371 -20.598/-173.895 6 10 3.98 18 Oct 2017 14:03 02:02 (upd of #1)

Affected Provinces

Intensity Region Province Country Population
Tonga Tonga 19000 people
Tonga Tonga 32000 people

Affected populated places. Areas of interest

Intensity Name Region Province Country City class Population Distance
Pangai Tonga Village 1700 people 99 km
Kolonga Tonga Village - 137 km
Mua Tonga Village - 143 km
Fatumu Tonga Village - 144 km
Niutoua Tonga Village - 134 km
Ohonua Tonga Village 1200 people 137 km
Fuaamotu Tonga Village - 149 km
Nuku'alofa Tonga Capital 24000 people 150 km
Pea Tonga Village - 153 km
Nukunuku Tonga Village - 158 km
Houma Tonga Village - 159 km
Foui Tonga Village - 161 km
Neiafu Tonga Village 4300 people 216 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
Haapai HPA 12 Civ. Unpaved Yes 3900 102 km
Fua'amotu International TBU 38 Civ. Paved Yes 8700 148 km
Eua Kaufana EUA unknown 0 140 km
Vavau International VAV 72 Civ. Unpaved Yes 5500 223 km

Ports

Intensity Name LOCODE Country Distance
Pangai TOPAN Tonga 101 km
Eua Island Tonga 135 km
Nuku'alofa TOTBU Tonga 149 km
Neiafu TONEI Tonga 216 km
Ata Island Tonga 306 km

More information

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