M 4.9 in Tonga on 30 Jun 2018 21:01 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: 52.92 Km
Lat/Lon: -18.6407 , -174.5715
Event Date: 30 Jun 2018 21:01 UTC
01 Jul 2018 10:01 Local
Exposed Population:
About 15000 people within 100km
Source: NEIC us2000fsjd
Inserted at: 30 Jun 2018 21:28 UTC
INFORM Coping capacity of the alert score
4.6 (Tonga)

GDACS Score

For more info on GDACS alert score click here.
  Earthquake GDACS score
NEIC 0 0
us2000fsjd Scaled population (vector) 3.9  
  C1 earthquake 1  
  C2 earthquake 0  
  Country Vulnerability 0  
  INFORM_normalised 0.94  
Maximum expected impact using different data sources.

Episode Timeline

IDAlertScoreDateMag, DepthMMI*Population**Tsunami risk***Delay (hh:mm)Source
1217211 0 30 Jun 2018 21:01 4.9M, 52.92km N/A 20 thousand (in 100km) 00:26 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 and Neiafu.

Radius Population
100 km 15000 people
75 km 15000 people
50 km <1000 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
Niue Niue 2000 people

Affected populated places

Name Region Province Country City class Population Distance
Neiafu Tonga Village 4300 people 62 km

see full list

Critical infrastructure

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

Airports

Name IATA Code Elevation (m) Usage Runway type IFR Runway Length (ft) Distance
Vavau International VAV 72 Civ. Unpaved Yes 5500 65 km

Ports

Name LOCODE Country Distance
Neiafu TONEI Tonga 63 km

More information

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