M 4.5 in Tonga on 01 Jul 2016 00:30 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: 4.5M
Depth: 138.29 Km
Lat/Lon: -18.9465 , -174.6115
Event Date: 01 Jul 2016 00:30 UTC
01 Jul 2016 13:30 Local
Exposed Population:
About 23212 people within 100km
Source: NEIC us10005yza
Inserted at: 01 Jul 2016 01:45 UTC

GDACS Score

For more info on GDACS alert score click here.
  Earthquake GDACS score
NEIC n.a n.a
us10005yza Scaled population (vector) n.a  
  C1 earthquake n.a  
  C2 earthquake n.a  
  Country Vulnerability n.a  
  INFORM_normalised n.a  
Maximum expected impact using different data sources.

Episode Timeline

IDAlertScoreDateMag, DepthMMI*Population**Tsunami risk***Delay (hh:mm)Source
1132581 n.a 01 Jul 2016 00:30 4.5M, 138.29km N/A 20 thousand (in 100km) 01:14 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) .

Radius Population
100 km 23000 people
75 km 12000 people
50 km <1000 people
20 km <1000 people
10 km no people
5 km no people
2 km no people

Affected Provinces

Region Province Country Population
Tonga Tonga 98000 people

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 79 km
Haapai HPA 12 Civ. Unpaved Yes 3900 96 km

Ports

Name LOCODE Country Distance
Neiafu TONEI Tonga 75 km
Pangai TOPAN Tonga 98 km

More information

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