M 5.6 in Guam on 16 May 2017 03:56 UTC

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: 5.6M
Depth: 65.48 Km
Lat/Lon: 12.7805 , 145.1188
Event Date: 16 May 2017 03:56 UTC
Exposed Population: 160000 people within 100km
Source: NEIC us10008snf
Inserted at: 16 May 2017 04:18 UTC

Gdacs Score

For more info on GDACS alert score click here.

Episode Timeline

IDAlertScoreDateMag, DepthMax Intensity (MMI*)Pop [100 km or MMI 9-7]Tsunami risk (max height)Delay (hh:mm)Source
1167955 0 16 May 2017 03:56 5.5M, 40.3km N/A No people affected 00:15 PTWC
1167957 0.26 16 May 2017 03:56 5.6M, 65.48km N/A 160 thousand 00:21 NEIC

Exposed population

The earthquake happened in Guam , of Guam (population 143,173) . The nearest places are Inarajan, and Hagåtña.

Radius Population
100 km 160000 people
75 km 4300 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
Guam Guam 140000 people
Northern Mariana Is. Northern Mariana Islands 60000 people

Affected populated places

Name Region Province Country City class Population Distance
Inarajan Guam Village5 <1000 people 68 km
Hagåtña Guam Capital 1000 people 86 km

see full list

Critical infrastructure

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


Name IATA Code Elevation (m) Usage Runway type IFR Runway Length (ft) Distance
A.B. Won Pat International GUM 91 0 85 km
Andersen AFB UAM 191 0 92 km


Name LOCODE Country Distance
Apra (Agana) GUAPR Guam 87 km
Apra Harbor Guam 91 km

More information

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