M 5.5 in Guam on 27 Dec 2017 23:58 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: 14.76 Km
Lat/Lon: 12.0301 , 144.3807
Event Date: 27 Dec 2017 23:58 UTC
28 Dec 2017 09:58 Local
Exposed Population: No people within 100km
Source: NEIC us1000bwx7
Inserted at: 28 Dec 2017 00:17 UTC
INFORM Coping capacity of the alert score: 1.1 (Guam)

GDACS Score

For more info on GDACS alert score click here.
  Earthquake
(Shakemap)		 GDACS score
NEIC 0 0
us1000bwx7 Scaled population (vector) 0  
  C1 shakemap 0  
  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
1192350 0 27 Dec 2017 23:58 5.5M, 14.76km 2.98 N/A (in MMI>=VII) 00:19 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 Guam ,of Guam (population 83,067) . The alertlevel for this event is GREEN

Intensity Population
no people


Shakemaps Timeline

AlertShake id #ScoreepisodeidLat/LonMagnitudeDepthMax MMIDate shake (UTC)Delay (hh:mm) 
1 0 1192350 12.03/144.381 5.5 14.76 2.98 28 Dec 2017 00:19 00:21 (new episode)
2 0 1192350 12.03/144.381 5.5 14.76 2.98 28 Dec 2017 02:01 02:03 (upd of #1)

Affected Provinces

Intensity Region Province Country Population
Guam Guam 83000 people

Affected populated places. Areas of interest

Intensity Name Region Province Country City class Population Distance
Merizo Guam Village 1700 people 140 km
Inarajan Guam Village <1000 people 143 km
Umatac Guam Village - 144 km
Talofofo Guam Village 2700 people 152 km
Agat Guam Village 4400 people 152 km
Santa Rita Guam Village 1300 people 153 km
Ylig Guam Village - 155 km
Camp Bright Guam Village - 156 km
Yona Guam Village 2300 people 158 km
Piti Guam Village - 162 km
Camp Quezon Guam Village - 163 km
Sinajana Guam Village 2100 people 163 km
Asan Guam Village - 164 km
Hagåtña Guam Capital 1000 people 164 km
Mongmong Guam Village 3700 people 165 km
Barrigada Guam Village 4700 people 165 km
Tamuning Guam Village 11000 people 166 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
A.B. Won Pat International GUM 91 0 167 km

Ports

Intensity Name LOCODE Country Distance
Apra Harbor Guam 159 km
Apra (Agana) GUAPR Guam 160 km

More information

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