M 5.5 in Guam on 17 May 2018 18:47 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: 45.06 Km
Lat/Lon: 13.0097 , 145.3498
Event Date: 17 May 2018 18:47 UTC
18 May 2018 04:47 Local
Exposed Population: 160000 people within 100km
Source: NEIC us1000e7fv
Inserted at: 17 May 2018 20:43 UTC

GDACS Score

For more info on GDACS alert score click here.
  Earthquake
(Shakemap)		 GDACS score
NEIC 0 0
us1000e7fv Scaled population (vector) 0  
  C1 shakemap -0.59  
  C2 shakemap 0.53  
  Country Vulnerability 0  
  INFORM_normalised 1  
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
1210980 0 17 May 2018 18:47 5.5M, 36.99km 3.66 N/A (in MMI>=VII) 00:19 NEIC
1210992 0 17 May 2018 18:47 5.5M, 45.06km 3.61 N/A (in MMI>=VII) 01:56 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 35,997) . The alertlevel for this event is GREEN

Intensity Population
no people
1000 people


Shakemaps Timeline

AlertShake id #ScoreepisodeidLat/LonMagnitudeDepthMax MMIDate shake (UTC)Delay (hh:mm) 
1 0 1210980 12.993/145.34 5.5 36.99 3.66 17 May 2018 19:10 00:23 (new episode)
2 0 1210992 12.993/145.34 5.5 36.99 3.66 17 May 2018 20:43 01:56 (new episode)
3 0 1210992 13.01/145.35 5.5 45.06 3.61 17 May 2018 20:45 01:58 (upd of #2)
4 0 1210992 13.01/145.35 5.5 45.06 3.61 17 May 2018 20:51 02:03 (upd of #3)

Affected Provinces

Intensity Region Province Country Population
Guam Guam 150000 people

Affected populated places. Areas of interest

Intensity Name Region Province Country City class Population Distance
Inarajan Guam Village <1000 people 72 km
Talofofo Guam Village 2700 people 75 km
Ylig Guam Village - 76 km
Camp Quezon Guam Village - 76 km
Yona Guam Village 2300 people 76 km
Asatdas Guam Village - 78 km
Barrigada Guam Village 4700 people 78 km
Merizo Guam Village 1700 people 79 km
Umatac Guam Village - 81 km
Upi Guam Village - 81 km
Tamuning Guam Village 11000 people 81 km
Dededo Guam Village 3300 people 82 km
Mongmong Guam Village 3700 people 82 km
Sinajana Guam Village 2100 people 82 km
Hagåtña Guam Capital 1000 people 83 km
Santa Rita Guam Village 1300 people 85 km
Agat Guam Village 4400 people 85 km
Asan Guam Village - 86 km
Piti Guam Village - 87 km
Camp Bright Guam Village - 87 km
Rota Northern Mariana Islands Village - 128 km
Teteto Northern Mariana Islands Village - 129 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
Andersen AFB UAM 191 0 79 km
A.B. Won Pat International GUM 91 0 80 km
Rota I International ROP 185 Civ. Paved Yes 6000 129 km

Ports

Intensity Name LOCODE Country Distance
Apra (Agana) GUAPR Guam 87 km
Apra Harbor Guam 93 km
Rota Northern Mariana Islands 126 km

More information

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