M 6.4 in Guam on 23 Sep 2018 05:52 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: 6.4M
Depth: 10 Km
Lat/Lon: 12.2094 , 146.214
Event Date: 23 Sep 2018 05:52 UTC
23 Sep 2018 15:52 Local
Exposed Population: No people within 100km
Source: NEIC us2000hiwb
Inserted at: 23 Sep 2018 06:13 UTC
INFORM Coping capacity of the alert score: 1.1 (Guam)

GDACS Score

For more info on GDACS alert score click here.
  Earthquake
(Shakemap)		 Tsunami GDACS score
NEIC 0 0.1 0.1
us2000hiwb Scaled population (vector) 0 Max wave alert 0.1m  
  C1 shakemap -0.59 Max wave realtime 0.13m  
  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
1229281 0.1 23 Sep 2018 05:52 6.4M, 10km 3.32 N/A (in MMI>=VII) 0.1m (at 00:18) 00:21 NEIC
1229317 0 23 Sep 2018 05:52 5.9M, 10km 3.33 N/A (in MMI>=VII) 09:06 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 15,847) . The alertlevel for this event is GREEN

Intensity Population
no people
2900 people


Shakemaps Timeline

AlertShake id #ScoreepisodeidLat/LonMagnitudeDepthMax MMIDate shake (UTC)Delay (hh:mm) 
1 0 1229281 12.209/146.214 6.4 10 3.24 23 Sep 2018 06:14 00:22 (new episode)
2 0 1229281 12.209/146.214 6.4 10 3.32 23 Sep 2018 07:54 02:02 (upd of #1)
3 0 1229317 12.209/146.214 6.4 10 3.32 23 Sep 2018 14:59 09:07 (new episode)
4 0 1229317 12.216/146.243 5.9 10 3.33 23 Sep 2018 15:00 09:08 (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 199 km
Talofofo Guam Village 2700 people 203 km
Ylig Guam Village - 204 km
Merizo Guam Village 1700 people 204 km
Yona Guam Village 2300 people 205 km
Camp Quezon Guam Village - 205 km
Asatdas Guam Village - 207 km
Umatac Guam Village - 207 km
Barrigada Guam Village 4700 people 207 km
Upi Guam Village - 209 km
Tamuning Guam Village 11000 people 210 km
Sinajana Guam Village 2100 people 211 km
Mongmong Guam Village 3700 people 211 km
Dededo Guam Village 3300 people 211 km
Hagåtña Guam Capital 1000 people 211 km
Santa Rita Guam Village 1300 people 212 km
Agat Guam Village 4400 people 213 km
Asan Guam Village - 214 km
Camp Bright Guam Village - 215 km
Piti Guam Village - 216 km
Rota Northern Mariana Islands Village - 241 km
Teteto Northern Mariana Islands Village - 243 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 0 207 km
A.B. Won Pat International GUM 91 0 209 km
Rota I International ROP 185 Civ. Paved Yes 6000 242 km

Ports

Intensity Name LOCODE Country Distance
Apra (Agana) GUAPR Guam 215 km
Apra Harbor Guam 221 km
Rota Northern Mariana Islands 242 km

More information

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