M 4.6 in Guam on 28 Sep 2012 12:11 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: 4.6M
Depth: 110.3 Km
Lat/Lon: 13.4852 , 144.475
Event Date: 28 Sep 2012 12:11 UTC
28 Sep 2012 22:11 Local
Exposed Population:
170000 people within 100km
Source: NEIC usc000cxia
Inserted at: 28 Sep 2012 12:32 UTC

GDACS Score

For more info on GDACS alert score click here.
  Earthquake GDACS score
NEIC 0.5 0.5
usc000cxia 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
119913 0.5 28 Sep 2012 12:11 4.6M, 110.3km N/A 170 thousand (in 100km) 00:21 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 143,173) . The nearest places are and Hagåtña.

Radius Population
100 km 170000 people
75 km 170000 people
50 km 170000 people
20 km 6500 people
10 km no people
5 km no people
2 km no people

Affected Provinces

Country Region Province Population
Guam Guam 140000 people

Affected populated places

Name Region Province Country City class Population Distance
Hagåtña Guam Capital 1000 people 27 km

see full list

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
A.B. Won Pat International GUM 91 32 km
Andersen AFB UAM 191 47 km

Ports

Name LOCODE Country Distance
Apra Harbor Guam 14 km
Apra (Agana) GUAPR Guam 20 km

More information

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