M 4.6 in Samoa on 29 Sep 2009 19:57 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: 10 Km
Lat/Lon: -15.1717 , -173.135
Event Date: 29 Sep 2009 19:57 UTC
29 Sep 2009 07:57 Local
Exposed Population:
no people within 100km
Source: NEIC
Inserted at: 30 Sep 2009 16:56 UTC

GDACS Score

For more info on GDACS alert score click here.
  Earthquake GDACS score
NEIC 0.5 0.5
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
66378 0.5 29 Sep 2009 19:59 5.2M, 27km N/A No people affected (in 100km) 00:24 GEOFON
66465 0.5 29 Sep 2009 19:59 5.3M, 30km N/A No people affected (in 100km) 10:40 EMSC
66535 0.5 29 Sep 2009 19:57 4.6M, 10km N/A No people affected (in 100km) 20:59 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 Samoa , of Samoa (population 159,000) .

Radius Population
100 km no people
75 km no 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
Samoa Samoa 160000 people
Tonga Tonga 98000 people
American Samoa American Samoa 53000 people
Niue Niue 2000 people

Critical infrastructure

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

More information

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