M 4.6 in Philippines on 21 Jan 2011 00:55 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: 22.9 Km
Lat/Lon: 16.3654 , 121.261
Event Date: 21 Jan 2011 00:55 UTC
21 Jan 2011 08:55 Local
Exposed Population:
5580000 people within 100km
Source: NEIC usc000176l
Inserted at: 21 Jan 2011 02:08 UTC

GDACS Score

For more info on GDACS alert score click here.
  Earthquake GDACS score
NEIC 0.5 0.5
usc000176l 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
103414 0.5 21 Jan 2011 00:55 4.6M, 22.9km N/A 5.6 million (in 100km) 01:13 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 Philippines , Region of Cagayan Valley (population 2,341,000) .

Radius Population
100 km 6.1 million people
75 km 2.9 million people
50 km 810000 people
20 km 190000 people
10 km 13000 people
5 km 4300 people
2 km <1000 people

Affected Provinces

Country Region Province Population
Philippines Cagayan Valley 2.3 million people
Philippines Central Luzon 6.2 million people
Philippines Cordillera Administrative Region 1.1 million people
Philippines Ilocos 3.6 million people
Philippines Southern Tagalog 8.3 million people

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
Bagabag 249 Civ. Paved No 3200 31 km
Luzon Is Cubi Pt NCP unknown 46 km

Ports

Name LOCODE Country Distance
Baler Philippines 72 km
Casiguaran Philippines 94 km

More information

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