M 4.2 in Indonesia on 20 Apr 2007 16:41 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: 4.2M
Depth: 157.1 Km
Lat/Lon: 2.3224 , 99.1559
Event Date: 20 Apr 2007 16:41 UTC
20 Apr 2007 23:41 Local
Exposed Population:
3370000 people within 100km
Source: NEIC
Inserted at: 21 Apr 2007 17:43 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
26631 0.5 20 Apr 2007 16:41 4.2M, 157.1km N/A 3.4 million (in 100km) 1d 01:01 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 Indonesia , Province of Sumatera Utara (population 9,319,344) . The nearest places are Medan, and Lagoeboti.

Radius Population
100 km 3.1 million people
75 km 1.5 million people
50 km 740000 people
20 km 490000 people
10 km 190000 people
5 km 2500 people
2 km <1000 people

Affected Provinces

Region Province Country Population
Sumatera Utara Indonesia 9.3 million people

Affected populated places

Name Region Province Country City class Population Distance
Lagoeboti Sumatera Utara Indonesia Village - 7 km
Medan Sumatera Utara Indonesia Major city 1.7 million people 153 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
Pinangsore 10 87 km

Ports

Name LOCODE Country Distance
Sibolga IDSLG Indonesia 74 km
Barus Indonesia 92 km

More information

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