GDACS is a cooperation framework between the United Nations, the European Commission and disaster managers worldwide to improve alerts, information exchange and coordination in the first phase after major sudden-onset disasters.

Overall Green Earthquake alert in Indonesia on 21 Apr 2012 01:16 UTC
Tsunami calculation for earthquake Earthquake in Indonesia

The JRC has developed a global tsunami wave height calculation model, which is run after each earthquake issued by seismological institutes around the world.

This report is for earthquake episode 116355 of event 116343 issued at 21 Apr 2012 01:16 (GDACS Event ID 116343, Latest episode ID: 116355, inserted at 21 Apr 2012 04:40 UTC ).


Current impact estimate:

  • The tsunami calculation is running.
  • Green alert in Indonesia on 21/04/2012 01:16:52 UTC
  • 160000 people within 100km
  • Magnitude 6.6M, Depth:16km
A pre-calculated grid scenario is also available here
Population density map


Tsunami maximum wave height
Tsunami maximum wave height (Source: JRC)

See animation

Affected locations

No locations affected.

Initial conditions (+)

More information

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

Official tsunami bulletins by regional warning centers can be found at the International Tsunami Information Center.