Pacific Coastal and Marine Science Center
Tsunamis and Earthquakes
Tsunami Generation from the 2004 M=9.1 Sumatra-Andaman Earthquake
Base map of the Sumatra subduction zone showing seismicity associated with the 2004 Sumatra-Andaman earthquake
Aftershocks (yellow circles) occur in geographic proximity to the main shock rupture zone, extending from northern Sumatra to the Andaman Islands.