Linked from
The 28 pages that link to 2004 Indian Ocean earthquake and tsunami, each with the reason it gives.
Sunda ArcBroader topic: Its rupture occurred along the Sunda subduction boundary west of the arc.
Sunda TrenchBroader topic: Its rupture began on the Sunda megathrust near the trench.
Surface waveRelated: Its long seismic rupture produced surface waves recorded around the world.
AcehRelated: Aceh was among the regions most devastated by the tsunami.
2000sBroader topic: The disaster prompted an unprecedented international relief response.
KalmunaiRelated: The tsunami caused severe destruction and loss of life along Kalmunai’s coast.