The earthquake was the result of thrust faulting at the Sunda Trench . A rupture length of approximately ( and an unusually low rupture velocity of per second ) resulted in a duration of about 185 seconds ( just over three minutes ) for the event . The shock was centered from the trench , and about from the south coast of the island . A comparison was made with the earlier 2002 Sumatra earthquake , a M7 .5 submarine earthquake of a similar size that also occurred along the Sunda Arc and at a shallow depth , but one that did not result in a tsunami
2002 Sumatra earthquake
2002 Sumatra earthquake
2006 Pangandaran earthquake and tsunami