Which earthquake has the longest known rupture length?

The 26 December 2004 Sumatra–Andaman earthquake was so large that the rupture extended for roughly 1,300 kilometers along the subduction zone. That extraordinary fault break helped generate the devastating Indian Ocean tsunami. The earthquake reached about magnitude 9.1 to 9.3 and lasted several minutes. Long ruptures like this are characteristic of the planet’s greatest megathrust earthquakes. It is one of the most important events ever studied in plate tectonics and tsunami science.