What did the earthquake measure on the richer scale in the Indian Ocean?

The earthquake that occurred in the Indian ocean on December 26, 2004, measured 9.1 to 9.3 on the moment magnitude scale, which is the modern equivalent of the Richter scale. This powerful earthquake triggered a massive tsunami that affected several countries around the Indian Ocean, resulting in significant loss of life and widespread destruction. It remains one of the deadliest natural disasters in history.