Q: What was the Haiti earthquake on the Mercalli scale?
A: The Modified Mercalli Scale (MMI) reading of 2010 Haiti earthquake was an intensity of X.
According to the United States Geological Survey, intensity IX on the Modified Mercalli scale (MM) was recorded in Port-au-Prince.
The earthquake which occurred on 12 January 2010 was of magnitude 7.0 Mw with epicenter located 25 kilometres west of Port-au-Prince, the capital city of Haiti.