The 1839 Ava earthquake, also known as the Amarapura earthquake or Inwa earthquake was a disastrous seismic event that struck central Burma on the morning of March 23. This earthquake with a moment magnitude as high as 8.3, was one of the biggest in the country since 1762. Shaking reached XI (Extreme) on the Modified Mercalli intensity scale, and was felt in Rangoon and Bhamo.