This was a small-scale study, but Prof Nicolson says the results are on a par with those achieved by the large-scale reading recovery scheme in the early 1990s.
The tweets linked to pictures, including one of feet on a scalereading 214 pounds, and another one of Ai and an unidentified male peering into the camera.
For example, the 1989 San Francisco earthquake, which killed 63 people, had the same Richter scalereading as the 2010 earthquake that killed an estimated 100, 000 to 200, 000 in Haiti.