This image shows the U.S. Geological Survey Shake Map of the April 6, 2009 Italy earthquake. According to the color code, at the epicenter, indicated by the star: -- the acceleration of the ground was from 14% to 26% of the acceleration of gravity -- the speed of the ground was from 12 cm/sec to 23 cm/sec. -- See the whole Shake Map For a brief history of earthquakes in Italy, see BBC News: Italy's Earthquake History.
