Peak Ground Acceleration of Tohoku Earthquake The Wikipedia article titled 2011 T hoku earthquake and tsunami shows the peak ground acceleration of the March 11 quake at 2 99 g on the right sidebar and has the statement Japan s National Research Institute for Earth Science and Disaster Prevention NIED calculated a peak ground acceleration of 2 99 g 29 33 m s under the heading Energy The Wikipedia article titled Fukushima I nuclear accidents has the statement The 9 0 MW T hoku earthquake at 14 46 JST on Friday 11 March 2011 resulted in maximum ground accelerations of 0 56 0 52 0 56 g 5 50 5 07 and 5 48 m s2 at units 2 3 and 5 respectively under the heading Direct effect of the earthquake and tsunami Is this because the ground acceleration at units 2 3 and 5 is a local ground accelration at the reactors while the 2 99 g mentioned in the Tohoku Eartqauke article was measured at the epicenter The information indicated for peak ground acceleration between the two articles is somewhat confusing