(a) Difference between mean gravity changes of 2010 March–2011 February and 2011 April–2012 March estimated from the post-processed CSR RL06 GRACE data with SH degree up to 60. (b) Surface mass changes in millimeter of equivalent water height (EWH) computed from (a). (c) FM result based on the distribution of (b). The ocean signals are barely seen because of the small intensity compared to the land mass change signals.