May 20 (CHENGDU) -- An aftershock of six to seven on the Richter scale was likely to happen in the Wenchuan earthquake area in southwest China's Sichuan Province, said local seismological bureau.

The Sichuan Seismological Bureau said there was a bigger possibility of the aftershock between Monday and Tuesday, warning local government and people to be prepared for emergencies.

Editor: Haijing Qu