As of 11 a.m. Saturday, 145 aftershocks measuring 4 or higher on the Richter scale had been monitored since the 7.8-magnitude earthquake that rocked southwest China's Sichuan Province Monday, according to the China Seismological Bureau.

The biggest aftershock reported so far is a 6.1-magnitude quake at 3:07 p.m. on Tuesday. Quakes at or above 5 on the Richter scale numbered 23.

(Xinhua News Agency May 17, 2008)