為什麼路透社說雅安地震6.6級，汶川地震7.9級？

The 6.6 magnitude quake struck in Lushan county, near the city of Ya"an in the southwestern province of Sichuan, close to where a devastating 7.9 quake hit in May 2008, killing 70,000. Rescuers struggle to reach China quake zone as toll climbs
| Reuters

不談震級種類光說震級大小的統統都是耍流氓！

國內說的7級地震，是Ms，指利用面波振幅算出來的面波震級。
路透社（應該參考的是USGS的結果）報道的6.6級地震，是Mw，指利用地震矩算出來的矩震級。