What is rector scale 8.8 in terms of Earthquakes?

Sumatra Earthquake in 2004 was largest in recent years

3-4: Minor

4-5: Light

5-6: Moderate

6-7: Strong

7-8:  Major

8-9: Heavy (most dangerous)

Sumatra Earthquake, in 2004, was largest in recent years. It measured 9.3 and triggered the devastating Asian tsunami.