The Superhero Database Classification number, or SHDB Class, is a number that represents the overall 'power' of a character. All traits of a character are used for calculating the Classification.
What it DOESN'T mean
This doesn't mean that a higher class would always beat a lower class character. But the bigger the difference in Class is, the more obvious it is who'll win in a fight.
How is this calculated
( INT^1.3 + (STR*0.5 )^2 + (SPE*0.5)^2 + DUR^1.6 + (POW + (SPS*SPL))^2 + COM^1.8 ) ^ TIER
Super Power Score and Level
Every Super Power has a score (SPS) that is used to calculate the Class. Each Super Power also has 3 levels (SPL). The level is set when connecting that Super Power to a character. The level determines the final score, of the Super Power, being used in the calculation.
Earthquake is one of the Imperial Guard's smartest and most capable members. This alien warrior has the ability to control silicate matter and cause mini-earthquakes. His grey skin is actually super-dense, making it almost impossible to penetrate.
When the Shi'ar Empire decided that Jean Grey needed to die (because of her possession of the Pheonix Force), Earthquake was one of the eight warriors selected to fight the X-Men. This fight was of utmost importance, and the outcome would decide Jean's fate. Earthquake has always been one of the most capable Imperial Guardsmen, and he always will be.