Anomalies are ranked in difficulty by 10 levels, these are:

* (Faction) Burrow / Drone Collection (lowest)
* (Faction) Hideaway / Drone Cluster
* (Faction) Refuge / Drone Gathering
* (Faction) Den / Drone Gathering
* (Faction) Yard / Drone Surveillance
* (Faction) Rally Point / Drone Menagerie
* (Faction) Port / Drone Herd
* (Faction) Hub / Drone Squad
* (Faction) Haven / Drone Patrol
* (Faction) Sanctum / Drone Horde (hardest)

Gravimetric = mining
Ladar = Gas
Magnetometric = Arch/Salvage
Radar = Hacking

Magnetometric = Gallente = Ion Field = teal
Ladar = Minnie = phase inverter = crimson
Radar = Amarr = White Noise = tan
Gravimetric = Ca

(source: Flashrain)