[Benno18 (Ben)]

Just need a bit of clarification for spaceweather.com.
Going to NZ next week, and the picture of the auroral oval and the 'Kp' index mean what??
Obviously the higher the number the higher the activity, but do you have to be under the 'cloud' to see it????
If not how far away can you be??
Also there is a red arrow on the picture. What does this mean??

Thanks in advance!!!
Benno