Magnetic field strength in NZ?

Does anyone know roughly how many mG it is? Of course this is on topic for NZNOG. I need to ahhh... uhhh... measure electron deviation in network gear made for Northern Hemisphere magnetic conditions. ;-) -- Juha Saarinen - To unsubscribe from nznog, send email to majordomo(a)list.waikato.ac.nz where the body of your message reads: unsubscribe nznog