hat
Mayetik Gram Sundsvall. devyasyon gwo nan jaden an mayetik bay monte nan plis limyè nò. BZ (vèt) va pi ba pase liy (minusladdat) pou Northern Limyè yo dwe wè. sous.
eng
Magneto Gram Sundsvall. Larger deviations in the magnetic field gives rise to more northern lights. Bz (green) must be below the line (minusladdat) Northern lights to be seen. Source.