🌌 Aurora Borealis

Solar wind intensity (storm strength): 4.0

Particle energy: 8.0 keV

Show dipole field lines Auto-rotate camera

Kp-index estimate—

Dominant emission—

Precipitation rate—

Stop altitude (energy)—

Loss-cone @ current L—

Dipole field & mirroring
r = L·cos²λ (field-line shape)
B(λ)/B_eq = √(1+3sin²λ)/cos⁶λ
sin²α_loss = B_eq/B_atm — pitch angles below α_loss precipitate; the rest mirror back.

O green 557.7nm ~100-150km O red 630nm ~200-300km N₂ blue/violet ~100km