TY - JOUR PB - American Physical Society ID - 10.1103/PhysRevFocus.5.30 TI - An Unnatural Aurora JF - Physical Review Focus JA - Phys. Rev. Focus J1 - FOCUS VL - 5 IS - SP - 30 EP - PY - 2000/06/30/ UR - http://link.aps.org/doi/10.1103/PhysRevFocus.5.30 A1 - Anonymous, ER -