Where's the Cusp?
Where's the Cusp?
Where's the Cusp?
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Optical <strong>Cusp</strong> Signatures• Sandholt, et al. AuroralTypes• Type 1a and 1b– Mergingline and throat PMAFs,respectively. Occur onopen or closed field linesfor IMF Bz S or N,respectively.• Type 2 – Discrete arcs onopen field linesconvecting poleward.• Type 3 – Pulsating aurorainside trapping boundary.• Type 4&5Thirty Years of Aeronomical Signatures of <strong>the</strong> Magnetospheric <strong>Cusp</strong> 18