Where's the Cusp?

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Solar Wind PressurePressure Pulseaurora has thecharacteristics ofimpulsivepenetration.Thirty Years of Aeronomical Signatures of the Magnetospheric Cusp 30
Cusp Summary• The ionospheric signatures of the cusp are all in agreementthat it is about 6 to 8 hours wide in MLT, centered on magneticnoon.• The diaroic region of the cusp is 2 to 4 hours wide, centeredon noon.• The dayside aurora, like the nightside aurora, is looselyseparated by the trapping boundary into diffuse and discreteaurora. Both types, however, are controlled mainly by IMFprocesses at the magnetopause.• The dayside diffuse aurora is on closed field lines (LLBL) withhard precipitation, and field line resonance effects.• The dayside discrete aurora is on either newly opened ornewly closed field lines, softer precipitation, and associatedwith the cusp.Thirty Years of Aeronomical Signatures of the Magnetospheric Cusp 31
Page 1 and 2: Where’s the Cusp?Thirty Years of
Page 3 and 4: Magnetospheric Cusps• Thought of
Page 5 and 6: Low Altitude Satellite Cusp• The
Page 7 and 8: Low Altitude Satellite Cusp• Appr
Page 9 and 10: Nightside/Dayside Aurora• Equator
Page 11 and 12: Nightside/Dayside Relationship• P
Page 13 and 14: Nightside/Dayside Relationship• A
Page 15 and 16: Optical Cusp Signatures• We obser
Page 17 and 18: Optical Cusp Signatures• Cogger
Page 20 and 21: Optical Cusp Signatures• PMAFs 6h
Page 22 and 23: Magnetic Cusp Signatures• Magneti
Page 24 and 25: Incoherent Radar Cusp Signatures•
Page 26 and 27: • Plasmatransfer (nightand day) i
Page 28 and 29: Viscous InteractionThirty Years of

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