Abstract
Observations of auroral particles by rockets and satellites show the existence of structured “inverted V” type precipitation events with electron characteristic energies ranging up to several hundred eV in the post-noon dayside auroral region. Two station ground-based measurements from Cape Parry, NWT and Sachs Harbour, NWT, Canada from meridian scanners and auroral all-sky TV cameras are used in conjunction with rocket-borne electron measurements to study the temporal and spatial characteristics of the associated auroral emissions. The frequent occurrence of narrow, transient auroral arcs with lifetimes of 1–2 minutes, resulting from the inverted V events, is discussed.
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