Variability of dayside high latitude convection associated with a sequence of auroral transients

10 second resolution ionospheric convection data covering the invariant latitude rang from 71 degrees to 76 degrees, obtained by using the EISCAT UHF and VHF radars, are combined with optical data from Ny Alesund during a sequence of amoral transients in the post noon sector (similar to 15 MLT). Satellite observations of polar cap convection patterns suggest negative B-Z and B-Y components of the interplanetary magnetic field. Burst-like enhancements of westward (sunward) post-noon convection were accompanied by eastward moving auroral forms at higher latitudes, above the convection reversal boundary. In this case the background convection was weak, whereas the integrated potential drop across the radar held-of-view associated with the westward how bursts was typically similar to 20-35 kV. The auroral phenomenon consists of a series of similar events with a mean repetition period of 8 min. A close correlation between the auroral activity and convection enhancements in the cleft ionosphere is demonstrated.