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In this paper we examine a total of 16 dipolarization events that were observed by THEMIS spacecraft in space close to\udgeosynchronous orbit, r < ~ 7 RE. For the identified events, we examine the characteristics of the plasma flows and associated\udbubbles as defined based on pV5/3, where p is the plasma pressure and V the volume of unit magnetic flux. First, we find that\udthe flow speed in the near-geosynchronous region is very low, mostly within a few tens of km/s, except for a very few events for\udwhich the flow can rise up to ~200 km/s but only very near the dipolarization onset time. Second, the bubble parameter, pV5/3,\uddecreases by a much smaller factor after the dipolarization onset than for the events in the farther out tail region. We suggest\udthat the magnetic dipolarization in the near-geosynchronous region generates or is associated with only very weak plasma\udbubbles. Such bubbles in the near-geosynchronous region would penetrate earthward only by a small distance before they\udstop at an equilibrium position or drift around the Earth

Plasma Flows and Bubble Properties Associated with the Magnetic Dipolarization in Space Close to Geosynchronous Orbit