Much of the attention given to Pi 2 pulsations has resulted from their close relationship with substorm onsets. Most of the observations have been from ground-based observatories, with few observations in space. Consequently, there are problems in determining the extent of the pulsation region in the magnetosphere and in clarifying the substorm process from information contained in the Pi 2 signal. To further our understanding of Pi 2's and substorms, simultaneous Pi 2 observations from the ground, using the AFGL magnetometer network, and from space, using GOES 2 and 3 satellites, are presented. The observations indicate that the Pi 2 signal in space is often localized such that synchronous satellites separated by 30¿ see quite different field signatures. In contrast to this, on the ground at mid-latitudes, similar features are often observed across the 60¿ width of the AFGL magnetometer network. In addition, when Pi 2's occur, as indicated by ground observations, their observation at synchronous orbit near midnight is more likely during times of large rather than small Kp. These results are interpreted in terms of the plasma sheet model which has previously been used to explain some of the observed properties of Pi 2 pulsations.