R R Anderson, D A Gurnett, J D Scudder, L A Frank, and J B Sigwarth, The University of Iowa, Department of Physics and Astronomy, Iowa City, IA 52242, USA, Phone:319-335-1924, FAX: 319-335-1753, e.mail: anderson@iowave.physics.uiowa.edu

H Matsumoto, K Hashimoto, H Kojima and Y Kasaba, Radio Atmospheric Science Center, Kyoto University, Uji, Kyoto 611, Japan

M L Kaiser, NASA/Goddard Space Flight Center, Greenbelt, MD 20771, USA

G Rostoker, Department of Physics, University of Alberta, Edmonton, Alberta, Canada T6G 2Jl

J-L Bougeret and J-L Steinberg, DESPA-URA CNRS 264, Observatoire de Paris-Meudon, F-91295 Meudon Cedex, France

I Nagano, Department of Electrical and Computer Engineering, Kanazawa University, Kanazawa 920, Japan

H J Singer and T G Onsager, Space Environment Center, NOAA, Boulder, CO, 80303, USA

A pair of substorms occurred around 08 UT on January 12, 1997, that were observed by numerous instruments that were a part of the ISTP mission. The GEOTAIL Plasma Wave Instrument (PWI) at 28 Re down the tail and the WIND WAVES experiment upstream at X=117 Re and Y=-54 Re detected enhanced auroral kilometric radiation (AKR) and a LF burst. POLAR was inbound at 7.5 Re near 07 MLT. The POLAR PWI detected the enhanced AKR that included expanded upper and lower frequency cutoffs. The POLAR HYDRA experiment observed plasma sheet ions and electrons that were of higher energy than normal. Many of the CANOPUS ground magnetometer stations were able to identify both substorms and track their movement. Negative bays near -1000 nT were observed. Large structured injections of protons and electrons were observed by GOES 8 and 9. Images from the POLAR VIS Earth Camera operating in the far-UV range showed a strong aurora with injections deep into the ring current. These images along with the other observations detail the dynamics of the plasma associated with these strong substorms.