ENERGETIC ELECTRON INJECTIONS INTO THE INNER MAGNETOSPHERE DURING THEJAN. 10-11, 1997 MAGNETIC STORM

At the end of the main phase of the Jan. 10-11, 1997 magnetic storm, a rapid enhancement of 0.4-1.6 MeV electrons across L = 4.2-6 was measu red by particle detectors on the Solar, Anomalous, and Magnetospheric Particle Explorer (SAMPEX) and three Global Positioning System (GPS) s atellites. This enhancement, over two orders of magnitude at L = 4.2-5 , occurred around 11:00 UT on Jan. 10, when the AE index reached simil ar to 2000 nT and when a solar wind pressure pulse arrived. Using data from multiple satellites and ground stations, we determine that the r apid enhancement of 0.4-1.6 MeV electrons in the magnetosphere at L = 4.2-6 was due to a combination of intense substorm activity during the early part of the magnetic storm which produced a source population a nd the following pressure pulse which quickly energized some of these electrons by moving them into stronger magnetic field.