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Report on the Dec. 5, 1993 GEM Mini-Workshops
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GEM WORKING GROUP 3: CURRENT SYSTEMS AND MAPPINGS
                C. T. Russell and R. L. Lysak (Co-chairs)

The Working Group met from 3:30 to 5:45 pm Sunday December 5
in the Holiday Inn Golden Gateway Hotel to follow up on issues
raised at the 1993 Snowmass meeting. The principal topic of 
concern was the phenomenon known as the Traveling Convection 
Vortex which appears to be a strong filament of field aligned 
current that moves roughly from noon toward dusk at high latitudes and
appears to weaken rapidly post terminator. These groups reported 
on new aspects of their work: Zesta and Hughes, Sitar and Clauer,
and Lanzerotti. The most important development in this area is that
the coverage at very high latitudes is now quite good from the 
Danish magnetometers on the eastern shore of Greenland, across the 
Greenland icecap with the MAGIC array, along the west shore of 
Greenland (completing the Danish array) and across northern Canada 
(the MACSS array) to Resolute Bay. While many interesting results
are being obtained by the individual groups studying these records,
the time is now ripe for a coordinated effort studying events as
they move across the entire network.

There will be a change in leadership of the Working Group beginning 
with the June Snowmass meeting. The present leadership is stepping 
aside and Nancy Crooker and Eigil Friis-Christensen will be
taking the helm. We wish the new chairs good luck in this endeavor
and thank all of you for your support of the working Group.