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			 **   THE GEM MESSENGER   **
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                                                        Volume 19, Number 19
                                                               June 13, 2009
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GEM Focus Group "Substorm Expansion Onset: The First 10 Minutes":
Second Announcement
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From: Vassilis Angelopoulos (vassilis at ucla.edu)
      Kazuo Shiokawa (Shiokawa at stelab.nagoya-u.ac.jp)
      Andrei Runov (arunov at igpp.ucla.edu) 
      Shin Ohtani (ohtani at jhuapl.edu)

This is the 2nd announcement of the focus group "Expansion Onset: The First 
10 Minutes" for the upcoming GEM workshop in Snowmass (June 21-26, 2009; 
http://www.cpe.vt.edu/gem/index.html).  We thank those who responded to our 
1st announcement.  The final schedule is attached at the end of this 
announcement along with primary questions for each session.  We expect that 
each session will get filled quickly as the workshop approaches.  If you are 
interested in contributing to any session but have not responded yet, we 
would encourage you to send your discussion subject to Andrei Runov, the 
session coordinator, with c.c. to other conveners (e-mail addresses may be 
found at the top of this announcement).

We look forward to seeing you there.

Vassilis Angelopoulos, Kazuo Shiokawa, Andrei Runov, and Shin Ohtani

>>> Schedule of "Substorm Expansion Onset” Focus Group <<<

--- June 25 (Thu) ---
1) Onset Timing (10:30 – 12:15 AM)
What is the time sequence of onset-related phenomena observed in space and 
on the ground, and what are the implications for substorm initiation?

2) Onset Signature Propagation (1:30 – 3:00 PM)
How do onset-related signatures propagate in the magnetosphere?  How does 
the uncertainty of propagation time affect our understanding of substorm 
initiation?

3) M-I Coupling (3:30 – 5:00 PM)
How does aurora evolve around substorm onsets?  How are magnetospheric and 
ionospheric onset signatures connected in terms of auroral precipitation and 
currents, and what can we learn about substorm initiation from simultaneous 
ground-satellite observations?

--- June 26 (Fri) ---
4) Mapping (10:30 – 12:15 AM)
How does the presence and evolution of pre-onset and expansion-phase current 
systems affect the link between auroral and plasma sheet locations and 
processes?


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