From cdeehr at gi.alaska.edu  Wed Jan 10 12:32:53 2007
From: cdeehr at gi.alaska.edu (Charles Deehr)
Date: Wed Jan 10 12:36:24 2007
Subject: [gse-aa] Auroral Alert Update
Message-ID: <000001c734fe$e63c7d90$ec1be589@Forcastle>

There are two sources of high speed solar wind on the sun now. They have
contributed to moderate auroral activity (Kp=3-5) during the periods Dec
19-25 and Jan 1-5. These "coronal holes" may be stable enough to last
through the next three solar rotations.

For those of you contemplating trips to the auroral zone this spring,
optimal periods are therefore: Jan 15-22, Jan 29-Feb 6, Feb 12-19, Feb
25-Mar 2, Mar 11-18, and Mar 24-30. Note that there may be active regions
appearing at any time and that a bright moon may detract from aurora
watching during the second and fourth periods.

Dr. Charles Deehr, Prof. Emer. Phys.     Ph. 907 474 7473 Fax 907 474 7290
email cdeehr@gi.alaska.edu
The Geophysical Institute                     
University of Alaska Fairbanks
903 Koyukuk Ave N             
Fairbanks, Alaska  99775-7320