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The K7RA Solar Update
SEATTLE, WA, Nov 26, 2003--This short
propagation update is going out early, since ARRL headquarters will be closed
Thursday and Friday for the Thanksgiving holiday. We'll report sunspot numbers,
solar flux and A indices for November 20-26 in a subsequent bulletin during the
week of December 1.
Solar flux and sunspot numbers are expected
to trend slightly lower than now. Solar flux for the past week has been running
from 171 to 178, and for the CQ World Wide DX Contest CW the weekend of
November 29-30, values should run 15 to 20 points lower.
After settling down over the next two days,
geomagnetic conditions are expected to be quiet, which should be great news for
contesters.
For a last-minute propagation assessment
before the contest weekend, check the NW7US site. To see which way
the interplanetary magnetic field is pointing, check SpaceWeather.com. This information appears
under the heading "Interplanetary Mag. Field"--just below the sunspot number on
the left-hand side of the page. If it is pointing north, which it was as of
about 1630 UTC today, conditions should be fairly quiet and stable--even if
there is a strong solar wind.
Amateur solar observer Tad Cook, K7RA,
Seattle, Washington, provides this weekly report on solar conditions and
propagation. This report also is available via W1AW every Friday and an
abbreviated version also appears in The ARRL Letter. Readers
may contact the author via k7ra@arrl.net.
Page last modified: 12:50 PM, 26 Nov 2003 ET
Page author: awextra@arrl.org
Copyright © 2003, American Radio Relay League, Inc. All Rights Reserved.
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