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ARRL Propagation Bulletin ARLP027 (2002)

ARLP027 Propagation de K7VVV

QST de W1AW  
Propagation Forecast Bulletin 27  ARLP027
From Tad Cook, K7VVV
Seattle, WA  July 3, 2002
To all radio amateurs 

ARLP027 Propagation de K7VVV

This is a short bulletin this week because of the Independence Day
holiday.  On July 12 we will be back with the sunspot, solar flux
and A index data for two weeks.

Conditions remain quiet, with solar flux dipping below 140 and
sunspot numbers below 100 around June 27 and 28.  The outlook still
appears flat for the near term, with solar flux around 140-145 for
the foreseeable future.

Because June has ended, we may now look at some monthly and
quarterly averages.

The average daily sunspot numbers for the last six quarters, from
January 1, 2001 to June 30, 2002 were 147.3, 164.8, 170.4, 198.1,
178.3 and 165.3.  The average daily solar flux for the same quarters
was 164.4, 166.7, 175.5, 219.1, 203.9 and 156.4.  As you can see,
solar activity has declined this quarter.

The average daily sunspot number per month for January through June
was 189, 194.5, 153.1, 144.4, 204.1 and 146.  Average daily solar
flux values for the same months were 227.3, 205, 179.5, 141.1, 178.4
and 148.7.  While the trend is down, it looks like May wasn't a bad

KC0DXK wrote in to reminisce about 6 meter contacts in 1998, and
said he looks forward to the next high sunspot period.  When might
the next solar cycle peak be?  It is quite a ways off in the future.
Current projections (which you can see at ) show the minimum
between the cycles around the end of 2006.  The next peak is so far
off that it isn't shown in this table, but 11 years from Spring 2000
is 2011.  Quite some time from now.

Last week's bulletin mused about being a dot-com
instead of dot-gov, and AA7VL pointed out that the Spaceweather site
isn't really sponsored by NASA.  It takes lots of data from NASA,
but it is put together by Dr. Tony Phillips, and isn't actually a
government site.


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