Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Posting-Version: version B 2.10.1 6/24/83; site mgweed.UUCP Path: utzoo!watmath!clyde!burl!mgnetp!mgweed!rjr From: rjr@mgweed.UUCP (Bob Roehrig) Newsgroups: net.ham-radio Subject: arrl propagation forecast bulletin nr 23 Message-ID: <9672@mgweed.UUCP> Date: Tue, 5-Jun-84 18:11:17 EDT Article-I.D.: mgweed.9672 Posted: Tue Jun 5 18:11:17 1984 Date-Received: Wed, 6-Jun-84 05:14:42 EDT Organization: AT&T Consumer Products - Montgomery Illinois Lines: 31 qst de k9eui hr propagation forecast bulletin nr 23 from arrl headquarters newington ct june 4, 1984 to all radio amateurs bt the solar flux average for may was 129.4, but flux values have been falling since may 21 and the reading for june 2 was 107. in late april we had readings as high as 183, a high for the past 17 months. such peaks have kept the daily average for 1984 at around 127. this is nearly two points above the early 1983 average, despite the fact that cycle 21 is now nearly eight years old. solar flux values during the past week, 120 to 107, are more like what is expected this late in the cycle, but flux levels are not a major propagation factor during the northern hemisphere summer. of more interest at this season is the activity of the earths magnetic field, which will be lower early in the forecast week, making for generally better conditions on all hf bands. it will rise again june 5 to 7, resulting in poorer high latitude propagation until about june 8. sporadic e layer ionization will continue to provide short skip on 28 and 50 mhz, and the chances for 144 mhz will improve. american sunspot numbers for may 24 through 30 were between 59 and 83 with a mean of 72.1 ar