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 25 Message-ID: <10030@mgweed.UUCP> Date: Mon, 18-Jun-84 18:38:16 EDT Article-I.D.: mgweed.10030 Posted: Mon Jun 18 18:38:16 1984 Date-Received: Fri, 22-Jun-84 09:23:01 EDT Organization: AT&T Consumer Products - Montgomery Illinois Lines: 29 qst de k9eui hr propagation forecast bulletin nr 25 from arrl headquarters newington ct june 18, 1984 to all radio amateurs bt after several days of solar flux levels in the low 90s, solar activity began to rise on june 13. by the 15th, the flux was up to 114. the indications are for gradually lower readings during the forecast week and through the end of june. the level of geomagnetic activity is no (garbled copy here) in propagation factor at this season, especially in our northern states and adjacent areas. on this basis, fair to poor propagation is predicted through june 20, improving to fair to good through the 28th. the early part of the arrl fd weekend should have good summer conditions on our lower frequencies in areas not plagued by thunderstorms. the usefulness of ??? 28 and 50 mhz will depend to a large extent on sporadic e layer ionization which peaks in late june. short skip, often with high signal levels, can break out suddenly, so field day teams keep continuous watches on these bands, especially 28 and 50 mhz. e skip is most common in late morning and early evening hours, local time, but it can show up at any hour. stable, calm weather makes for above average signal levels and extended range on 50 mhz and higher frequencies. american sunspot numbers for june 7 through 13 were between 22 and 45 with a mean of 30.9 ar