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1. Topband: Solar Flux Question (score: 1): Author: Bill Stewart <cwopr@embarqmail.com>; Date: Fri, 6 Nov 2020 15:23:53 -0500 (EST); Per WWV, the solar flux is at 91. What, if any, affect does this have on propagation in HF or other frequency bands....and of course 160 meters. I have seen these geophysical numbers often, but never; /archives//html/Topband/2020-11/msg00017.html (7,081 bytes)
2. Re: Topband: Solar Flux Question (score: 1): Author: Artek Manuals <Manuals@ArtekManuals.com>; Date: Fri, 6 Nov 2020 15:55:23 -0500; Bill Last night ON 160 I worked 32 European and SA stations with the reported SFI of 88. earlier in the week with a similar SFI number I heard nothing from EU on 160. Conclusion : At these levels SF; /archives//html/Topband/2020-11/msg00018.html (7,945 bytes)
3. Re: Topband: Solar Flux Question (score: 1): Author: Bill Stewart <cwopr@embarqmail.com>; Date: Fri, 6 Nov 2020 16:38:54 -0500 (EST); Tnx Dave for the info. I have also noted nights with some strong EU stations and the next night nothing heard...SFI staying the same. To clarify, I run 100w and an inv. L and no special receive anten; /archives//html/Topband/2020-11/msg00021.html (9,684 bytes)
4. Re: Topband: Solar Flux Question (score: 1): Author: Henk Remijn PA5KT via Topband <topband@contesting.com>; Date: Fri, 6 Nov 2020 22:52:34 +0100; My experience is that 160 conditions are also influenced by the solar wind. https://solen.info/solar/indices.html. This graph shows SFI and solar wind. When solar winds are up to 300 km/s the conditi; /archives//html/Topband/2020-11/msg00022.html (9,927 bytes)
5. Re: Topband: Solar Flux Question (score: 1): Author: Henk Remijn PA5KT via Topband <topband@contesting.com>; Date: Fri, 6 Nov 2020 22:54:51 +0100; This one has a larger span and you can see the 27 day periods. https://www.solen.info/solar/images/swind.png 73 Henk Op 6-11-2020 om 22:52 schreef Henk Remijn PA5KT via Topband: My experience is that; /archives//html/Topband/2020-11/msg00023.html (10,634 bytes)
6. Re: Topband: Solar Flux Question (score: 1): Author: donovanf@erols.com; Date: Fri, 6 Nov 2020 17:58:29 -0500 (EST); Hello Henk, Most of the kinetic energy released from solar wind into the Earth's magnetosphere and then its ionosphere is in contained in the velocity of the solar wind. Much less energy is in the ex; /archives//html/Topband/2020-11/msg00028.html (11,439 bytes)
7. Re: Topband: Solar Flux Question (score: 1): Author: Arthur Delibert <radio75a3@msn.com>; Date: Sat, 7 Nov 2020 02:31:36 +0000; Thanks. Very helpful. One question: The attachment says: "The coloured dot within the black square, is an indicator of solar wind density, and is yellow when density exceeds 10 particles per cubic cm; /archives//html/Topband/2020-11/msg00029.html (13,284 bytes)
8. Re: Topband: Solar Flux Question (score: 1): Author: donovanf@erols.com; Date: Sat, 7 Nov 2020 00:26:57 -0500 (EST); Hi Bill, Both the solar flux index and the sunspot number are proxy measures of ionizing extreme ultraviolet radiation, the 10 nm wavelength of UV radiation that ionizes the E and F layers of the ion; /archives//html/Topband/2020-11/msg00032.html (9,288 bytes)
9. Re: Topband: Solar Flux Question (score: 1): Author: donovanf@erols.com; Date: Sat, 7 Nov 2020 01:17:55 -0500 (EST); Hi Arthur, Persistent high speed solar wind speed contains significantly more kinetic energy than transient high density solar wind. High density solar wind is a transient event of solar wind origin; /archives//html/Topband/2020-11/msg00034.html (14,626 bytes)
10. Re: Topband: Solar Flux Question (score: 1): Author: Bill Stewart <cwopr@embarqmail.com>; Date: Sun, 8 Nov 2020 06:07:17 -0500 (EST); Tnx all for the info on the SFI. All good explanations and I am in the process of reading your replies. 73 de Bill K4JYS _________________ Searchable Archives: http://www.contesting.com/_topband - To; /archives//html/Topband/2020-11/msg00043.html (7,578 bytes)

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