Envelope-to: dave@picks.force9.co.uk Delivery-date: Sun, 12 Jun 2005 11:17:39 +0100 Received: by pih-mxcore11.plus.net with spam-scanned (PlusNet MXCore v2.00) id 1DhPX8-0001kg-Ce for dave@picks.force9.co.uk; Sun, 12 Jun 2005 11:17:39 +0100 Received: from post.thorcom.com ([193.82.116.20]) by pih-mxcore11.plus.net with esmtp (PlusNet MXCore v2.00) id 1DhPX8-0001kU-8W for dave@picks.force9.co.uk; Sun, 12 Jun 2005 11:17:38 +0100 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1DhPWO-0004wl-Sb for rs_out_1@blacksheep.org; Sun, 12 Jun 2005 11:16:52 +0100 Received: from [193.82.116.32] (helo=relay1.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1DhPWO-0004wc-6j for rsgb_lf_group@blacksheep.org; Sun, 12 Jun 2005 11:16:52 +0100 Received: from smtp807.mail.ukl.yahoo.com ([217.12.12.197]) by relay1.thorcom.net with smtp (Exim 4.51) id 1DhPcF-0006pi-2W for rsgb_lf_group@blacksheep.org; Sun, 12 Jun 2005 11:22:57 +0100 Received: (qmail 5076 invoked from network); 12 Jun 2005 10:16:44 -0000 Received: from unknown (HELO Main) (Alan.Melia@81.131.205.33 with login) by smtp807.mail.ukl.yahoo.com with SMTP; 12 Jun 2005 10:16:43 -0000 Message-ID: <000701c56f37$cd8ecf20$6507a8c0@Main> From: "Alan Melia" <Alan.Melia@btinternet.com> To: rsgb_lf_group@blacksheep.org References: <2b.75031415.2fdd4760@aol.com> Date: Sun, 12 Jun 2005 10:48:30 +0100 MIME-Version: 1.0 X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 5.50.4522.1200 X-MimeOLE: Produced By Microsoft MimeOLE V5.50.4522.1200 Subject: LF: Re: CFH (11/12 June) Content-Type: text/plain; charset=iso-8859-1; format=flowed Content-Transfer-Encoding: 8bit X-SA-Exim-Scanned: Yes Sender: owner-rsgb_lf_group@blacksheep.org Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group X-SA-Exim-Rcpt-To: rs_out_1@blacksheep.org X-SA-Exim-Scanned: No; SAEximRunCond expanded to false X-PN-SpamFiltered: by PlusNet MXCore (v2.00) Hi all yes Brian's plot shows a series of peaks from CFH. The reason it has not been visible recently is not I believe due to propagation but more due to inactivity. I also think the timing of the "blip" with a C3 flare is probably totally coincidental as the radiation from the flare would only affect the illuminated part of the ionosphere. Flare enhancement in daytime follows closely the profile of the flux plot. Whilst the path from CFH to Nurenberg passes quite a way further north than the path to Brian, it is mostly in darkness I believe at that time. The Dst index has been climbing for a few days now and has been well into positive values over the last 36 hours. This indicates to me that there are few "spare" electrons in the Equatorial Ring Current to be precipitated or exchanged with the ionosphere. These hot electrons are the ones that cause night-time absorption at LF ( and aurora), so night-times paths should be good at the moment. The only negative factor is the level of QRM from lightning storms at this time of year in the northern hemishere. Cheers de Alan G3NYK ----- Original Message ----- From: <MarkusVester@aol.com> To: <rsgb_lf_group@blacksheep.org> Sent: 12 June 2005 09:08 Subject: LF: CFH (11/12 June) > Dear LF Group, > > after several weeks of rather marginal levels, CFH showed a strong peak > between 02:00 and 03:00 last night (see capture). There were a couple of weak > dashes on 137778.75 at the time as well. Perhaps coincidentally, the solar x-ray > plot on http://www.sec.noaa.gov/today.html showed a prolonged period of > enhancement. > > On 100 kHz, I have looked out for the announced LORAN pulses from Rugby, but > nothing seen yet. > > 73 and all the best > > Markus, DF6NM > ---------------------------------------------------------------------------- ----