Return-Path: Received: (qmail 27468 invoked from network); 9 Apr 2000 17:05:37 -0000 Received: from unknown (HELO post.thorcom.com) (212.172.148.70) by bells.core.plus.net.uk with SMTP; 9 Apr 2000 17:05:37 -0000 Received: from majordom by post.thorcom.com with local (Exim 3.02 #1) id 12eKzE-0007Nh-00 for rsgb_lf_group-outgoing@blacksheep.org; Sun, 09 Apr 2000 17:55:00 +0100 Received: from newmail.spectraweb.ch ([194.158.230.44]) by post.thorcom.com with esmtp (Exim 3.02 #1) id 12eKzB-0007Nc-00 for rsgb_lf_group@blacksheep.org; Sun, 09 Apr 2000 17:54:57 +0100 X-Priority: 3 X-MSMail-Priority: Normal Received: from freesurf.ch (194.230.192.32) by newmail.spectraweb.ch for ; 9 Apr 2000 18:54:43 +0200 Message-ID: <38F0B5FB.9971891F@freesurf.ch> X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 Date: Sun, 09 Apr 2000 18:55:23 +0200 From: "Toni" X-Mailer: Mozilla 4.6 [de] (Win98; I) X-Accept-Language: de,en-US,en-GB,fr-FR MIME-Version: 1.0 To: rsgb_lf_group@blacksheep.org Subject: LF: LF propagation and Kp index Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 8bit Precedence: bulk Reply-To: rsgb_lf_group@blacksheep.org X-Listname: rsgb_lf_group Sender: >From HB2ASB At different occasions I've made the following observations: It seems to me that there is a link between distortions in the magnetic field of the earth (caused by solar activity) and LF propagation. After a magnetic storm (not during) daylight propagation is often enhanced and night propagation disturbed and below average. I've also found a description of this phenomenon in old literature about LF propagation. At http://sec.noaa.gov/rt_plots/kp_3d.cgi you may observe the development of the Kp Index. 73 de Toni