Return-Path: Received: (qmail 81538 invoked from network); 5 Jan 2005 22:13:48 -0000 Received: from unknown (HELO ptb-spamcore01.plus.net) (192.168.71.1) by ptb-mailstore01.plus.net with SMTP; 5 Jan 2005 22:13:48 -0000 Received: from mailnull by ptb-spamcore01.plus.net with spamcore-l-b (Exim 4.32; FreeBSD) id 1CmJOg-000N4t-1X for dave@picks.force9.co.uk; Wed, 05 Jan 2005 22:12:54 +0000 Received: from [192.168.67.1] (helo=ptb-mxcore01.plus.net) by ptb-spamcore01.plus.net with esmtp (Exim 4.32; FreeBSD) id 1CmJOf-000N4l-Tc for dave@picks.force9.co.uk; Wed, 05 Jan 2005 22:12:53 +0000 Received: from post.thorcom.com ([193.82.116.20]) by ptb-mxcore01.plus.net with esmtp (Exim 4.30; FreeBSD) id 1CmJPX-000B5m-PD for dave@picks.force9.co.uk; Wed, 05 Jan 2005 22:13:47 +0000 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1CmJOs-0006fY-Ob for rs_out_1@blacksheep.org; Wed, 05 Jan 2005 22:13:06 +0000 Received: from [193.82.116.30] (helo=relay.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1CmJOs-0006fP-66 for rsgb_lf_group@blacksheep.org; Wed, 05 Jan 2005 22:13:06 +0000 Received: from smtp810.mail.ukl.yahoo.com ([217.12.12.200]) by relay.thorcom.net with smtp (Exim 4.41) id 1CmJOn-0002b8-KR for rsgb_lf_group@blacksheep.org; Wed, 05 Jan 2005 22:13:06 +0000 Received: from unknown (HELO Main) (Alan.Melia@81.131.27.70 with login) by smtp810.mail.ukl.yahoo.com with SMTP; 5 Jan 2005 22:12:55 -0000 Message-ID: <000101c4f373$a5ebd020$6507a8c0@Main> From: "Alan Melia" To: rsgb_lf_group@blacksheep.org References: <010520052158.117.41DC630500081A5A0000007522007374780B97010D0A020E06979D0E03@comcast.net> Date: Wed, 5 Jan 2005 22:11:29 -0000 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 X-SPF-Result: relay.thorcom.net: 217.12.12.200 is neither permitted nor denied by domain of btinternet.com X-Spam-Score: 0.0 (/) X-Spam-Report: autolearn=failed,none Subject: LF: Re: Gravity Waves Content-Type: text/plain; charset=Windows-1252; format=flowed Content-Transfer-Encoding: 8bit X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Status: No, hits=0.0 required=5.0 tests=none autolearn=no version=2.63 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-Spam-Filtered: by PlusNet SpamCORE (v3.00) Thanks Warren, I knew if I made outlandish enough suggestions someone would come up who knew the answer !! I wasn't sure of the definition but guessed at what you described. If there are gravity waves due to CME shocks, these should be detectable on a microbarograph ?? I keep wondering about playing in that area....trying to correlate the fading pattern with pressure changes......The problem could be the interaction is a "magnetic" collision and it wont correlate....but I wont know til I (or someone else ) try it. Cheers de Alan G3NYK ----- Original Message ----- From: "Warren K2ORS/WD2XGJ" To: Sent: 05 January 2005 21:58 Subject: LF: Gravity Waves > Alan, > The term "Gravity Waves" as used in geophysics (as opposed to astrophysics) refers to a wave at a density discontinuity whose restoring force is gravity. You are correct in making the analogy with waves on the ocean surface, ocean waves are a type of gravity wave. One can envison a similar phenomena wherever there is a pronounced disconinuity - such as at boundary between atmospheric or ionospheric layers (tropopause, stratopause, etc.) > In my mis-spent youth I did graduate studies in geophysics! > > -- > 73 Warren K2ORS/WD2XGJ > FN42hi