Return-Path: Received: from rly-md06.mx.aol.com (rly-md06.mail.aol.com [172.20.29.144]) by air-md05.mail.aol.com (v120.9) with ESMTP id MAILINMD051-90b4733778738e; Thu, 08 Nov 2007 15:55:03 -0400 Received: from post.thorcom.com (post.thorcom.com [193.82.116.20]) by rly-md06.mx.aol.com (v120.9) with ESMTP id MAILRELAYINMD063-90b4733778738e; Thu, 08 Nov 2007 15:54:38 -0400 Received: from majordom by post.thorcom.com with local (Exim 4.14) id 1IqELq-0003YV-1k for rs_out_1@blacksheep.org; Thu, 08 Nov 2007 20:51:46 +0000 Received: from [83.244.159.144] (helo=relay3.thorcom.net) by post.thorcom.com with esmtp (Exim 4.14) id 1IqELo-0003YM-4Q for rsgb_lf_group@blacksheep.org; Thu, 08 Nov 2007 20:51:44 +0000 Received: from rwcrmhc14.comcast.net ([216.148.227.154]) by relay3.thorcom.net with esmtp (Exim 4.63) (envelope-from ) id 1IqELj-0005Z2-AI for rsgb_lf_group@blacksheep.org; Thu, 08 Nov 2007 20:51:42 +0000 Received: from rmailcenter75.comcast.net ([204.127.197.157]) by comcast.net (rwcrmhc14) with SMTP id <20071108205119m14004khl3e>; Thu, 8 Nov 2007 20:51:30 +0000 Received: from [24.91.18.115] by rmailcenter75.comcast.net; Thu, 08 Nov 2007 20:51:18 +0000 From: k2ors@comcast.net To: rsgb_lf_group@blacksheep.org, rsgb_lf_group@blacksheep.org Cc: "Andy Talbot" Date: Thu, 08 Nov 2007 20:51:18 +0000 Message-Id: <110820072051.13860.473376C6000538830000362422064246130B97010D0A020E06979D0E03@comcast.net> X-Mailer: AT&T Message Center Version 1 (Oct 30 2007) X-Authenticated-Sender: bWFyeWphbmVib3lkQGNvbWNhc3QubmV0 X-Spam-Score: 0.6 (/) X-Spam-Report: autolearn=disabled,NO_REAL_NAME=0.55 Subject: Re: LF: ULF / ELF monitoring station in Italy X-Spam-Checker-Version: SpamAssassin 2.63 (2004-01-11) on post.thorcom.com X-Spam-Level: X-Spam-Status: No, hits=0.3 required=5.0 tests=NO_REAL_NAME 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-AOL-IP: 193.82.116.20 X-AOL-SCOLL-AUTHENTICATION: listenair ; SPF_helo : X-AOL-SCOLL-AUTHENTICATION: listenair ; SPF_822_from : Content-Type: text/plain; charset="ISO-8859-1" Content-Transfer-Encoding: 7bit MIME-Version: 1.0 Andy, There's info on submarine transmissions on the vlf.it web site: http://www.vlf.it/submarine/sbmarine.html The U.S. closed down its ELF facility in Clam Lake Wisconsin in 2004. It's interesting to note that it took 3 Megawatts to achieve an ERP of 8 watts! Good write up at: http://enterprise.spawar.navy.mil/UploadedFiles/fs_clam_lake_elf2003.pdf -- 73 Warren K2ORS WD2XGJ 136-140kHz WD2XSH/23 505-510kHz WE2XEB/2 160-189kHz WE2XGR/1 505-515kHz FN42hi http://www.w4dex.com/wd2xgj.htm -------------- Original message ---------------------- From: "Andy Talbot" > Fascinating - just had to go and look-up Schumann resonances in Wikipedia. > The article there says that the waveguide has a harmonic response at > 59.4Hz, and gets excited by the US power grid. In which case I would > have thought it ought to be visible, but there is nothing on the > trace. > > Also, what looks like data at 80Hz - could that be a ULF submarine > transmission? Those have been observed, and there used to be a website > somwhere that showed slow FSK in the ULF region, believed to be from > a Russian transmitter. > > Andy G4JNT > > > > On 08/11/2007, Wolfgang Büscher wrote: > > Greetings all, > > > > Not LF or MF, but this may be interesting for some group members: > > Renato (IK1QFK) has set up a new automated ULF / ELF monitoring station : > > > > http://www.vlf.it/livedata.html > > > > It measures seismic (mechanical) events, the E-field, and the H-field > > (the latter with radio direction finding). > > It's amazing how clear the first few Schumann resonances can be seen in > > the E-field spectrogram. > > > > Cheers, > > Wolf DL4YHF . > > > > > > >