VLF2.ZIP GUIDE TO FILES CONTAINED IN THIS ZIP FILE: --------------------------------------------------- All Natural Radio recordings were recorded by Stephen P. McGreevy using the McGreevy WR-4B E-Field VLF receiver and 10' (3 meter) vertical antenna. Tape recorder used was a Marantz PMD 212. Files were converted to .WAV files using a SoundBlaster 16 card and Wave 'OLE or WaveEditor. The following files were recorded at 8 bit, 11 kHz sampling rate * . (The antenna and front- end circuit of the WR-4B whistler receiver was temporarily attached to my van via bungee cord) and the control box sits next to beds in back. * Unless otherwise indicated. 1) NEWH_HQ.WAV 04 June 1993, 60 miles NNE of Reno, NV, 1430 11 sec. UTC, 7:30 am PDT. Weak Dawn Chours (minor mag. storm in progress with weak background layer of sferics plus very strong sferics from lightning within 100 mi. of receiver. A strong, pure whistler of slow descending rate occurrs after one of these semi- local lightning sferics. This segment taped at 44 kHz sampling rate. 2) ORECHORS.WAV Loud Dawn Chorus and Hiss, recorded 18 Aug. 1993 in southeastern Oregon's Alvord Desert. 34 sec. 1430 UTC, 0730 PDT. Major magnetic storm in progress. Magnetic field "micro-pulsations" are very evident (slow undulations in the hiss/chorus every 3-4 sec similar to ocean waves. 3) PURENVWH.WAV 04 June 1993, 60 miles NNE of Reno, NV, 1430 19.5 sec. UTC, 7:30 am PDT. Weak Dawn Chours (minor mag. storm in progress with weak background layer of sferics plus very strong sferics from lightning within 100 mi. of receiver. A strong, pure whistler of slow descending rate occurrs after one of these semi- local lightning sferics. 4) PUREWHIS.WAV Actually, a duplicate recording as the one 19.5 sec. above but with a different filename! Natural Radio emissions such as these occur in the 0.1 to 11 kHz radio spectrum--essentially, they are audio-frequency radio waves! This is just a small variety of fascinating "sounds" to be received at these ELF/VLF frequencies. You must be located at least 1 to 2 miles from any power-lines so their "hum" is not received. This is why I like to listen in the NV high-desert and Great Basin Area--plenty of open spaces! A hand held version of the WR-4B is available for $105. Contact Steve McGreevy at: S.P. McGreevy Productions, 45 Elda Drive, San Rafael, CA 94903. E-mail: spmcgrvy@ix.netcom.com -- or -- s.mcgreevy@genie.geis.com