VLF2.ZIP GUIDE TO FILES CONTAINED IN THIS ZIP FILE:
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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