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AURORAL CHORUS III -
now on single MP3 CD compilation of three albums!

Solar-Max. expeditions to:
Alberta August 2000
Saskatchewan/Alberta June/July 2001

Solar-Maximum period auroral-zone expedition CD notes: 'Auroral Chorus III' has been released as a huge MP3 data CD: in an MP3 format on a single CD along with lots of image files of aurora and wilderness photos - deserts to Mountains to the Boreal Forests. Six hours of audio also includes tracks from my original 'Auroral Chorus - I' album released only to WR-3 buyers previously. S. McGreevy 25 August 2003

Segments from Disc One:

Tracks 1 to 16 recorded at the Whitemud River VLF recording site in northern Alberta, Canada, 08 to 13 Aug. 2000 (56° 36.6' N latitude / 118° 17.3 W longitude). These 16 stereo tracks are best enjoyed either with headphones on low to medium volume or while sitting between a quality pair of speakers. Subtract 6 hours from UT for local Alberta time (MDT). Track durations are in parenthesis.

Alberta August 2000 Solar-Max. Expediton - Redux


Right channel: antenna loop oriented for maximum sensitivity to west/east. Left channel: antenna loop oriented for maximum sensitivity north/south.

Disc One Track #

1) A spectacular introduction to CD One, this recording - the first one I posted on the Internet of this expedition - is repeated for a longer duration in track 3. This recording and the longer version on track 3 is of a wild barrage of a what are called "hooks" - emissions that rise and then fall in pitch. In my 1996 album "Electric Enigma" I coined the term "crazy whistlers" for this phenomena. At the ends of this track, the hooks are so numerous and dense as to create a truly weird sound. Recorded on 13 Aug. 2000 at approximately 2050 UT (1:22) ALTA. - 1_hooks.mp3 - 645 KB

3) Longer duration recording of spectacular "hooks" occurring at an extremely rapid rate by 2 minutes into the recording on this track. A major magnetic storm was occurring at this time. Recorded 13 Aug. 2000 at 2050 UT / 1450 MDT (4:05) - - ALTA: - 69_ab2k.mp3 - 1.9 MB

7) Lower-pitched chorus and a few whistlers consisting mainly of riser clusters taped on 08 Aug. 2000 at 2245 UT. Notice the lightning static "pop" at 2 minutes 22 seconds into the track that stimulate a hissy whistler along with a burst of risers. Similar activity as heard August 1996 in Manitoba. (3:37) ); ALTA - 26c_ab2k.mp3 - 1.6 MB

9) Mid-morning chorus recorded 10 Aug. 2000 at 1940 UT. Very few local lightning storms in the vicinity at this time - lightning static is weaker and less dense. (0:57) - ALTA - 38c_ab2k.mp3 - 450k

16) A mono (audio from left-channel loop only) recording of hooks and risers track recorded an hour after track 15 above. 13 Aug. 2000 at 2200 UT (3:47) - ALTA - 77c_ab2k.mp3 - 1.7 MB

The next three mono tracks (from California and Colorado) on Disc One are natural VLF radio events recorded during the severe magnetic storm of 30 - 31 March 2001:

17) Moderately strong "growly" whistlers of moderate diffusion and weak background hiss and hissy whistlers (a whistler storm, albeit weak!) recorded 31 March 2001 at 0855 UT during a visible auroral display. Recorded in Inyo County Calif. (Santa Rosa Flat) near Death Valley National Park. -Mono - (2:11) CALIF.: - 31m0855z.mp3 - 1.5 MB

Aurora the morning of 31 March 2001 as seen from Inyo County, Calif.

Recordings from Nevada:

20) On a trip to Zion and Grand Canyon Nat. Parks, I recorded a compilation of pure-tone whistlers in central Nevada not far from Rachel, NV and the famed U. S. military's "Area 51" on the morning of 17 September 1999, beginning about 1200 UT / 0500 MDT (3:18) - Nevada - nv91799a.wav - 2.3 MB

Northwestern Nevada: Tracks 21 - 24: All mono. Late April 1996, despite being near solar-minimum, was a very active period on the sun, spawning a couple of large magnetic storms. Faint aurora was visible from my recording location at Nightengale, Nevada 60 miles northeast of Reno:

21) Whistlers and weak chorus recorded on 19 April 1996 around sunrise - a great solar-minimum VLF event. North-western, Nevada (0:20) - Nevada: - nv496b.mp3 - 298 KB

Download Adobe-Acrobat PDF-file of Auroral Chorus III CD booklet (3.2 MB) with full details of the two expeditions and audio tracks.

AURORAL CHORUS III, Disc Two:

Mono and stereo tracks 2 to 8 recorded in central/northern Saskatchewan, Canada 23 to 30 June 2001 at the stereo VLF recording expedition site in the Hanson Lake Game Preserve (54.4° N latitude/ 104.5° W longitude)

Right channel:(red) loop oriented for maximum sensitivity to northwest/southeast. Left channel:(black) loop oriented for maximum sensitivity northeast/southwest.

Disc Two - Track #:

2) Mesmerizing nighttime recording of slow-risers echoing in whistler-mode, along with "tweeking" lightning static - 23 June at 0955 UT (4:46) SASK.: - d04t01sk.mp3 - 4.47 MB

7) A half-hour after the recording in track 6 was made, the wavering tones are stronger - most noticeably in the left channel. Recorded on 29 June at 1644 UT (4:07) - SASK - d08t03sk.mp3 - 3.9 MB

8) High-pitched pure-tone hooks and background chorus. Recorded 30 June 01 at 1536 UT (5:58) SASK.: d09t01sk.mp3 - 5.6 MB

11) Strong dawn chorus and an occasional pure-tone whistler. Recorded on 08 July at 1302 UT. Waterton Lakes Park/Belly River. Same receiving set-up as tracks 10 and 11 (mono - 2:55) - ALTA - d09t31ab.mp3 - 2.7 MB

Download Adobe-Acrobat PDF-file of Auroral Chorus III CD booklet (3.2 MB) with full details of the two expeditions.

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