Home Page Science Frontiers
ONLINE

No. 119: Sep-Oct 1998

Issue Contents





Other pages


Other Interesting Sites


 


 


 


 


 


 


 


 


 

 

Waterfall Phenomena

Waterfalls are more than just cascades of disorganized water molecules. There must be some structure and regularities in these streams of crashing fluid because waterfalls generate remarkable acoustical and luminous phenomena.

First, we recall those curious pure acoustical tones that have recently been detected by seismic recorders in the ocean near French Polynesia. (SF#115) Geologist W.A. Charlie has associated these tones in the ocean with the strange but well-verified pure tones heard emanating from some waterfalls.

Charlie recalls that the famous European geologist A. Heim observed that 15 Alpine waterfalls all produced two nonharmonizing groups of pure acoustical notes. These, a Zurich musician likened to the major-C triad and F. (Heim published his observations in a paper entitled: "Tone der Wasserfalle." Verhandlung der Schweizeren Naturforschung Gesellschaft, 8:209, 1874)

In his letter to the magazine Earth (now defunct), Charlie wondered if the same resonant tonegenerating mechanism (rising clouds of bubbles) operated in both the oceans and waterfalls.

(Charlie, Wayne A.; "Musical Monotones," Earth, 7:7, June 1998.)

Comments. In our catalog Earthquakes, Tides (GQV2), we recorded how waterfalls produce low-frequency terrestrial vibrations with one frequency predominating. This characteristic frequency is inversely proportional to the height of the waterfall.

Just as fascinating are the remarkable flashes of light that emanate (rarely) from the bases of waterfalls. These may be due to sonoluminescence. (GLD14 in Lightning, Auroras)

Waterfall vibrations vs height
The predominant fequency in waterfall vibrations depends upon the height of the waterfall. (From: Earthquakes, Tides).

From Science Frontiers #119, SEP-OCT 1998. 1998-2000 William R. Corliss

Science Frontiers Sourcebook Project Reviewed in:

Quotes

  • "A sourcebook of unexplained phenomena is therefore a valuable addition to a collection of scientific literature. William R. Corliss has provided this in the past with his source books of scientific anomalies in several subjects, and now he has provided it for astronomy. He has done an excellent job of collecting and editing a large amount of material, taken in part from scientific journals and in part from scientific reporting in the popular or semi-scientific press." -- "The Mysterious Universe: A Handbook of Astronomical Anomalies", reviwed by Thomas Gold, Cornell University, in Icarus, vol.41, 1980

  • "An interesting, systematic presentation of unusual weather [..] This book is recommended for a general audience" --"Corliss, William R., Tornados, Dark Days, Anomalous Precipitation, and Related Weather Phenomena, Sourcebook Project, 1983.", revieweed in Choice, September 1983
  • "..the science is necessarily somewhat speculative, but Corliss's symthesis is based on reputable sources." -- "Corliss, William R. (Compiler). Lightning, Auroras, Nocturnal Lights, and Related Luminous Phenomena" reviwed by Joseph M. Moran, Univ. of Wisconsin in Science Books and Films, Sep/Oct 1983

  • "Before opening the book, I set certain standards that a volume which treads into dangerous grounds grounds like this must meet. The author scrupulously met, or even exceeded those standards. Each phenomenon is exhaustively documented, with references to scientific journals [..] and extensive quotations" -- "Book Review: The moon and planets: a catalog of astronomical anomalies", The Sourcebook Project, 1985., Corliss, W. R., Journal of the Royal Astronomical Society of Canada, Vol. 81, no. 1 (1987), p. 24., 02/1987