An acoustic source for infrasonic electromagnetic wave exploration
including: an electrically conductive, generally cylindrical tubular
member for containing an electrically conductive fluid, the tubular
member having a closed top end, an open bottom end, an interior wall and
an internal diameter; an electrode axially positioned within the tubular
member, wherein the electrode is axially positioned within the tubular
member at a distance equivalent to about three times the internal
diameter of the tubular member to enable the acoustic source to produce
high energy acoustic waves having a substantial portion of acoustic wave
energy in the infrasonic frequency range; means for electrically
connecting the electrode to the negative electrical pole of an external
source of DC electric power; and means for electrically connecting the
tubular member to one of: a positive electrical pole of the external
source of DC electric power; an electrical ground; and a combination of
the above.