A few students of mine have built an extreamly low frequency EM antenna
(under 100Hz) following directions in the Amateur Scientist section of
Scientific American (May 1996). (This was described as a project to detect
possible earthquake precursor signals which purportedly are in the 4Hz
range.) We are seeing all kinds of signals (but not at 4Hz!). We know what
the 60Hz signal is, we think we know that an 8Hz signal (and multiples) is
lightning. We also see signals occasionally (lasting several hours) at
65Hz, 75Hz and 80Hz. Can anyone point me to any information about naturally
occuring (or artificially occuring for that matter) low frequency signals?
I am in contact with an amateur group in CA who publish a newsletter but I
can find nothing from the professional world about this end of the
spectrum.
Thanks,
kyle
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
! kyle forinash 812-941-2390 !
! forinas@indiana.edu !
! Natural Science Division !
! Indiana University Southeast !
! New Albany, IN 47150 !
! http://Physics.ius.indiana.edu/Physics.html !
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