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• A Sferics Locating System has been developed to determine the geographical location of lightning strokes...
• ...an artificial sferics generator was used as a known source of EM pulses.
• Researchers have thought that possibly these sferics could be used to track hurricanes—but so far, they have been only marginally successful.
• Sferics are classified normally by the frequency of the receiver used to detect them.
• This circuit generates a bipolar pulse waveform that closely approximates the main features of sferics.
• The second common theoretical approach of the propagation of sferics involves viewing the Earth-ionosphere cavity as a waveguide...
• In the identification of sources of short whistlers, the spectral characteristics of the sferics can often be used to establish many sferics as doubtful...
• As it turned out, the whistler was only the first of a family of sferics whose taxonomy was to include clicks, hooks, risers, nose-whistlers and one like a warbling of birds called the dawn chorus....