The pulses range from 0.25 to 20 seconds in duration. They are probably linked with very low frequency radio waves, down around 1 to 10 cycles per second. I actually don't know too much about them but do know that they can be duplicated in the laboratory. I also usually don't say too much about detection methods outside of my own circle of researchers. However, the pulses are probably responsible for what some people refer to as "Ear Tones," high or low frequency "ping" type sounds that can be heard before some earthquakes.

I have and will continue to recommend that an international network be developed for keeping track of and evaluating the "Ear Tones" that people around the world hear. And several years ago I myself had a Web site Perl language CGI program designed to collect that type of information. It ran unattended for about a year. So, this is possible. And it is not too difficult.