Hi all, A speculative time period comparison to the solar flare geomagnetic disturbance "around" 09:30 on June 8, 2000 UTC, is on: http://www.geocities.com/meredithlamb/page054.html The SOHO satellite out in space, transmits passing fronts and it arrives on earth "around" a hour later. The diamagnetic horizontal seismometer here is orientated N-S, with a natural period of .9 seconds, but with a amplifier capacitiance period of some 30 seconds. The possible but speculation wave front seemed to have produced a main sine wave of 3 minutes, but with other sequence sine waves of more/less frequency. No natural or otherwise vehicle disturbance has been known to create this extended effect previously. Passing bus's are known to create a much shorter "spike", as on the far right of the 3 views shown. This instrument is unshielded and of course subject to seismic and other magnetic influence. Another geomagnetic front may pass on June 10th, but with a lesser amplitude. See Space Science News at: http://www.spaceweather.com Meredith Lamb __________________________________________________________ Public Seismic Network Mailing List (PSN-L)
Larry Cochrane <cochrane@..............>