[SIO GP Seminars] Correction: Seminar: David J Thomson Wednesday April 11, 2:00PM

[Lindsay Smith]

The seminar is tomorrow, my apologies for the mistake.
> Please join us for a special seminar:
>
> Wednesday April 10, 2:00PM
> Munk Conference Room
>
> David J. Thomson
> Queen's University at Kingston, Canada
> SOLAR MODAL STRUCTURE of the ENGINEERING ENVIRONMENT
>
> Abstract:
> This presentation describes some unanticipated effects of the normal
> modes of the Sun on engineering and scientific systems. We begin  
> with  historical,
> scientific, and statistical background, then present evidence
> for the effects of solar modes on various systems. Engineering
> evidence for these modes was first noticed in an investigation
> of communications satellite failures and second in a study of
> excessive dropped calls in cellular phone systems.
>
> In our attempt to understand this unexpected source of problems,
> we have found that solar modes are detectable in the interplanetary
> magnetic fields and energetic particles at the Ulysses spacecraft,
> five astronomical units from the Earth. These modes couple into
> the magnetosphere, the ionosphere,  the geomagnetic field,
> and atmospheric pressure. Estimates of the power spectrum of
> data from solar radio telescopes and induced voltages on
> ocean cables show what appear to be solar modes at both lower
> and higher frequencies than the optically measured solar p-modes.
>
>
>
>
> Lindsay Smith
> Graduate Student, Geophysics
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