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Celestial Weather & Influences
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Message: 1 Date: Thu, 14 Apr 2011 19:55:05 +1000 (EST) From: Regional Warning Centre < [email protected]> Subject: [ips-swp-alert] Solar Wind Geomagnetic Precursor Alert Message-ID: < [email protected]> Energetic Ion Enhancement Event 14 04 2011 0850 UT ACE EPAM 47-65keV Proton data flux exceeds 1.0e+04 p/cm2 Precursor to possible increased geomagnetic activity commencing over next 36 hours. Quoting: Anonymous Coward 1338197SUN-EARTH CONNECTION: Even a small solar flare can reach out and touch the Earth. On April 16th, sunspot 1190 produced a relatively minor C5-class flare. X-rays from the distant explosion broke apart molecules in Earth's upper atmosphere, creating a wave of ionization over Europe. Researcher Rob Stammes detected the sudden ionospheric disturbance or "SID" using a very low frequency radio receiver at the Polar Light Center in Lofoten, Norway: [ link to spaceweather.com] The wave of ionization allowed signals from a terrestrial radio station to bounce over the horizon into Stamme's 23.4 kHz VLF antenna. That's what's shown in the upper panel. Now consider the lower panel: "There was also a small increase in radio noise directly from the flare itself at 56.25 MHz," points out Stammes. "Contact with the sun at VLF and VHF radio frequencies at the same moment gives me important information."
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