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Magnetic fields snaking around the sun's southeastern limb are crackling with C- and M-class solar flares. Extreme UV pulses from the flares are illuminating Earth's upper atmosphere, causing waves of ionization to ripple around the dayside of our planet. Rob Stammes detected the sudden ionospheric disturbances (SIDs) from his laboratory in Lofoton, Norway:
"The extra ionization altered the propagation of very low frequency radio signals around Northern Europe," explains Stammes. "I detected these changes using my 60 kHz SID receiver."
More ionization waves are in the offing. NOAA forecasters estimate a 40% chance of M-class solar flares during the next 24 hours.
Neil Armstrong remembered.
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