SUDDEN IONOSPHERIC DISTURBANCE: Around 1320 UT, a wave of ionization swept through the high atmosphere over Europe after sunspot AR1389 unleashed another M2-class solar flare. “There was a very clear sudden ionospheric disturbance on my VLF radio instruments,” reports Rob Stammes, who sends these data from the Polar Light Center in Lofoten, Norway. NOAA forecasters estimate a 40% chance of more M-flares during the next 24 hours. There is also a 5% chance of X-flares. Solar winds from the coronal hole seen below should hit Earth on Jan

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