Did you know? Here’s a space weather and radio...

Did you know? Here’s a space weather and radio propagation educational tidbit – from http://SunSpotWatch.com – at 14:00 UTC on 2017-07-01:

PCA events can significantly impact transpolar and even some transauroral circuits. A PCA follows a diurnal pattern. Polar cap absorption is strongest during the day and weakest at night. PCA is not related to auroral activity or geomagnetic storming. Flares causing PCA may also produce a CME, though.

Remember, a PCA energetic protons can arrive within hours, while a CME takes days to arrive to Earth. X-ray flare radio and light energy (radiation, EUV, etc.) arrives in about eight minutes (at the speed of light).

Don’t forget to visit our live space weather and radio propagation web site, at: http://SunSpotWatch.com

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