giovedì 6 luglio 2017

NEW SUNSPOT: Breaking a string of two spotless days, new sunspot AR2665 is emerging over the sun's eastern limb. It's a big sunspot, with a primary dark core twice as wide as Earth. The magnetic canopy of AR2665 is crackling with minor B-class solar flares, but so far nothing stronger. This is probably a mostly-quiet sunspot typical of the decaying solar cycle. Free: Solar Flare Alerts
CORONAL HOLE FACES EARTH: A hole in the sun's atmosphere has opened up and it is spewing solar wind into space. NASA's Solar Dynamics Observatory is monitoring the structure as it turns to face Earth:
This is a coronal hole (CH)--a region in the sun's atmosphere where the magnetic field peels back and allows solar wind to escape. Solar wind flowing from this hole should reach our planet on July 8th or 9th and could spark a minor G1-class geomagnetic storm. Unfortunately, bright moonlight will interfere with the visibility of auroras, which might otherwise be seen at high latitudes. Free: Aurora Alerts

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