SOLAR WIND ALERT: NOAA forecasters estimate a 60% chance of minor G1-class geomagnetic storms on June 1st, increasing to 65% on June 2nd, when a stream of high-speed solar wind is expected to reach Earth. The last time this gaseous stream lashed our planet’s magnetic field, almost a month ago, it sparked bright ribbons of purple light (a.k.a. “STEVE”) seen from multiple US states. Visit today’s edition of Spaceweather.com for more information.

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Above: The gaseous material en route to Earth is flowing from an equatorial hole in the sun’s atmosphere, shown here in a false-color UV image from NASA’s Solar Dynamics Observatory.