Earth is inside a stream of solar wind flowing from a hole in the sun's atmosphere. First contact with the gaseous material on May 29th produced an outburst of colorful auroras over Canada. Harlan Thomas photographed the display northwest of Calgary:

Rainbow auroras NW of Calgary
© Harlan Thomas
"The outburst was filled with amazing hues from blue to pink," says Thomas. "The aurora danced the dance of colors that only it can produce."
Rainbow auroras NW of Calgary
© Harlan Thomas
NOAA forecasters expect solar wind effects to continue for another 24 to 48 hours. Full-fledged geomagnetic storms are unlikely, but intermittent auroras may be seen in northern places where the waxing midnight sun has not yet wiped out the night sky.