ARCTIC #AURORAS: Around the Arctic Circle, many #aurora tour guides have already packed their cameras for the end of the season. Marianne Bergli of Tromsø, Norway, is glad she waited one more night. "Auroras filled the sky on April 4th," she reports. "It was a fantastic end to our touring season."

A #solar #wind stream brushed Earth's magnetic field on April 4th. It did not cause a global geomagnetic storm; the planetary K-index peaked at 4. Nevertheless, the Arctic light show was sublime.

Soon, summer sunlight will make these displays impossible to see inside the Arctic Circle. That's why Bergli and others are going on vacation. "We start again in September," she says
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