With little warning, an unexpected geomagnetic storm occurred on August 23rd 2017
With little warning, an unexpected geomagnetic storm occurred on Aug. 23rd, ringing Earth’s poles with the luminous glow of auroras. Peter Sayers photographed the display from the banks of the Forth River in Tasmania, Australia
“These fantastic auroras came out of left field while I was watching the southern horizon,” says Sayers. “There were beams like search lights for hours–a beautiful naked eye display.”
What happened? The interplanetary magnetic field (IMF) near Earth tipped south, opening a crack in our planet’s magnetosphere. Solar wind blew in through the opening and fueled the display.
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