A Sunday solar flare means auroras could be visible in parts of the U.S. and Canada on Wednesday, weather officials said.
The National Oceanic and Atmospheric Administration Space Weather Prediction Center raised geomagnetic storm watches for Wednesday and Thursday. The solar flare was associated with a partial coronal mass ejection, which is a large expulsion of plasma and magnetic field lines from the Sun's corona — the outermost part of its atmosphere. If the CME arrives as anticipated, G2, or moderate, storm conditions are expected Wednesday with G1, or minor, conditions Thursday.
Astronomy fans could start seeing the northern lights more often than usual going forward, NOAA space scientist Rob Steenburgh said in April. Sun activity is expected to steadily increase, which means more opportunities to see the aurora. A new solar cycle began late in 2019, according to NASA. New cycles happen about every 11 years when the Sun flips its magnetic poles. The current cycle, Solar Cycle 25, is expected to be most active in mid-2024.
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