The lights may be the most visible in Canada and Alaska, but states from Washington to New York may be in the viewline.
2024-09-13 258词 简单
The SWPC forecasted that the aurora on Friday night will have a Kp index of 4, meaning that the aurora will move further from the poles and become brighter. “If you are in the right place, these aurora can be quite pleasing to look at,” the center said on its website. The Kp index is a measure of geomagnetic activity—the stronger the activity, the brighter the aurora will be.
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