Last Updated
：2025/11/21
ionosphere
（ plural ）
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The part of the Earth's atmosphere beginning at an altitude of about 50 kilometers (31 miles) and extending outward 500 kilometers (310 miles) or more.
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ionosphere
Researchers monitored radio signal variations as solar flares disturbed the ionosphere.
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Researchers monitored radio signal variations as solar flares disturbed the ionosphere.
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