Auroral oval

Auroral oval bestemmer rækkevidden af polarlyset. Det er et bælte omkring jordens magnetiske poler. Dens bredde varierer afhængigt af det såkaldte rumvejr – i perioder med lav solaktivitet bliver den smal, og den ekspanderer, når der er en stigning i udledningen af solvindpartikler.

Den aktuelle tilstand af Auroral oval i den nordlige og sydlige halvkugle kan ses i OVATION Auroral Forecast-sektionen på hjemmesiden www.spaceweatherlive.com.

Foto: Polarlys på den sydlige halvkugle, kilde: https://www.spaceweatherlive.com/en/auroral-activity/auroral-oval.

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