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Across
  1. 1. A region on the Sun's surface that appears dark and is cooler than the surrounding areas
  2. 3. Auroral research facility based in Alaska
  3. 5. A sudden explosion on the Sun's surface that releases a burst of energy and charged particles into space
  4. 6. The magnetic field surrounding the Earth that protects it from harmful solar radiation
  5. 9. A disturbance in the Earth's magnetic field caused by solar activity
  6. 10. A large explosion in the Sun's atmosphere that ejects clouds of electrons, ions, and atoms into space
Down
  1. 2. A period of high solar activity that occurs approximately every 11 years
  2. 4. The layer of the Sun's atmosphere where solar flares and coronal mass ejections originate
  3. 7. A stream of charged particles emitted from the Sun's upper atmosphere
  4. 8. The maximum number of sunspots observed on the Sun's surface during a solar cycle