Question
Which of the following indicates the greatest solar flare intensity?
Answer Options
- A) Class A
- B) Class Z
- C) Class M
- D) Class X
Correct Answer: D
Explanation
Solar flares are massive, explosive releases of energy from the Sun that primarily emit X-rays and UV radiation. The flares are classified by their peak X-ray flux measured near Earth, which is a key indicator of their potential to cause a short-term radio blackout on the sunlit side of the planet.
Solar flare intensity is classified using a letter code system: A, B, C, M, and X, with X being the most intense. Therefore, Class X indicates the greatest solar flare intensity. X-class flares are major events that often cause severe HF radio blackouts and significant short-term D-layer absorption.
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