A solar flare hit Earth this month

A mass of solar material that erupted from the Sun on October 9, 2021, reached Earth on October 12, evidence of the reactivation of the cycle of activity in our star.

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The Earth-directed Coronal Mass Ejection, or CME, raised the Kp index, a measure of disturbance in the Earth’s magnetic field,. The Kp index levels range from 0 (quiet) to 9 (strong).

The CME was associated with an M1.6-class solar flare from Active Region 2882 that peaked on October 9 at 6:38 UTC (1:38). M-class flares are one-tenth the size of the most intense, X-class flares. An M2 is twice as intense as an M1, an M3 is three times as intense, etc.

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As reported by NASA, the flare was also detected by the space agency’s Solar Terrestrial Relations Observatory-Ahead Observatory, or the STEREO-A spacecraft.

STEREO-A also detected the CME from its vantage point far from Earth. The initial velocity of the CME was estimated by NASA’s Moon-to-Mars Space Weather Operations Office at approximately

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Deshawn