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in #earthquake • 7 years ago (edited)

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The Sun is still at it! Our star released another mid-level flare on Sept. 8, clocking in at M8.1. This is the sixth sizable flare from the same active region (AR 2673) since Sept. 4, including:

  • M5.5 on Sept. 4
  • X2.2 on Sept. 6
  • X9.3 on Sept. 6 (this is the strongest flare recorded during the current solar cycle, which began in December 2008!)
  • M7.3 on Sept. 7
  • X1.3 on Sept. 7

X-class denotes the most intense flares, followed by M-class, while the smallest flares are labeled as A-class (near background levels) with two more levels in between. Similar to the Richter scale for earthquakes, each of the five levels of letters represents a 10-fold increase in energy output.

Check for updates here: https://go.nasa.gov/2gN4L26

#sun
7 years ago in #earthquake by
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