In Pictures: What’s up with these solar storms?

Solar storms are raging, how will the impact Earth?

In Pictures: What’s up with these solar storms? prev next

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The biggest solar flares are known as "X-class flares" based on a classification system that divides solar flares according to their strength. The smallest ones are A-class (near background levels), followed by B, C, M and X. Similar to the Richter scale for earthquakes, each letter represents a 10-fold increase in energy output. So an X is 10 times an M and 100 times a C. Within each letter class there is a finer scale from 1 to 9, NASA says.

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In Pictures: What’s up with these solar storms?

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