A huge Sunspot is rapidly increasing and has quadrupled in size since Tuesday with two primary dark cores twice the size of Earth as it turns to face our planet! It's just a week today since Sunspot 3514 produced a massive X2.8-class solar, the biggest since 2017!

Credit SDO/HMI.

A huge Sunspot is rapidly increasing as it turns to face Earth! Sunspot AR3529 is still growing, quadrupling in size since Tuesday, according to Spaceweather.com. This 48-hour movie from NASA's Solar Dynamics Observatory shows its rapid development: With two primary dark cores twice the size of Earth, AR3529 is an easy target for solar-filtered telescopes. Of greater interest is the sunspot's 'delta-class' magnetic field. Within the sunspot + and - magnetic polarities are pressing together. Magnetic reconnection could produce an X-class solar flare. Any eruptions today will be Earth-directed, as the sunspot almost directly faces Earth.

At the moment NASA is predicting a tiny 05% chance of a dangerous X-class flare, however, during the night the NOAA Spaceweather Prediction Centre recorded a strong M4.2 class flare from departing Sunspot 3519.

It's just a week today since Sunspot 3514 produced a massive X2.8-class solar flare which is the strongest flare of Solar Cycle 25 and the most powerful eruption the sun has produced since the great storms of Sept. 2017, see pictures below.

Credit SDO/HMI

The massive Sunspot, number AR 3514 fired the strongest solar flare of solar cycle 25. Sunspot 3514 erupted on Dec. 14th (1702 UT), producing a strong X2.8-class solar flare. This is the strongest flare of Solar Cycle 25 (so far) and the most powerful eruption the sun has produced since the great storms of Sept. 2017.  NASA's Solar Dynamics Observatory recorded the extreme ultraviolet flash:

Above, the NOAA Space Prediction Centre shows the X-class flare on the Goes satellite X-Ray Flux. The graph also shows two earlier powerful M-class flares.

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