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NASA’s Solar Dynamics Observatory sees Giant Sunspot erupting more Solar Flares from the Sun

 

Written by Karen C. Fox
NASA’s Goddard Space Flight Center

NASA - National Aeronautics and Space AdministrationGreenbelt, MD – The sun emitted a mid-level solar flare, an M6.6-class, peaking at 11:32pm EDT on October 28th, 2014 – the latest in a series of substantial flares from a giant active region on the sun that first erupted with a significant solar flare on October 19th.

NASA’s Solar Dynamics Observatory, which constantly observes the sun, captured images of the event.

To see how this event may affect Earth, please visit NOAA’s Space Weather Prediction Center at http://spaceweather.gov , the U.S. government’s official source for space weather forecasts, alerts, watches and warnings.

A large active region erupts with a mid-level flare, an M6.6-class, in this image from NASA's SDO on the night of Oct. 27, 2014. The region will soon rotate over the right horizon of the sun and will no longer be facing Earth. (NASA/SDO)

A large active region erupts with a mid-level flare, an M6.6-class, in this image from NASA’s SDO on the night of Oct. 27, 2014. The region will soon rotate over the right horizon of the sun and will no longer be facing Earth. (NASA/SDO)

A large active region on the sun erupted with another X-class flare, an X2.0, on October 27th, 2014 — its fourth since October 24th. The flare peaked at 10:47am EDT.

X-class denotes the most intense flares, while the number provides more information about its strength. An X2 is twice as intense as an X1, an X3 is three times as intense, etc.

To see how this event may affect Earth, please visit NOAA’s Space Weather Prediction Center at http://spaceweather.gov , the U.S. government’s official source for space weather forecasts, alerts, watches and warnings.

Continuing a week’s worth of substantial flares beginning on October 19th, 2014, the sun emitted two mid-level solar flares on October 26th and October 27th. The first peaked at 8:34pm EDT on October 26th, 2014, and the second peaked almost 10 hours later at 6:09am EDT on October 27th. NASA’s Solar Dynamics Observatory, which constantly observes the sun, captured images of both flares.

Solar flares are powerful bursts of radiation. Harmful radiation from a flare cannot pass through Earth’s atmosphere to physically affect humans on the ground, however — when intense enough — they can disturb the atmosphere in the layer where GPS and communications signals travel.

To see how this event may affect Earth, please visit NOAA’s Space Weather Prediction Center at http://spaceweather.gov , the U.S. government’s official source for space weather forecasts, alerts, watches and warnings.

The first flare was classified as an M7.1-class flare. The second flare was a bit weaker, classified as an M6.7-class.

M-class flares are one tenth as strong as X-class flares, which are the most intense flares. The number provides more information about its strength. An M2 is twice as intense as an M1, an M3 is three times as intense, etc.

The series of flares over the course of the previous week all erupted from a particularly large active region on the sun, labeled AR 12192 – the largest seen on the sun in 24 years. Active regions are areas of intense and complex magnetic fields that are often the source of solar flares.

Active regions are more common at the moment as we are in what’s called solar maximum, which is the peak of the sun’s activity, occurring approximately every 11 years.

What is a solar flare?

For answers to this and other space weather questions, please visit the Spaceweather Frequently Asked Questions page.

Related Links

› Download high resolution media from all flares from AR2192
› What does it take to be X-class?
› View Past Solar Activity


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