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NASA sees sun emit a mid-level flare

Date:
November 13, 2012
Source:
NASA/Goddard Space Flight Center
Summary:
On Nov. 13, 2012, the sun emitted a mid-level solar flare, peaking at 9:04 pm EST. This flare is classified as an M6 flare. M-class flares are the weakest flares that can still cause some space weather effects near Earth. They can cause brief radio blackouts at the poles. This M-class flare caused a radio blackout categorized according to the National Oceanic and Atmospheric Association's Space Weather Scales as R2 -- or "moderate" -- on a scale of R1 to R5. It has since subsided.
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FULL STORY

On Nov. 13, 2012, the sun emitted a mid-level solar flare, peaking at 9:04 p.m. EST.

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 Global Positioning System (GPS) and communications signals travel. This disrupts the radio signals for as long as the flare is ongoing, anywhere from minutes to hours.

This flare is classified as an M6 flare. M-class flares are the weakest flares that can still cause some space weather effects near Earth. They can cause brief radio blackouts at the poles. This M-class flare caused a radio blackout categorized according to the National Oceanic and Atmospheric Association's Space Weather Scales as R2 -- or "moderate" -- on a scale of R1 to R5. It has since subsided.

Increased numbers of flares are quite common at the moment, since the sun's normal 11-year activity cycle is ramping up toward solar maximum, which is expected in 2013. Humans have tracked this solar cycle continuously since it was discovered in 1843, and it is normal for there to be many flares a day during the sun's peak activity.

The flare was not associated with a coronal mass ejection (CME), another solar phenomenon that can send solar particles into space and can reach Earth one to three days later.


Story Source:

Materials provided by NASA/Goddard Space Flight Center. Note: Content may be edited for style and length.


Cite This Page:

NASA/Goddard Space Flight Center. "NASA sees sun emit a mid-level flare." ScienceDaily. ScienceDaily, 13 November 2012. <www.sciencedaily.com/releases/2012/11/121113151258.htm>.
NASA/Goddard Space Flight Center. (2012, November 13). NASA sees sun emit a mid-level flare. ScienceDaily. Retrieved July 23, 2024 from www.sciencedaily.com/releases/2012/11/121113151258.htm
NASA/Goddard Space Flight Center. "NASA sees sun emit a mid-level flare." ScienceDaily. www.sciencedaily.com/releases/2012/11/121113151258.htm (accessed July 23, 2024).

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