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Active October Sun Releases X-Class Flare
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Brighter than a shimmering ghost, faster than the flick of a black cat’s tail, the Sun cast a spell in our direction, just in time for Halloween. This imagery captured by NASA’s Solar Dynamics Observatory covers a busy few days of activity between Oct. 25-28 that ended with a significant solar flare.
From late afternoon Oct. 25 through mid-morning Oct. 26, an active region on the left limb of the Sun flickered with a series of small flares and petal-like eruptions of solar material.
Meanwhile, the Sun was sporting more active regions at its lower center, directly facing Earth. On Oct. 28, the biggest of these released a significant flare, which peaked at 11:35 a.m. EDT.
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.
This flare was classified as an X1-class flare. 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, and so on. Flares that are classified X10 or stronger are considered unusually intense.
This was the second X-class flare of Solar Cycle 25, which began in Dec. 2019. A new solar cycle comes roughly every 11 years. Over the course of each cycle, the Sun transitions from relatively calm to active and stormy, and then quiet again; at its peak, known as solar maximum, the Sun’s magnetic poles flip.
Two other eruptions blew off the Sun from this active region: an eruption of solar material called a coronal mass ejection and an invisible swarm of solar energetic particles. These are high-energy charged particles accelerated by solar eruptions.
NASA’s fleet of heliophysics missions keep constant watch on the Sun and space to help us understand what causes such eruptions on the Sun, as well as how this activity affects space, including near Earth, where they can impact astronauts and satellites.
Music: "Immersion" from Above and Below. Written and produced by Lars Leonhard.
Video credit: NASA/GSFC/SDO
Scott Wiessinger (KBRwyle): Producer
Tom Bridgman (GST): Data Visualizer
Kathalina Tran (SGT): Science Writer
Follow NASA’s Goddard Space Flight Center
From late afternoon Oct. 25 through mid-morning Oct. 26, an active region on the left limb of the Sun flickered with a series of small flares and petal-like eruptions of solar material.
Meanwhile, the Sun was sporting more active regions at its lower center, directly facing Earth. On Oct. 28, the biggest of these released a significant flare, which peaked at 11:35 a.m. EDT.
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.
This flare was classified as an X1-class flare. 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, and so on. Flares that are classified X10 or stronger are considered unusually intense.
This was the second X-class flare of Solar Cycle 25, which began in Dec. 2019. A new solar cycle comes roughly every 11 years. Over the course of each cycle, the Sun transitions from relatively calm to active and stormy, and then quiet again; at its peak, known as solar maximum, the Sun’s magnetic poles flip.
Two other eruptions blew off the Sun from this active region: an eruption of solar material called a coronal mass ejection and an invisible swarm of solar energetic particles. These are high-energy charged particles accelerated by solar eruptions.
NASA’s fleet of heliophysics missions keep constant watch on the Sun and space to help us understand what causes such eruptions on the Sun, as well as how this activity affects space, including near Earth, where they can impact astronauts and satellites.
Music: "Immersion" from Above and Below. Written and produced by Lars Leonhard.
Video credit: NASA/GSFC/SDO
Scott Wiessinger (KBRwyle): Producer
Tom Bridgman (GST): Data Visualizer
Kathalina Tran (SGT): Science Writer
Follow NASA’s Goddard Space Flight Center
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