The Sun emitted a strong solar flare, peaking at 12:01 a.m. on Dec. 8, 2025. NASA’s Solar Dynamics Observatory, which watches the Sun constantly, captured an image of the event.
Solar flares are powerful bursts of
energy. Flares and solar eruptions can impact radio communications, electric
power grids, navigation signals, and pose risks to spacecraft and
astronauts.
This flare is classified as an X1.1
flare. X-class denotes the most intense flares, while the number provides more
information about its strength.
To see how such space weather may affect
Earth, please visit NOAA’s Space Weather Prediction Center https://spaceweather.gov/, the U.S. government’s official source for space weather forecasts,
watches, warnings, and alerts. NASA works as a research arm of the nation’s
space weather effort. NASA observes the Sun and our space environment
constantly with a fleet of spacecraft that study everything from the Sun’s
activity to the solar atmosphere, and to the particles and magnetic fields in
the space surrounding Earth.
NASA’s Solar Dynamics Observatory captured this image
of a solar flare — seen as the bright flash on the right — on Dec. 8, 2025. The
image shows a subset of extreme ultraviolet light that highlights the extremely
hot material in flares and which is colorized in teal.
Credit: NASA/SDO
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