NASA’s Solar Dynamics Observatory captured this image of a solar flare — seen as the bright flash toward the upper middle — on Feb. 4, 2026. The image shows a subset of extreme ultraviolet light that highlights the extremely hot material in flares and which is colorized in blue and red.
NASA/SDO
This Feb. 4, 2026, image from NASA’s Solar Dynamics Observatory (SDO) captures a strong solar flare erupting from the star. Solar flares are powerful bursts of energy that can, along with other types of solar eruptions, can impact radio communications, electric power grids, navigation signals, and pose risks to spacecraft and astronauts. The flare pictured was classified as an X4.2 flare. X-class denotes the most intense flares, while the number provides more information about its strength.
SDO measures the Sun’s properties and solar activity to help us better understand the Sun’s magnetic changes. By studying flares and how they affect our planet and nearby space, SDO helps us to better prepare for and deal with these potential disruptions.
Image credit: NASA/SDO
NASA太阳动力学天文台捕捉到了这张太阳耀斑图像——即图中中上部那道明亮的闪光，拍摄于2026年2月4日。该图像展示了极紫外光波段下的景象，凸显了耀斑中极热的物质，并经过了蓝色和红色的伪彩色处理。
NASA/SDO
这张由NASA太阳动力学天文台（SDO）拍摄于2026年2月4日的图像，捕捉到了太阳爆发的一次强烈耀斑。太阳耀斑是剧烈的能量爆发，它与其他类型的太阳爆发活动一样，可能会影响无线电通信、电网及导航信号，并对航天器和宇航员构成威胁。图中显示的耀斑被归类为X4.2级。X级代表强度最高的耀斑，而随后的数字则提供了关于其强度的具体信息。
SDO通过测量太阳的特性与活动，帮助我们更好地理解太阳磁场的变化。通过研究耀斑及其对地球和近地空间的影响，SDO帮助我们更好地准备和应对这些潜在的干扰。
图片来源: NASA/SDO
