A partial lunar eclipse will take place on August 27 and 28, when the full moon will pass through part of Earth’s shadow, causing much of its surface to glow a deep red. This phenomenon, known as a "blood moon" when the moon is fully in shadow, will not reach that stage this time. However, it will be the deepest lunar eclipse worldwide until the next total lunar eclipse in December 2028. The event will be visible across North and South America, beginning at 9:23 p.m. Eastern Daylight Time on August 27 and lasting until around 3 a.m. on August 28, with the most dramatic view just after midnight. In Europe, the eclipse will occur near dawn as the moon sets below the horizon. In addition to the lunar eclipse, a moderate geomagnetic storm is expected, which could lead to the visibility of the aurora borealis, or northern lights, in several northern U.S. states and parts of Canada. The National Oceanic and Atmospheric Administration (NOAA) has issued a warning for a moderate (G2) geomagnetic storm on August 27, just before the eclipse begins. This storm, caused by solar activity, could make the auroras more visible, with the best chances of seeing both the eclipse and the aurora together in Canada and Alaska. Skywatchers in states from New York to Idaho may also see the aurora, though it is more likely to be faint or limited in scope compared to what is seen in higher latitudes. The aurora borealis occurs when charged particles from the sun, carried by the solar wind, interact with Earth's magnetic field and atmosphere, creating colorful lights in the sky. This activity was preceded by a powerful M-class solar flare from a sunspot called 4513 on August 25, which was followed by a coronal mass ejection. This ejection, expected to reach Earth between August 27 and 28, is likely to cause the geomagnetic storms that could enhance aurora visibility. The red color of the moon during the eclipse is a result of sunlight passing through Earth’s atmosphere. As sunlight travels through the atmosphere, shorter wavelengths like blue are scattered away, while longer wavelengths like red are bent toward the moon. This effect, known as Rayleigh scattering, gives the moon its reddish hue during a partial or total lunar eclipse. The European Space Agency explains that this phenomenon is similar to how sunsets appear red, and it will make the moon appear as a glowing red disk during the eclipse.