An active region is an area on the Sun's surface marked by strong magnetic fields, often associated with sunspots and solar flares. These regions are indicators of intense solar activity and can influence space weather.
sunspot: A cooler, dark spot on the Sunโs surface associated with intense magnetic activity.
solar flare: A sudden eruption of energy on the Sun's surface caused by changes in its magnetic field.
coronal mass ejection (CME): A massive burst of solar wind and magnetic fields rising above the corona or being released into space.