Final answer:
Solar activity, particularly coronal holes, solar flares, and coronal mass ejections, increases the solar wind particles that create auroras when interacting with Earth's magnetosphere and atmosphere.
Step-by-step explanation:
The event that increases solar winds to create auroras on Earth is primarily related to increased solar activity, including solar phenomena such as coronal holes, solar flares, and coronal mass ejections (CMEs). These conditions allow more charged particles to flow from the Sun into space. When these energetically charged particles reach Earth's magnetosphere, they are funneled towards the poles by the magnetic field lines and collide with particles in our atmosphere. This interaction produces the vibrant and colorful displays in the sky known as auroras, visible as aurora borealis or the northern lights and aurora australis or the southern lights. Specifically, auroral activity has been noted to increase when the number of sunspots is high, signifying more active solar conditions.