Final answer:
To check for the activity causing power outages in clear skies, you should look for solar flares, solar energetic particles, and solar wind. These solar phenomena can disrupt power lines and cause major outages.
Step-by-step explanation:
If the skies are clear but the power to your house goes out, you should check for the activity of solar flares, solar energetic particles, and solar wind.
These solar phenomena, along with coronal mass ejections (CMEs), can disrupt power lines and cause major power outages. Solar flares release a tremendous amount of electromagnetic radiation, while CMEs can eject massive amounts of coronal material into interplanetary space, affecting Earth in various ways.