Answer:
all people on the night side of Earth
Explanation:
Lunar eclipse, also known as eclipse of the moon is a phenomenon that takes place when the sun, the earth and the moon are closely aligned. The earth comes in-between the moon and the sun, blocking the rays of the sun from reaching the moon in the process.
The eclipse which can only happen on a night with full moon makes the moon to appear faded or appear or reddish in color (blood moon).
Lunar eclipse can be viewed by anyone that is on the night side of the earth when the event occur, although viewing it requires some efforts