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Viewers will see a normal full moon at first starting at around 10:35 p.m. Eastern time, at that time, the Earth's shadow will begin to pass in front of the moon, blocking almost all of the sun's light from reaching it. Observers will see the moon appear to be progressively' swallowed up' starting from the lower left. This process will end at 11:40 p.m., when the Earth's shadow covers the whole of the moon's surface ; this is the beginning of' totality.' This will last until around 12:40 a.m., when the motion of the Earth's shadow will carry it past the moon, and the moon will gradually again be lit by the sun. At 1:45 a.m., the moon will be fully visible again.