The animation shows what the eclipse approximately looks like in Rock Springs. Stages and times of the eclipse are outlined below. All times are local time (MST) for Rock Springs.
Time
Phase
Event
Direction
Altitude
7:03 am Sun, Dec 31
Penumbral Eclipse beginsThe Earth's penumbra start touching the Moon's face. Moon close to horizon, so make sure you have free sight to West-northwest.
295°
5.9°
7:37 am Sun, Dec 31
Maximum in Rock SpringsThis is the moment when the eclipse reaches its greatest magnitude while the entire Moon is above the horizon in Rock Springs. The true maximum point of this eclipse cannot be seen in Rock Springs because the Moon is below the horizon at that time. Moon close to horizon, recommend going to a high point.
The curvature of the shadow's path and the apparent rotation of the Moon's disk is due to the Earth's rotation.
The total phase of this lunar eclipse is not visible in Rock Springs, but it can be observed there as a penumbral lunar eclipse. A penumbral lunar eclipse can be a bit hard to see as the shadowed part is only a little bit fainter than the rest of the Moon.