| Geyser | 1973-01-22 |
|---|---|
| Beehive | 1155 |
| Castle | 1535 |
| Grand | 1430 |
| Old Faithful | 0827 long, 0938 short, 1021 long, 1134 short, 1237 long, 1349 long, 1505 long, 1617 long |
| Riverside | 1100 |
| Values for Old Faithful Area | 1973-01-22 |
|---|---|
| Astronomical Twilight Begin | 06:09 |
| Nautical Twilight Begin | 06:44 |
| Civil Twilight Begin | 07:19 |
| Sunrise | 07:51 |
| Sunset | 17:18 |
| Civil Twilight End | 17:50 |
| Nautical Twilight End | 18:25 |
| Astronomical Twilight End | 19:00 |
| Moon Illumination | 85.85% |