| Geyser | 1973-05-10 |
|---|---|
| Bear Den | 0840, 1122, 1402 |
| Beehive | 1025 |
| Castle | 1350 |
| Daisy | 1205 |
| Grand | 1400 |
| Ledge | 2049 |
| Oblong | 1200 |
| Old Faithful | 0927, 1015, 1132, 1217, 1331, 1435, 1552, 1706 |
| Riverside | 1119, 1700 |
| Splendid | 0800 |
| Values for Old Faithful Area | 1973-05-10 |
|---|---|
| Astronomical Twilight Begin | 03:58 |
| Nautical Twilight Begin | 04:46 |
| Civil Twilight Begin | 05:28 |
| Sunrise | 06:01 |
| Sunset | 20:38 |
| Civil Twilight End | 21:11 |
| Nautical Twilight End | 21:52 |
| Astronomical Twilight End | 22:40 |
| Moon Illumination | 58.17% |