| Geyser | 1973-09-24 |
|---|---|
| Cistern Spring | 1800 |
| Congress Pool | 1200 |
| Echinus | 0940, 1208, 1408, 1508 A, 1607 |
| Mud Spring | 1200 |
| Mystic Spring | 1200 |
| Orby | 0930 A |
| Yellow Funnel Spring | 1200 |
| Values for Old Faithful Area | 1973-09-24 |
|---|---|
| Astronomical Twilight Begin | 05:35 |
| Nautical Twilight Begin | 06:10 |
| Civil Twilight Begin | 06:44 |
| Sunrise | 07:12 |
| Sunset | 19:17 |
| Civil Twilight End | 19:46 |
| Nautical Twilight End | 20:20 |
| Astronomical Twilight End | 20:55 |
| Moon Illumination | 6.63% |