| Geyser | 1973-09-15 |
|---|---|
| Dabble | 0945 |
| Echinus | 1017, 1116, 1214, 1525, 1625 |
| Fearless | 0915 |
| Mystic Spring | 0915 |
| Orby | 0945 ie |
| Palpitator Spring | 0915 |
| Rubble | 0945 |
| Yellow Funnel Spring | 0915 |
| Values for Old Faithful Area | 1973-09-15 |
|---|---|
| Astronomical Twilight Begin | 05:23 |
| Nautical Twilight Begin | 05:58 |
| Civil Twilight Begin | 06:33 |
| Sunrise | 07:02 |
| Sunset | 19:34 |
| Civil Twilight End | 20:03 |
| Nautical Twilight End | 20:38 |
| Astronomical Twilight End | 21:13 |
| Moon Illumination | 92.17% |