| Geyser | 1974-09-20 |
|---|---|
| Congress Pool | 1800 |
| Dabble | 1800 |
| Echinus | 0902, 1202, 1331, 1458, 1631 |
| Emerald Spring | 1800 |
| Orby | 1800 |
| Steamboat | 1800 |
| Whirligig | 1800 |
| Values for Old Faithful Area | 1974-09-20 |
|---|---|
| Astronomical Twilight Begin | 05:29 |
| Nautical Twilight Begin | 06:04 |
| Civil Twilight Begin | 06:39 |
| Sunrise | 07:07 |
| Sunset | 19:25 |
| Civil Twilight End | 19:54 |
| Nautical Twilight End | 20:28 |
| Astronomical Twilight End | 21:03 |
| Moon Illumination | 20.95% |