| Geyser | 1974-09-18 |
|---|---|
| Echinus | 0900, 1016, 1142, 1308, 1435, 1602, 1728 |
| Emerald Spring | 1800 |
| Little Whirligig | 1053, 1311, 1509, 1800 |
| Whirligig | 1800 |
| Values for Old Faithful Area | 1974-09-18 |
|---|---|
| Astronomical Twilight Begin | 05:26 |
| Nautical Twilight Begin | 06:02 |
| Civil Twilight Begin | 06:36 |
| Sunrise | 07:05 |
| Sunset | 19:29 |
| Civil Twilight End | 19:58 |
| Nautical Twilight End | 20:32 |
| Astronomical Twilight End | 21:07 |
| Moon Illumination | 6.28% |