| Geyser | 1973-09-12 |
|---|---|
| Echinus | 0918, 1010:30, 1111, 1208, 1505, 1604 |
| Little Whirligig | 1035, 1049, 1135, 1146, 1720, 1740 ie, 1748 |
| Orby | 0945 A |
| Whirligig | 1039, 1732 ie, 1745 |
| Values for Old Faithful Area | 1973-09-12 |
|---|---|
| Astronomical Twilight Begin | 05:18 |
| Nautical Twilight Begin | 05:54 |
| Civil Twilight Begin | 06:29 |
| Sunrise | 06:58 |
| Sunset | 19:40 |
| Civil Twilight End | 20:09 |
| Nautical Twilight End | 20:44 |
| Astronomical Twilight End | 21:20 |
| Moon Illumination | 99.83% |