| Geyser | 1975-10-23 |
|---|---|
| Castle | 1405 ie |
| Giantess | 1053, 1219, 1316 |
| Grand | 1101 ie |
| Old Faithful | 1011 long, 1137 long, 1246 short, 1333 long, 1453 short, 1539 long |
| Values for Old Faithful Area | 1975-10-23 |
|---|---|
| Astronomical Twilight Begin | 06:11 |
| Nautical Twilight Begin | 06:44 |
| Civil Twilight Begin | 07:18 |
| Sunrise | 07:48 |
| Sunset | 18:27 |
| Civil Twilight End | 18:56 |
| Nautical Twilight End | 19:30 |
| Astronomical Twilight End | 20:04 |
| Moon Illumination | 91.45% |