| Geyser | 1976-10-16 |
|---|---|
| Castle | 1840 ie |
| Grand | 1049 |
| Old Faithful | 0813 long, 0921 short, 1010 long, 1126 long, 1233 long, 1347 long, 1500 long, 1609 long, 1730 long |
| Riverside | 1124 |
| Values for Old Faithful Area | 1976-10-16 |
|---|---|
| Astronomical Twilight Begin | 06:03 |
| Nautical Twilight Begin | 06:37 |
| Civil Twilight Begin | 07:11 |
| Sunrise | 07:40 |
| Sunset | 18:37 |
| Civil Twilight End | 19:06 |
| Nautical Twilight End | 19:40 |
| Astronomical Twilight End | 20:13 |
| Moon Illumination | 51.19% |