| Geyser | 1996-04-15 |
|---|---|
| Great Fountain | 1920 ie |
| Grotto | 1034 ie |
| Little Squirt | 1934 ie |
| Plume | 1938 |
| Values for Old Faithful Area | 1996-04-15 |
|---|---|
| Astronomical Twilight Begin | 04:51 |
| Nautical Twilight Begin | 05:30 |
| Civil Twilight Begin | 06:07 |
| Sunrise | 06:38 |
| Sunset | 20:08 |
| Civil Twilight End | 20:38 |
| Nautical Twilight End | 21:15 |
| Astronomical Twilight End | 21:54 |
| Moon Illumination | 8.64% |