| Geyser | 2000-02-29 |
|---|---|
| Great Fountain | 0600 E, 1445 E, 2346 E |
| Lakeshore | 1706 min |
| Values for Old Faithful Area | 2000-02-29 |
|---|---|
| Astronomical Twilight Begin | 05:24 |
| Nautical Twilight Begin | 05:58 |
| Civil Twilight Begin | 06:31 |
| Sunrise | 07:01 |
| Sunset | 18:10 |
| Civil Twilight End | 18:39 |
| Nautical Twilight End | 19:13 |
| Astronomical Twilight End | 19:46 |
| Moon Illumination | 30.59% |