| Geyser | 1999-06-12 |
|---|---|
| Echinus | 0920, 1245, 1345, 1455, 1615, 1845, 1950 |
| Grand | 1105 E |
| Great Fountain | 0123 E, 1048 E, 2208 E |
| Lone Pine | 0951 E |
| Pinto | 1745 |
| Whirligig | 1618 |
| Values for Old Faithful Area | 1999-06-12 |
|---|---|
| Astronomical Twilight Begin | 03:11 |
| Nautical Twilight Begin | 04:13 |
| Civil Twilight Begin | 05:01 |
| Sunrise | 05:38 |
| Sunset | 21:08 |
| Civil Twilight End | 21:44 |
| Nautical Twilight End | 22:32 |
| Astronomical Twilight End | 23:34 |
| Moon Illumination | 3.7% |