| Geyser | 1979-05-25 |
|---|---|
| Africa | 1800 |
| Basin | 1800 |
| Bear Den | 1800 |
| Blue Mud Steam Vent | 1200 |
| Echinus | 1032, 1152, 1434, 1559, 1800 |
| Fireball | 1800 |
| Little Whirligig | 1800 |
| Splutter Pot | 1200, 1800 |
| Vixen | 1800 |
| Values for Old Faithful Area | 1979-05-25 |
|---|---|
| Astronomical Twilight Begin | 03:31 |
| Nautical Twilight Begin | 04:26 |
| Civil Twilight Begin | 05:11 |
| Sunrise | 05:46 |
| Sunset | 20:53 |
| Civil Twilight End | 21:28 |
| Nautical Twilight End | 22:13 |
| Astronomical Twilight End | 23:08 |
| Moon Illumination | 0.64% |