| Geyser | 1978-03-25 |
|---|---|
| Blue | 0927 |
| Blue Mud Steam Vent | 1200 |
| Echinus | 1134, 1358 |
| Monarch | 1800 |
| Orby | 1200 A |
| Veteran | 1132, 1423 |
| Vixen | 1800 |
| Whirligig | 0923 |
| Values for Old Faithful Area | 1978-03-25 |
|---|---|
| Astronomical Twilight Begin | 04:38 |
| Nautical Twilight Begin | 05:13 |
| Civil Twilight Begin | 05:48 |
| Sunrise | 06:17 |
| Sunset | 18:41 |
| Civil Twilight End | 19:10 |
| Nautical Twilight End | 19:44 |
| Astronomical Twilight End | 20:20 |
| Moon Illumination | 99.57% |