| Geyser | 1986-04-12 |
|---|---|
| Echinus | 1201, 1300, 1352 |
| Emerald Spring | 1200 |
| Fantail | 1014, 1725 ie |
| Steamboat | 1200 |
| Values for Old Faithful Area | 1986-04-12 |
|---|---|
| Astronomical Twilight Begin | 03:59 |
| Nautical Twilight Begin | 04:37 |
| Civil Twilight Begin | 05:14 |
| Sunrise | 05:44 |
| Sunset | 19:03 |
| Civil Twilight End | 19:33 |
| Nautical Twilight End | 20:10 |
| Astronomical Twilight End | 20:48 |
| Moon Illumination | 8.41% |