| Geyser | 1989-09-28 |
|---|---|
| Cistern Spring | 1200 |
| Crater Spring | 1200 |
| Echinus | 1227 maj |
| Emerald Spring | 1200 |
| Green Dragon Spring | 1200 |
| Porkchop | 1200 |
| Steamboat | 1200 |
| Yellow Funnel Spring | 1200 |
| Values for Old Faithful Area | 1989-09-28 |
|---|---|
| Astronomical Twilight Begin | 05:40 |
| Nautical Twilight Begin | 06:15 |
| Civil Twilight Begin | 06:49 |
| Sunrise | 07:17 |
| Sunset | 19:09 |
| Civil Twilight End | 19:38 |
| Nautical Twilight End | 20:12 |
| Astronomical Twilight End | 20:46 |
| Moon Illumination | 2.5% |