| Geyser | 1989-07-28 |
|---|---|
| Corporal | 1200 |
| Echinus | 1030 |
| Emerald Spring | 1200 |
| Monarch | 1200 |
| Palpitator Spring | 1200 |
| Pearl | 1200 |
| Porkchop | 1200 |
| Veteran | 1236 |
| Values for Old Faithful Area | 1989-07-28 |
|---|---|
| Astronomical Twilight Begin | 04:00 |
| Nautical Twilight Begin | 04:49 |
| Civil Twilight Begin | 05:32 |
| Sunrise | 06:06 |
| Sunset | 20:53 |
| Civil Twilight End | 21:27 |
| Nautical Twilight End | 22:09 |
| Astronomical Twilight End | 22:59 |
| Moon Illumination | 21.38% |