| Geyser | 1988-06-20 |
|---|---|
| Echinus | 1000, 1110, 1215, 1315, 1418 |
| Pearl | 1200 |
| Porkchop | 1200 |
| Veteran | 1200 |
| Vixen | 1200 |
| Yellow Funnel Spring | 1200 |
| Values for Old Faithful Area | 1988-06-20 |
|---|---|
| Astronomical Twilight Begin | 03:09 |
| Nautical Twilight Begin | 04:12 |
| Civil Twilight Begin | 05:01 |
| Sunrise | 05:38 |
| Sunset | 21:11 |
| Civil Twilight End | 21:48 |
| Nautical Twilight End | 22:36 |
| Astronomical Twilight End | 23:40 |
| Moon Illumination | 29.92% |