| Geyser | 1980-06-20 |
|---|---|
| Echinus | 0913, 0940, 1509, 1541, 1606, 1637, 1709 |
| Emerald Spring | 1200 |
| Guardian | 1152 |
| Values for Old Faithful Area | 1980-06-20 |
|---|---|
| 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 | 47.47% |