| Geyser | 1980-06-01 |
|---|---|
| Africa | 1800 |
| Arsenic | 1800 |
| Blue | 1800 |
| Constant | 1800 |
| Dark Cavern | 1800 |
| Echinus | 1500, 1536 |
| Splutter Pot | 1800 |
| Veteran | 1610 |
| Whirligig | 1800 |
| Values for Old Faithful Area | 1980-06-01 |
|---|---|
| Astronomical Twilight Begin | 03:20 |
| Nautical Twilight Begin | 04:18 |
| Civil Twilight Begin | 05:05 |
| Sunrise | 05:41 |
| Sunset | 21:00 |
| Civil Twilight End | 21:36 |
| Nautical Twilight End | 22:23 |
| Astronomical Twilight End | 23:21 |
| Moon Illumination | 94.08% |