| Geyser | 1983-02-19 |
|---|---|
| Africa | 1200 |
| Fan-Norris | 1200 |
| Hurricane Vent | 1200 |
| Incline | 1100, 1112, 1124:20, 1136 |
| Morning | 0400 |
| Pinto | 1200 |
| Sunday | 1200 |
| Whirligig | 1200 |
| Values for Old Faithful Area | 1983-02-19 |
|---|---|
| Astronomical Twilight Begin | 05:40 |
| Nautical Twilight Begin | 06:13 |
| Civil Twilight Begin | 06:47 |
| Sunrise | 07:17 |
| Sunset | 17:57 |
| Civil Twilight End | 18:26 |
| Nautical Twilight End | 19:00 |
| Astronomical Twilight End | 19:34 |
| Moon Illumination | 34.72% |