| Geyser | 1983-09-03 |
|---|---|
| Cistern Spring | 1200 |
| Echinus | 1502 |
| Mercury | 1526, 1618, 1656 |
| Steamboat | 1200 |
| Veteran | 1440 |
| Whirligig | 1310, 1615 |
| Values for Old Faithful Area | 1983-09-03 |
|---|---|
| Astronomical Twilight Begin | 05:04 |
| Nautical Twilight Begin | 05:42 |
| Civil Twilight Begin | 06:18 |
| Sunrise | 06:48 |
| Sunset | 19:57 |
| Civil Twilight End | 20:27 |
| Nautical Twilight End | 21:03 |
| Astronomical Twilight End | 21:40 |
| Moon Illumination | 20.65% |