| Geyser | 1982-09-01 |
|---|---|
| Bear Den | 1325, 1902 |
| Echinus | 0915, 0953, 1026, 1107, 1149, 1230, 1309, 1346, 1424 |
| Steamboat | 2349 |
| Whirligig | 2018 |
| Values for Old Faithful Area | 1982-09-01 |
|---|---|
| Astronomical Twilight Begin | 05:01 |
| Nautical Twilight Begin | 05:40 |
| Civil Twilight Begin | 06:16 |
| Sunrise | 06:45 |
| Sunset | 20:00 |
| Civil Twilight End | 20:30 |
| Nautical Twilight End | 21:06 |
| Astronomical Twilight End | 21:44 |
| Moon Illumination | 94.91% |