| Geyser | 1981-08-10 |
|---|---|
| Echinus | 1051 min, 1100 min, 1107, 1243 min, 1252 min, 1259, 1632 min, 1638 |
| Morning | 0923, 1900 |
| Rubble | 1800 |
| Valentine | 1421 |
| Whirligig | 1349, 1423 |
| Values for Old Faithful Area | 1981-08-10 |
|---|---|
| Astronomical Twilight Begin | 04:24 |
| Nautical Twilight Begin | 05:08 |
| Civil Twilight Begin | 05:48 |
| Sunrise | 06:20 |
| Sunset | 20:36 |
| Civil Twilight End | 21:08 |
| Nautical Twilight End | 21:48 |
| Astronomical Twilight End | 22:32 |
| Moon Illumination | 72.36% |