| Geyser | 1991-08-27 |
|---|---|
| Blue | 1800 |
| Constant | 1033, 1510 |
| Echinus | 0940, 1040 maj, 1345, 1550 |
| Fireball | 1217 |
| Morning | 0224 E, 0550 E, 0927, 0927, 1326 E, 1701, 2015 |
| Whirligig | 1155 |
| Values for Old Faithful Area | 1991-08-27 |
|---|---|
| Astronomical Twilight Begin | 04:53 |
| Nautical Twilight Begin | 05:32 |
| Civil Twilight Begin | 06:09 |
| Sunrise | 06:39 |
| Sunset | 20:09 |
| Civil Twilight End | 20:40 |
| Nautical Twilight End | 21:16 |
| Astronomical Twilight End | 21:56 |
| Moon Illumination | 96.44% |