| Geyser | 1999-06-01 |
|---|---|
| Arsenic | 1607 |
| Constant | 1047, 1159, 1605 |
| Echinus | 1155, 1335 ?, 1446, 2217 |
| Fireball | 1428 |
| Grand | 1025 E |
| Great Fountain | 0813 E, 1723 E |
| Pinto | 0621 |
| Whirligig | 0603 |
| Values for Old Faithful Area | 1999-06-01 |
|---|---|
| Astronomical Twilight Begin | 03:21 |
| Nautical Twilight Begin | 04:19 |
| Civil Twilight Begin | 05:05 |
| Sunrise | 05:41 |
| Sunset | 21:00 |
| Civil Twilight End | 21:36 |
| Nautical Twilight End | 22:22 |
| Astronomical Twilight End | 23:20 |
| Moon Illumination | 96.5% |