| Geyser | 1979-08-12 |
|---|---|
| Constant | 1551:56 |
| Dark Cavern | 1551 |
| Echinus | 1110, 1215, 1403, 1510, 1607, 1745 |
| Emerald Spring | 1200 |
| Little Whirligig | 1552:37 |
| Porkchop | 1451 ie |
| Steamboat | 1200 |
| Veteran | 1440 maj |
| Whirligig | 1157, 1609, 1800 |
| Values for Old Faithful Area | 1979-08-12 |
|---|---|
| Astronomical Twilight Begin | 04:27 |
| Nautical Twilight Begin | 05:10 |
| Civil Twilight Begin | 05:50 |
| Sunrise | 06:22 |
| Sunset | 20:34 |
| Civil Twilight End | 21:06 |
| Nautical Twilight End | 21:45 |
| Astronomical Twilight End | 22:29 |
| Moon Illumination | 76.92% |