| Geyser | 1977-02-11 |
|---|---|
| Beehive | 1330 ie |
| Castle | 1115 ie |
| Grand | 1610 ie |
| Old Faithful | 0828, 0925, 1049 long, 1200 long, 1316 long, 1432 long, 1546 long, 1709 short |
| Values for Old Faithful Area | 1977-02-11 |
|---|---|
| Astronomical Twilight Begin | 05:50 |
| Nautical Twilight Begin | 06:24 |
| Civil Twilight Begin | 06:58 |
| Sunrise | 07:28 |
| Sunset | 17:46 |
| Civil Twilight End | 18:16 |
| Nautical Twilight End | 18:50 |
| Astronomical Twilight End | 19:24 |
| Moon Illumination | 48.58% |