| Geyser | 1976-01-20 |
|---|---|
| Giantess | 0925, 1120 |
| Grand | 1240 ie |
| Old Faithful | 0952 long, 1106 long, 1219 short, 1307, 1420 short, 1511 long |
| Riverside | 1435 |
| Values for Old Faithful Area | 1976-01-20 |
|---|---|
| Astronomical Twilight Begin | 06:11 |
| Nautical Twilight Begin | 06:45 |
| Civil Twilight Begin | 07:21 |
| Sunrise | 07:53 |
| Sunset | 17:15 |
| Civil Twilight End | 17:47 |
| Nautical Twilight End | 18:22 |
| Astronomical Twilight End | 18:57 |
| Moon Illumination | 87.67% |