| Geyser | 1976-10-30 |
|---|---|
| Castle | 1610 |
| Grand | 1400 |
| Lion | 1139, 1500, 1827 |
| Old Faithful | 0735 long, 0845 short, 0956 short, 1113 long, 1217 long, 1336 short, 1428 long, 1537 short, 1648 long, 1800 |
| Values for Old Faithful Area | 1976-10-30 |
|---|---|
| Astronomical Twilight Begin | 06:20 |
| Nautical Twilight Begin | 06:54 |
| Civil Twilight Begin | 07:28 |
| Sunrise | 07:58 |
| Sunset | 18:15 |
| Civil Twilight End | 18:45 |
| Nautical Twilight End | 19:19 |
| Astronomical Twilight End | 19:53 |
| Moon Illumination | 53.38% |