| Geyser | 1975-01-31 |
|---|---|
| Beehive | 1401 |
| Grand | 1431 |
| Old Faithful | 0902 long, 1023 long, 1132 long, 1244 short, 1329 long, 1444 short, 1534 long, 1649 short |
| Values for Old Faithful Area | 1975-01-31 |
|---|---|
| Astronomical Twilight Begin | 06:03 |
| Nautical Twilight Begin | 06:37 |
| Civil Twilight Begin | 07:12 |
| Sunrise | 07:43 |
| Sunset | 17:30 |
| Civil Twilight End | 18:01 |
| Nautical Twilight End | 18:36 |
| Astronomical Twilight End | 19:10 |
| Moon Illumination | 81.25% |