| Geyser | 1974-12-29 |
|---|---|
| Beehive | 1319 |
| Castle | 0830 ie, 1640 |
| Grand | 1304 |
| Lion | 1625 |
| Old Faithful | 0830 ie long, 0940 short, 1023 short, 1140 short, 1250 short, 1332 long, 1451 short, 1535 long |
| Penta | 1530 |
| Riverside | 1329 |
| Values for Old Faithful Area | 1974-12-29 |
|---|---|
| Astronomical Twilight Begin | 06:13 |
| Nautical Twilight Begin | 06:49 |
| Civil Twilight Begin | 07:26 |
| Sunrise | 07:59 |
| Sunset | 16:51 |
| Civil Twilight End | 17:24 |
| Nautical Twilight End | 18:01 |
| Astronomical Twilight End | 18:36 |
| Moon Illumination | 99.97% |