| Geyser | 1971-05-23 |
|---|---|
| Beehive | 0910, 1730 |
| Castle | 0950, 1530 |
| Fountain | 1950 ie |
| Old Faithful | 0803, 1009 short, 1103 long, 1218, 1313 long, 1435 short, 1522 long, 1641 short |
| Other Geyser | 0000-2200 |
| Values for Old Faithful Area | 1971-05-23 |
|---|---|
| Astronomical Twilight Begin | 03:35 |
| Nautical Twilight Begin | 04:28 |
| Civil Twilight Begin | 05:13 |
| Sunrise | 05:48 |
| Sunset | 20:51 |
| Civil Twilight End | 21:26 |
| Nautical Twilight End | 22:11 |
| Astronomical Twilight End | 23:04 |
| Moon Illumination | 2.24% |