| Geyser | 1971-05-15 |
|---|---|
| Beehive | 1230 |
| Castle | 1415 ie |
| Grotto | 1040 ie |
| Grotto Fountain | 1035 |
| Old Faithful | 0906 short, 1117 short, 1202 long, 1323 short, 1407 long, 1539 short, 1624 long |
| Vent | 1040 ie |
| Values for Old Faithful Area | 1971-05-15 |
|---|---|
| Astronomical Twilight Begin | 03:49 |
| Nautical Twilight Begin | 04:39 |
| Civil Twilight Begin | 05:22 |
| Sunrise | 05:55 |
| Sunset | 20:43 |
| Civil Twilight End | 21:16 |
| Nautical Twilight End | 21:59 |
| Astronomical Twilight End | 22:49 |
| Moon Illumination | 77.2% |