| Geyser | 1975-02-12 |
|---|---|
| Lone Star | 1412 |
| Old Faithful | 0852 short, 0950 long, 1117 short, 1206 long, 1315 short, 1405 long, 1515 short, 1602 long |
| Riverside | 1345 ie |
| Values for Old Faithful Area | 1975-02-12 |
|---|---|
| Astronomical Twilight Begin | 05:49 |
| Nautical Twilight Begin | 06:23 |
| Civil Twilight Begin | 06:57 |
| Sunrise | 07:27 |
| Sunset | 17:47 |
| Civil Twilight End | 18:17 |
| Nautical Twilight End | 18:51 |
| Astronomical Twilight End | 19:25 |
| Moon Illumination | 1.04% |