| Geyser | 1975-02-13 |
|---|---|
| Event Non-Geyser Related | 1439 |
| Old Faithful | 0932 short, 1015 long, 1137 short, 1220 long, 1332 short, 1422 long, 1538 short, 1623 long |
| Other Geyser | 0000-2359 |
| Values for Old Faithful Area | 1975-02-13 |
|---|---|
| Astronomical Twilight Begin | 05:48 |
| Nautical Twilight Begin | 06:22 |
| Civil Twilight Begin | 06:56 |
| Sunrise | 07:26 |
| Sunset | 17:48 |
| Civil Twilight End | 18:18 |
| Nautical Twilight End | 18:52 |
| Astronomical Twilight End | 19:26 |
| Moon Illumination | 3.81% |