| Geyser | 1971-02-19 |
|---|---|
| Beehive | 1134 |
| Grand | 1155 |
| New | 1155 |
| Old Faithful | 1126 short, 1208 long, 1321 short, 1418, 1529 |
| Riverside | 1045 |
| Round | 1430 |
| Values for Old Faithful Area | 1971-02-19 |
|---|---|
| Astronomical Twilight Begin | 05:40 |
| Nautical Twilight Begin | 06:14 |
| Civil Twilight Begin | 06:47 |
| Sunrise | 07:17 |
| Sunset | 17:56 |
| Civil Twilight End | 18:26 |
| Nautical Twilight End | 19:00 |
| Astronomical Twilight End | 19:34 |
| Moon Illumination | 42% |