| Geyser | 1973-02-01 |
|---|---|
| Artemisia | 1142 |
| Beehive | 1650 |
| Old Faithful | 0842 long, 1055 long, 1207 short, 1254 long, 1407 short, 1449 long, 1612 short, 1650 long |
| Riverside | 1230 |
| Values for Old Faithful Area | 1973-02-01 |
|---|---|
| Astronomical Twilight Begin | 06:01 |
| Nautical Twilight Begin | 06:35 |
| Civil Twilight Begin | 07:10 |
| Sunrise | 07:41 |
| Sunset | 17:32 |
| Civil Twilight End | 18:03 |
| Nautical Twilight End | 18:38 |
| Astronomical Twilight End | 19:12 |
| Moon Illumination | 4.39% |