| Geyser | 1973-01-20 |
|---|---|
| Beehive | 1028 |
| Lion | 1316, 1505 |
| Old Faithful | 0931 short, 1014 long, 1126 short, 1222 short, 1338 short, 1420 long, 1536 short, 1626 long |
| Values for Old Faithful Area | 1973-01-20 |
|---|---|
| Astronomical Twilight Begin | 06:10 |
| Nautical Twilight Begin | 06:45 |
| Civil Twilight Begin | 07:21 |
| Sunrise | 07:52 |
| Sunset | 17:16 |
| Civil Twilight End | 17:47 |
| Nautical Twilight End | 18:23 |
| Astronomical Twilight End | 18:58 |
| Moon Illumination | 97.33% |