| Geyser | 1973-02-13 |
|---|---|
| Beehive | 1410 |
| Castle | 1020 |
| Grand | 1135 |
| Old Faithful | 0845 long, 0950 long, 1101 short, 1151 long, 1307 short, 1356 long, 1502 long, 1609 long |
| Splendid | 1635 ? |
| Values for Old Faithful Area | 1973-02-13 |
|---|---|
| Astronomical Twilight Begin | 05:48 |
| Nautical Twilight Begin | 06:21 |
| Civil Twilight Begin | 06:55 |
| Sunrise | 07:25 |
| Sunset | 17:49 |
| Civil Twilight End | 18:19 |
| Nautical Twilight End | 18:53 |
| Astronomical Twilight End | 19:27 |
| Moon Illumination | 79.17% |