| Geyser | 1973-03-18 |
|---|---|
| Beehive | 1342 |
| Old Faithful | 0847 long, 1009 long, 1111 long, 1222 long, 1337 short, 1416 long, 1532 short, 1623 long |
| Riverside | 1414 |
| Valentine | 0300 A |
| Values for Old Faithful Area | 1973-03-18 |
|---|---|
| Astronomical Twilight Begin | 04:52 |
| Nautical Twilight Begin | 05:26 |
| Civil Twilight Begin | 06:00 |
| Sunrise | 06:29 |
| Sunset | 18:33 |
| Civil Twilight End | 19:01 |
| Nautical Twilight End | 19:35 |
| Astronomical Twilight End | 20:10 |
| Moon Illumination | 99.49% |