| Geyser | 1973-03-12 |
|---|---|
| Arsenic | 1200-1815, 1342 |
| Ebony | 1802, 1802 min |
| Fireball | 1340 |
| Guardian | 1809 |
| Old Faithful | 0849 long, 0954 short, 1104 long, 1222 short, 1332 short, 1440 long, 1550 long, 1656 short |
| Valentine | 1802 |
| Values for Old Faithful Area | 1973-03-12 |
|---|---|
| Astronomical Twilight Begin | 05:03 |
| Nautical Twilight Begin | 05:38 |
| Civil Twilight Begin | 06:11 |
| Sunrise | 06:40 |
| Sunset | 18:25 |
| Civil Twilight End | 18:54 |
| Nautical Twilight End | 19:28 |
| Astronomical Twilight End | 20:02 |
| Moon Illumination | 54.51% |