| Geyser | 1973-09-16 |
|---|---|
| Cistern Spring | 1800 |
| Echinus | 1020, 1219, 1325, 1431, 1537, 1642:30 |
| Little Whirligig | 1021, 1512 |
| Orby | 1800 |
| Rubble | 1051 ie |
| Veteran | 1054 |
| Whirligig | 1730 |
| Values for Old Faithful Area | 1973-09-16 |
|---|---|
| Astronomical Twilight Begin | 05:24 |
| Nautical Twilight Begin | 06:00 |
| Civil Twilight Begin | 06:34 |
| Sunrise | 07:03 |
| Sunset | 19:32 |
| Civil Twilight End | 20:01 |
| Nautical Twilight End | 20:36 |
| Astronomical Twilight End | 21:11 |
| Moon Illumination | 85.17% |