| Geyser | 1973-09-19 |
|---|---|
| Dabble | 1000 |
| Echinus | 1107, 1107, 1208, 1508, 1607, 1702 |
| Fearless | 1000 |
| Orby | 1000 |
| Palpitator Spring | 1000 |
| Steamboat | 1000 |
| Whirligig | 1700 |
| Yellow Funnel Spring | 1000 |
| Values for Old Faithful Area | 1973-09-19 |
|---|---|
| Astronomical Twilight Begin | 05:28 |
| Nautical Twilight Begin | 06:03 |
| Civil Twilight Begin | 06:38 |
| Sunrise | 07:07 |
| Sunset | 19:26 |
| Civil Twilight End | 19:55 |
| Nautical Twilight End | 20:30 |
| Astronomical Twilight End | 21:05 |
| Moon Illumination | 54.94% |