| Geyser | 1982-07-31 |
|---|---|
| Cistern Spring | 1200 |
| Corporal | 1200 |
| Dog's Leg Spring | 1200 |
| Echinus | 1013, 1047, 1235 |
| Fearless | 1200 |
| Giantess | 2239 |
| Minute | 1200 |
| Monarch | 1200 |
| Morning | 0143 |
| Palpitator Spring | 1200 |
| Steamboat | 1200 |
| Veteran | 1200 |
| Values for Old Faithful Area | 1982-07-31 |
|---|---|
| Astronomical Twilight Begin | 04:05 |
| Nautical Twilight Begin | 04:53 |
| Civil Twilight Begin | 05:35 |
| Sunrise | 06:09 |
| Sunset | 20:50 |
| Civil Twilight End | 21:23 |
| Nautical Twilight End | 22:05 |
| Astronomical Twilight End | 22:54 |
| Moon Illumination | 81.16% |