| Geyser | 1972-05-18 |
|---|---|
| Castle | 1100 |
| Depression | 1458 |
| Grand | 1032 |
| Grotto | 1428 |
| Grotto Fountain | 1421 |
| Old Faithful | 0823, 0911 long, 1029 short, 1121 long, 1249 short, 1335 long, 1446 short, 1539 long, 1651 short |
| Riverside | 1440 |
| Values for Old Faithful Area | 1972-05-18 |
|---|---|
| Astronomical Twilight Begin | 03:42 |
| Nautical Twilight Begin | 04:34 |
| Civil Twilight Begin | 05:17 |
| Sunrise | 05:51 |
| Sunset | 20:47 |
| Civil Twilight End | 21:21 |
| Nautical Twilight End | 22:05 |
| Astronomical Twilight End | 22:56 |
| Moon Illumination | 31.6% |