| Geyser | 1997-04-16 |
|---|---|
| Artemisia | 2006 ie |
| Castle | 1448 |
| Churn | 1351, 1407, 1421 |
| Daisy | 1005, 1147, 1325, 1458, 1939 |
| Grand | 1533 |
| Grotto | 0917 ie, 1336, 1835 ie |
| Old Faithful | 0000-2359 |
| Penta | 0000 A |
| Riverside | 1323 |
| Values for Old Faithful Area | 1997-04-16 |
|---|---|
| Astronomical Twilight Begin | 04:49 |
| Nautical Twilight Begin | 05:29 |
| Civil Twilight Begin | 06:06 |
| Sunrise | 06:36 |
| Sunset | 20:09 |
| Civil Twilight End | 20:39 |
| Nautical Twilight End | 21:16 |
| Astronomical Twilight End | 21:56 |
| Moon Illumination | 64.42% |