| Geyser | 1973-03-17 |
|---|---|
| Arsenic | 0800 |
| Bear Den | 0821 ie |
| Ledge | 0000 A, 1347, 2100 |
| Old Faithful | 0838 long, 1109 short, 1157 long, 1309 short, 1406 short, 1448 long, 1603 long |
| Valentine | 0000 |
| Values for Old Faithful Area | 1973-03-17 |
|---|---|
| Astronomical Twilight Begin | 04:54 |
| Nautical Twilight Begin | 05:28 |
| Civil Twilight Begin | 06:02 |
| Sunrise | 06:31 |
| Sunset | 18:31 |
| Civil Twilight End | 19:00 |
| Nautical Twilight End | 19:34 |
| Astronomical Twilight End | 20:09 |
| Moon Illumination | 96.81% |