Daily Sunspot Evaluation
Observation Sheet Wednesday, 17 July 1974
There is no typed record for this day. The values below were read by computer from the table on the sheet; when in doubt, see the drawing. Details →
- Number of groups (g)
- 4
- Number of spots (f)
- 21
- Relative number (R)
- 61
- Observer
- FA
- Reading
- all checks consistent
- File
- 19740717.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | C – 3 | -14 | 46E | 294 | |||
| 2 | D – 12 | -12 | 01E | 339 | |||
| 3 | B – 2 | -4 | 00 | 340 | |||
| 4 | H – 4 | -7 | 36W | 16 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.