Daily Sunspot Evaluation
Observation Sheet Saturday, 17 August 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)
- 44
- Relative number (R)
- 84
- Observer
- ED
- Reading
- all checks consistent
- File
- 19740817.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | J – 1 | -14 | 32E | 257 | |||
| 2 | B – 17 | -17 | 50W | 339 | |||
| 3 | H – 7 | -4 | 53W | 342 | |||
| 4 | D – 19 | 9 | 36W | 325 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.