Daily Sunspot Evaluation
Observation Sheet Friday, 9 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)
- 5
- Number of spots (f)
- 17
- Relative number (R)
- 67
- Observer
- HM
- Reading
- all checks consistent
- File
- 19740809.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | ? – 1 | 8 | 84°E | 311 | |||
| 2 | A – 1 | -8 | 60°E | 335 | |||
| 3 | G – 4 | -9 | 25°E | 10 | |||
| 4 | A – 3 | -19 | 46°E | 349 | |||
| 5 | J – 8 | -10 | 17°E | 18 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.