Daily Sunspot Evaluation
Observation Sheet Sunday, 11 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)
- 22
- Relative number (R)
- 72
- Observer
- HM
- Reading
- all checks consistent
- File
- 19740811.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | J – 1 | 7 | 58E | 311 | |||
| 2 | C – 16 | -8 | 30E | 339 | |||
| 3 | B – 3 | -20 | 17E | 352 | |||
| 4 | J – 1 | -7 | 01E | 8 | |||
| 5 | J – 1 | -9 | 09W | 18 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.