Daily Sunspot Evaluation
Observation Sheet Sunday, 4 July 1971
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)
- 6
- Number of spots (f)
- 90
- Relative number (R)
- 150
- Observer
- DK
- Reading
- all checks consistent
- File
- 19710704.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | B – 6 | -13 | 35E | 182 | |||
| 2 | F – 59 | -12 | 11W | 228 | |||
| 3 | G – 15 | -8 | 23W | 240 | |||
| 4 | B – 7 | 6 | 31W | 248 | |||
| 5 | ? – 1 | 16 | 77W | 294 | |||
| 6 | J – 2 | 16 | 11W | 228 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.