Daily Sunspot Evaluation
Observation Sheet Friday, 2 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)
- 71
- Relative number (R)
- 131
- Observer
- HA
- Reading
- all checks consistent
- File
- 19710702.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | J – 2 | 16 | 14E | 229 | |||
| 2 | B – 11 | -9 | 38E | 205 | |||
| 3 | F – 38 | -13 | 17E | 226 | |||
| 4 | G – 6 | -8 | 04E | 239 | |||
| 5 | G – 7 | 15 | 52W | 295 | |||
| 6 | D – 7 | 6 | 06W | 249 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.