Daily Sunspot Evaluation
Observation Sheet Wednesday, 4 August 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)
- 5
- Number of spots (f)
- 17
- Relative number (R)
- 67
- Observer
- HA
- Reading
- all checks consistent
- File
- 19710804.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | J – 1 | -8 | 69E | 98 | |||
| 2 | A – 5 | -6 | 33E | 134 | |||
| 3 | A – 6 | -26 | 09E | 158 | |||
| 4 | H – 2 | -13 | 61W | 228 | |||
| 5 | G – 3 | 6 | 25W | 192 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.