Daily Sunspot Evaluation
Observation Sheet Sunday, 1 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)
- 10
- Number of spots (f)
- 32
- Relative number (R)
- 132
- Observer
- HA
- Reading
- all checks consistent
- File
- 19710801.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | A – 3 | 10 | 08E | 199 | |||
| 2 | B – 2 | 10 | 21E | 186 | |||
| 3 | A – 2 | 7 | 21E | 186 | |||
| 4 | J – 1 | 6 | 14E | 193 | |||
| 5 | A – 1 | -6 | 76E | 131 | |||
| 6 | J – 6 | -26 | 52E | 155 | |||
| 7 | C – 8 | -13 | 23W | 230 | |||
| 8 | J – 2 | -7 | 35W | 242 | |||
| 9 | J – 1 | -13 | 70W | 277 | |||
| 10 | C – 6 | 19 | 02W | 209 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.