Daily Sunspot Evaluation
Observation Sheet Tuesday, 1 September 1970
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)
- 70
- Relative number (R)
- 170
- Observer
- FA
- Reading
- counts consistent, some coordinates doubtful
- File
- 19700901.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | H – 6 | 21 | 20E | 274 | |||
| 2 | A – 8 | 20 | 35E | 259 | |||
| 3 | C – 31 | 17 | 54E | 240 | |||
| 4 | B – 6 | 4 | 23E | 271 | |||
| 5 | A – 4 | -6 | 33E | 261 | |||
| 6 | J – 5 | -7 | 26E | 268 | |||
| 7 | J – 1 | -10 | 49W | 343 | |||
| 8 | A – 1 | -7 | 40W | 343 ⚠ | |||
| 9 | J – 5 | 13 | 63W | 357 | |||
| 10 | J – 3 | 12 | 35W | 329 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.