Daily Sunspot Evaluation
Observation Sheet Monday, 31 August 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)
- 11
- Number of spots (f)
- 39
- Relative number (R)
- 149
- Observer
- HA
- Reading
- all checks consistent
- File
- 19700831.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | G – 4 | 21 | 37E | 272 | |||
| 2 | H – 8 | 17 | 66E | 243 | |||
| 3 | B – 4 | -5 | 44E | 265 | |||
| 4 | J – 1 | -24 | 67W | 16 | |||
| 5 | J – 1 | -10 | 35W | 344 | |||
| 6 | J – 4 | -7 | 34W | 343 | |||
| 7 | ? – 1 | 4 | 83W | 32 | |||
| 8 | A – 1 | 6 | 64W | 13 | |||
| 9 | H – 5 | 12 | 50W | 359 | |||
| 10 | H – 6 | 12 | 14W | 323 | |||
| 11 | J – 4 | 13 | 22W | 331 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.