Daily Sunspot Evaluation
Observation Sheet Thursday, 9 July 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)
- 92
- Relative number (R)
- 192
- Observer
- FA
- Reading
- all checks consistent
- File
- 19700709.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | H – 13 | 16 | 24E | 265 | |||
| 2 | J – 2 | 16 | 60E | 229 | |||
| 3 | ? – 2 | 17 | 89E | 200 | |||
| 4 | A – 3 | 5 | 43E | 246 | |||
| 5 | B – 10 | -12 | 16W | 305 | |||
| 6 | E – 43 | -10 | 28W | 317 | |||
| 7 | A – 1 | -22 | 69W | 358 | |||
| 8 | H – 4 | -9 | 71W | 0 | |||
| 9 | J – 4 | -8 | 76W | 5 | |||
| 10 | B – 10 | 12 | 22W | 311 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.