Daily Sunspot Evaluation
Observation Sheet Thursday, 10 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)
- 13
- Number of spots (f)
- 49
- Relative number (R)
- 179
- Observer
- HA
- Reading
- all checks consistent
- File
- 19700910.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | A – 1 | 13 | 72E | 104 | |||
| 2 | G – 4 | 4 | 27E | 149 | |||
| 3 | D – 8 | -10 | 69E | 107 | |||
| 4 | C – 8 | -17 | 24E | 152 | |||
| 5 | A – 1 | -20 | 20E | 156 | |||
| 6 | A – 2 | -9 | 03W | 179 | |||
| 7 | J – 1 | -12 | 19W | 195 | |||
| 8 | A – 5 | -8 | 18W | 194 | |||
| 9 | J – 1 | 10 | 17W | 193 | |||
| 10 | H – 9 | 16 | 68W | 244 | |||
| 11 | A – 3 | 18 | 45W | 221 | |||
| 12 | J – 2 | 22 | 25W | 201 | |||
| 13 | A – 4 | 24 | 13W | 189 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.