Daily Sunspot Evaluation
Observation Sheet Monday, 7 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)
- 17
- Number of spots (f)
- 111
- Relative number (R)
- 281
- Observer
- HA
- Reading
- all checks consistent
- File
- 19700907.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | H – 9 | 22 | 11E | 205 | |||
| 2 | C – 5 | 24 | 26E | 190 | |||
| 3 | H – 3 | 10 | 22E | 194 | |||
| 4 | G – 6 | -16 | 66E | 150 | |||
| 5 | A – 5 | -13 | 30E | 186 | |||
| 6 | A – 2 | -10 | 24E | 192 | |||
| 7 | A – 1 | -7 | 20E | 196 | |||
| 8 | J – 2 | -13 | 23E | 193 | |||
| 9 | B – 6 | -28 | 33W | 249 | |||
| 10 | A – 1 | -22 | 25W | 241 | |||
| 11 | J – 1 | -21 | 28W | 244 | |||
| 12 | A – 1 | -12 | 53W | 269 | |||
| 13 | G – 6 | -8 | 55W | 271 | |||
| 14 | H – 40 | 17 | 27W | 243 | |||
| 15 | D – 19 | 18 | 47W | 263 | |||
| 16 | H – 1 | 22 | 58W | 274 | |||
| 17 | A – 3 | 22 | 20W | 236 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.