Daily Sunspot Evaluation
Observation Sheet Sunday, 13 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)
- 11
- Number of spots (f)
- 31
- Relative number (R)
- 141
- Observer
- MÖ
- Reading
- counts consistent, some coordinates doubtful
- File
- 19700913.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | B – 5 | -10 | 34E | 103 | |||
| 2 | G – 4 | -11 | 22E | 115 | |||
| 3 | A – 5 | -22 | 51E | 86 | |||
| 4 | J – 2 | -17 | 18W | 155 | |||
| 5 | A – 2 | -17 | 54W | 131 ⚠ | |||
| 6 | A – 2 | -10 | 43W | 180 | |||
| 7 | A – 1 | -15 | 58W | 135 ⚠ | |||
| 8 | C – 3 | -12 | 57W | 194 | |||
| 9 | B – 4 | 4 | 14W | 151 | |||
| 10 | J – 1 | 10 | 58W | 135 ⚠ | |||
| 11 | J – 2 | 21 | 65W | 202 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.