Daily Sunspot Evaluation
Observation Sheet Saturday, 12 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)
- 8
- Number of spots (f)
- 47
- Relative number (R)
- 127
- Observer
- MA
- Reading
- all checks consistent
- File
- 19700912.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | A – 1 | 10 | 44'E | 106 | |||
| 2 | A – 2 | -13 | 48'E | 102 | |||
| 3 | G – 10 | -13 | 37'E | 113 | |||
| 4 | B – 10 | -17 | 02'W | 152 | |||
| 5 | J – 2 | 3 | 02'W | 152 | |||
| 6 | B – 19 | -11 | 42'W | 192 | |||
| 7 | J – 1 | 13 | 44'W | 194 | |||
| 8 | J – 2 | 24 | 50'W | 200 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.