Daily Sunspot Evaluation
Observation Sheet Thursday, 12 March 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)
- 6
- Number of spots (f)
- 57
- Relative number (R)
- 117
- Observer
- SM
- Reading
- counts consistent, some coordinates doubtful
- File
- 19700312.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | A – 3 | 14 | 43E | 19 | |||
| 2 | A – 1 | -12 | 30E | 32 | |||
| 3 | A – 5 | -15 | 10W | 72 | |||
| 4 | E – 35 | -14 | 20W | 82 | |||
| 5 | C – 11 | -14 | 43W | 111 ⚠ | |||
| 6 | J – 2 | 13 | 34W | 96 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.