Daily Sunspot Evaluation
Observation Sheet Friday, 13 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)
- 8
- Number of spots (f)
- 32
- Relative number (R)
- 112
- Observer
- EH
- Reading
- all checks consistent
- File
- 19700313.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | A – 2 | 15 | 0 | 46 | |||
| 2 | J – 1 | 22 | 57E | 349 | |||
| 3 | G – 4 | 0 | 27E | 19 | |||
| 4 | J – 2 | -11 | 13E | 33 | |||
| 5 | E – 18 | -14 | 36W | 82 | |||
| 6 | J – 2 | -13 | 71W | 117 | |||
| 7 | H – 1 | 19 | 52W | 98 | |||
| 8 | A – 2 | 20 | 43W | 89 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.