Daily Sunspot Evaluation
Observation Sheet Tuesday, 14 April 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)
- 7
- Number of spots (f)
- 52
- Relative number (R)
- 122
- Observer
- SM
- Reading
- all checks consistent
- File
- 19700414.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | J – 1 | 17 | 74E | 273 | |||
| 2 | G – 2 | -7 | 74E | 273 | |||
| 3 | D – 8 | -9 | 28E | 319 | |||
| 4 | ? – 14 | -12 | 68W | 55 | |||
| 5 | J – 2 | -3 | 41W | 28 | |||
| 6 | H – 9 | 10 | 69W | 56 | |||
| 7 | E – 16 | 15 | 18W | 5 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.