Daily Sunspot Evaluation
Observation Sheet Wednesday, 15 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)
- 8
- Number of spots (f)
- 42
- Relative number (R)
- 122
- Observer
- SK
- Reading
- all checks consistent
- File
- 19700415.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | G – 2 | 17 | 64E | 269 | |||
| 2 | E – 6 | -6 | 60E | 273 | |||
| 3 | J – 6 | -9 | 14E | 319 | |||
| 4 | A – 1 | -12 | 15E | 318 | |||
| 5 | ? – 5 | -12 | 78W | 51 | |||
| 6 | J – 1 | -2 | 56W | 29 | |||
| 7 | ? – 2 | 10 | 85W | 58 | |||
| 8 | E – 19 | 16 | 32W | 5 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.