Daily Sunspot Evaluation
Observation Sheet Wednesday, 10 April 1974
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)
- 3
- Number of spots (f)
- 74
- Relative number (R)
- 104
- Observer
- HM
- Reading
- all checks consistent
- File
- 19740410.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | B – 3 | -15 | 29E | 164 | |||
| 2 | E – 62 | -12 | 09E | 184 | |||
| 3 | C – 9 | -5 | 23W | 216 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.