Daily Sunspot Evaluation
Observation Sheet Monday, 10 April 1972
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)
- 5
- Number of spots (f)
- 34
- Relative number (R)
- 84
- Observer
- FA
- Reading
- all checks consistent
- File
- 19720410.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | E – 9 | -7 | 25E | 84 | |||
| 2 | C – 10 | -11 | 57E | 52 | |||
| 3 | C – 12 | -15 | 19E | 90 | |||
| 4 | J – 1 | -17 | 27E | 82 | |||
| 5 | B – 2 | -8 | 22W | 131 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.