Daily Sunspot Evaluation
Observation Sheet Monday, 24 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)
- 7
- Number of spots (f)
- 38
- Relative number (R)
- 108
- Observer
- HM
- Reading
- all checks consistent
- File
- 19720424.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | J – 3 | 17 | 34E | 252 | |||
| 2 | B – 5 | 4 | 53E | 233 | |||
| 3 | J – 1 | -6 | 34E | 252 | |||
| 4 | C – 13 | -14 | 13E | 273 | |||
| 5 | H – 4 | -10 | 32W | 318 | |||
| 6 | J – 7 | -4 | 37W | 323 | |||
| 7 | B – 5 | 9 | 16W | 302 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.