Daily Sunspot Evaluation
Observation Sheet Saturday, 25 March 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)
- 9
- Number of spots (f)
- 51
- Relative number (R)
- 141
- Observer
- HM
- Reading
- all checks consistent
- File
- 19720325.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | A – 2 | -4 | 21E | 301 | |||
| 2 | B – 7 | -11 | 11E | 311 | |||
| 3 | A – 3 | -21 | 21W | 343 | |||
| 4 | B – 8 | -19 | 56W | 18 | |||
| 5 | B – 3 | -16 | 40W | 2 | |||
| 6 | J – 1 | 8 | 67W | 29 | |||
| 7 | A – 1 | 14 | 76W | 38 | |||
| 8 | C – 7 | 9 | 40W | 2 | |||
| 9 | E – 19 | 8 | 10W | 332 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.