Daily Sunspot Evaluation
Observation Sheet Monday, 20 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)
- 68
- Relative number (R)
- 158
- Observer
- FA
- Reading
- all checks consistent
- File
- 19720320.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | H – 8 | 9 | 00 | 27 | |||
| 2 | A – 3 | 13 | 12E | 15 | |||
| 3 | D – 15 | 9 | 58E | 329 | |||
| 4 | B – 16 | -19 | 11E | 16 | |||
| 5 | A – 2 | -22 | 62W | 89 | |||
| 6 | C – 11 | -8 | 27W | 54 | |||
| 7 | D – 11 | -8 | 39W | 66 | |||
| 8 | J – 1 | 3 | 70W | 97 | |||
| 9 | A – 1 | 9 | 58W | 85 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.