Daily Sunspot Evaluation
Observation Sheet Tuesday, 22 February 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)
- 10
- Number of spots (f)
- 85
- Relative number (R)
- 185
- Observer
- HM
- Reading
- all checks consistent
- File
- 19720222.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | F – 50 | 10 | 03E | 20 | |||
| 2 | A – 1 | -11 | 60E | 323 | |||
| 3 | G – 14 | -18 | 39E | 344 | |||
| 4 | H – 2 | -18 | 16W | 39 | |||
| 5 | J – 2 | -19 | 72W | 95 | |||
| 6 | H – 6 | -12 | 25W | 48 | |||
| 7 | A – 1 | -10 | 39W | 62 | |||
| 8 | J – 3 | -7 | 38W | 61 | |||
| 9 | J – 4 | 5 | 68W | 91 | |||
| 10 | A – 2 | 15 | 09W | 32 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.