Daily Sunspot Evaluation
Observation Sheet Saturday, 1 January 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)
- 18
- Relative number (R)
- 68
- Observer
- HM
- Reading
- all checks consistent
- File
- 19720101.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | J – 1 | 23 | 16E | 332 | |||
| 2 | J – 2 | -4 | 18E | 330 | |||
| 3 | A – 1 | -19 | 45E | 303 | |||
| 4 | C – 7 | -8 | 12W | 0 | |||
| 5 | C – 7 | -14 | 71W | 59 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.