Daily Sunspot Evaluation
Observation Sheet Monday, 31 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)
- 4
- Number of spots (f)
- 34
- Relative number (R)
- 74
- Observer
- FA
- Reading
- all checks consistent
- File
- 19720131.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | B – 5 | 9 | 05E | 308 | |||
| 2 | D – 20 | -16 | 30W | 343 | |||
| 3 | C – 8 | 10 | 62W | 15 | |||
| 4 | J – 1 | 13 | 13W | 326 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.