Daily Sunspot Evaluation
Observation Sheet Sunday, 31 March 1968
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)
- 8
- Number of spots (f)
- 58
- Relative number (R)
- 138
- Observer
- SM
- Reading
- all checks consistent
- File
- 19680331.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | A – 2 | -16 | 43°E | 40 | |||
| 2 | C – 4 | -19 | 48°E | 35 | |||
| 3 | C – 8 | -18 | 14°E | 69 | |||
| 4 | E – 14 | -23 | 7°E | 76 | |||
| 5 | B – 11 | -16 | 28W | 111 | |||
| 6 | C – 3 | 11 | 47W | 130 | |||
| 7 | J – 1 | 10 | 34W | 117 | |||
| 8 | E – 15 | 17 | 13°W | 96 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.