Daily Sunspot Evaluation
Observation Sheet Saturday, 11 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)
- 6
- Number of spots (f)
- 33
- Relative number (R)
- 93
- Observer
- ED
- Reading
- all checks consistent
- File
- 19720311.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | H – 5 | 16 | 22E | 121 | |||
| 2 | E – 13 | 16 | 38E | 105 | |||
| 3 | J – 1 | -19 | 53E | 90 | |||
| 4 | G – 5 | -21 | 01E | 142 | |||
| 5 | H – 4 | -9 | 38W | 181 | |||
| 6 | H – 5 | -9 | 54W | 197 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.