Daily Sunspot Evaluation
Observation Sheet Wednesday, 7 March 1973
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)
- 18
- Relative number (R)
- 58
- Observer
- ED
- Reading
- all checks consistent
- File
- 19730307.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | C – 5 | 14 | 39E | 21 | 42 | ||
| 2 | C – 11 | -17 | 40E | 20 | 41 | ||
| 3 | ? – 1 | 7 | 82W | 142 | 36 | ||
| 4 | J – 1 | 7 | 68W | 128 | 43 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.