Daily Sunspot Evaluation
Observation Sheet Wednesday, 15 March 1961
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)
- 13
- Relative number (R)
- 53
- Observer
- PO
- Reading
- all checks consistent
- File
- 19610315.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | C – 5 | 22 | 32E | ||||
| 2 | J – 1 | 6 | 56E | ||||
| 3 | H – 4 | -9 | 14W | ||||
| 4 | A – 3 | 21 | 34W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.