Daily Sunspot Evaluation
Observation Sheet Tuesday, 15 March 1960
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)
- 9
- Number of spots (f)
- 51
- Relative number (R)
- 141
- Observer
- ET
- Reading
- all checks consistent
- File
- 19600315.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | A – 4 | 17 | 9E | ||||
| 2 | A – 3 | 24 | 27E | ||||
| 3 | B – 6 | 8 | 43E | ||||
| 4 | E – 22 | -9 | 56E | ||||
| 5 | D – 7 | -8 | 58W | ||||
| 6 | A – 2 | -7 | 54W | ||||
| 7 | C – 4 | 23 | 60W | ||||
| 8 | A – 2 | 25 | 51W | ||||
| 9 | A – 1 | 13 | 34W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.