Daily Sunspot Evaluation
Observation Sheet Sunday, 19 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)
- 10
- Number of spots (f)
- 55
- Relative number (R)
- 155
- Observer
- HM
- Reading
- all checks consistent
- File
- 19720319.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | H – 5 | 8 | 11E | 29 | |||
| 2 | D – 7 | 9 | 71E | 329 | |||
| 3 | D – 13 | -19 | 24E | 16 | |||
| 4 | A – 1 | -19 | 50W | 90 | |||
| 5 | C – 7 | -8 | 14W | 54 | |||
| 6 | D – 17 | -9 | 22W | 62 | |||
| 7 | J – 1 | 4 | 57W | 97 | |||
| 8 | J – 1 | 13 | 71W | 111 | |||
| 9 | J – 1 | 16 | 78W | 118 | |||
| 10 | A – 2 | 10 | 46W | 86 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.