Daily Sunspot Evaluation
Observation Sheet Thursday, 19 March 1981
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)
- 60
- Relative number (R)
- 150
- Observer
- TÖ
- Reading
- all checks consistent
- File
- 19810319.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | DKO – 13 | 14 | 49W | 265 | 51W | 7.5 | |
| 2 | AXX – 1 | 9 | 39W | 255 | 41W | ||
| 3 | AXX – 1 | 18 | 23W | 239 | 25W | ||
| 4 | DAO – 13 | 9 | 08E | 208 | 06E | 4.75 | |
| 5 | CRO – 5 | 15 | 25E | 191 | 23E | 7.25 | |
| 6 | DAO – 9 | 20 | 41E | 175 | 39E | 8.5 | |
| 7 | DAI – 10 | 11 | 50E | 166 | 48E | 10 | |
| 8 | ? – 7 | 15 | 74E | 142 | 72E | ||
| 9 | AXX – 1 | -5 | 58W | 271 | 60W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.