Daily Sunspot Evaluation
Observation Sheet Wednesday, 11 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)
- 11
- Number of spots (f)
- 87
- Relative number (R)
- 197
- Observer
- GT
- Reading
- all checks consistent
- File
- 19810311.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | HAX – 2 | 2 | 62W | 22 | 63W | ||
| 2 | HAX – 1 | 11 | 50W | 10 | 51W | ||
| 3 | HSX – 3 | 25 | 16W | 336 | 17W | ||
| 4 | FAC – 48 | 8 | 06E | 314 | 05E | ||
| 5 | AXX – 1 | 10 | 61E | 259 | 60E | ||
| 6 | ? – 1 | -2 | 80W | 40 | 81W | ||
| 7 | EKO – 9 | -3 | 43W | 3 | 44W | ||
| 8 | RXO – 4 | -20 | 35W | 355 | 36W | ||
| 9 | AXX – 4 | -3 | 09E | 311 | 08E | ||
| 10 | DRI – 12 | -5 | 49E | 271 | 48E | ||
| 11 | AXX – 2 | -20 | 60E | 260 | 59E |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.