Daily Sunspot Evaluation
Observation Sheet Tuesday, 10 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)
- 10
- Number of spots (f)
- 75
- Relative number (R)
- 175
- Observer
- TÖ
- Reading
- counts consistent, some coordinates doubtful
- File
- 19810310.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | HAX – 1 | 2 | 48W | 22 | 50W | 1.75 | 0 |
| 2 | HSX – 1 | 10 | 35W | 9 | 37W | 2 | 0 |
| 3 | HAX – 1 | 24 | 03W | 337 | 05W | 2 | |
| 4 | RXX – 3 | 11 | 08E | 326 | 06E | 2 | |
| 5 | EKC – 44 | 8 | 22E | 316 ⚠ | 20E | 11 | |
| 6 | HAX – 1 | -12 | 84W | 58 | 86W | 1 | |
| 7 | HAX – 1 | -3 | 65W | 39 | 67W | 1.25 | |
| 8 | EKO – 19 | -5 | 27W | 1 | 29W | 13 | |
| 9 | CAO – 3 | -6 | 61E | 273 | 59E | 2.5 | 0 |
| 10 | RXX – 1 | -6 | 68E | 266 | 66E |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.