Daily Sunspot Evaluation
Observation Sheet Monday, 16 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)
- 78
- Relative number (R)
- 178
- Observer
- TÖ
- Reading
- all checks consistent
- File
- 19810316.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | HAX – 1 | 24 | 76W | 332 | 79W | ||
| 2 | FKC – 19 | 8 | 62W | 318 | 65W | ||
| 3 | CAO – 6 | 13 | 07W | 263 | 10W | ||
| 4 | HKI – 6 | 9 | 50E | 206 | 47E | ||
| 5 | CAO – 2 | 14 | 67E | 189 | 64E | ||
| 6 | ? – 1 | 19 | 81E | 175 | 78E | ||
| 7 | CAO – 3 | -15 | 78W | 334 | 81W | ||
| 8 | DAO – 7 | -16 | 29W | 285 | 32W | ||
| 9 | DAI – 30 | -5 | 17W | 273 | 20W | ||
| 10 | GRO – 3 | -21 | 03W | 259 | 06W |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.