Daily Sunspot Evaluation
Observation Sheet Tuesday, 16 March 1971
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)
- 8
- Number of spots (f)
- 58
- Relative number (R)
- 138
- Observer
- FA
- Reading
- all checks consistent
- File
- 19710316.jpg
Sunspot groups
| No | Group (class – spots) | B | Δ L | L | Δ Lf | U | Margin no. |
|---|---|---|---|---|---|---|---|
| 1 | D – 22 | 7 | 19E | 212 | |||
| 2 | H – 6 | -5 | 16E | 215 | |||
| 3 | B – 3 | -21 | 34E | 197 | |||
| 4 | H – 13 | -17 | 32W | 262 | |||
| 5 | A – 7 | -12 | 14W | 245 | |||
| 6 | B – 4 | -11 | 50W | 281 | |||
| 7 | A – 1 | -9 | 73W | 304 | |||
| 8 | J – 2 | 19 | 11W | 242 |
Class as written on the sheet (? = group the observer marked as uncertain). ⚠: the coordinates of this row do not agree with each other.